William Ryde asks:
I was cleaning my stove, I think a little water got on one burner. When I put everything back together, and turned on the stove it blew out the fuse, I replaced the fuse. Now the oven work’s the burner light show it’s on but only one burner heats up. Does it [...]
Digital Circuits fall under two basic categories they are, Combinational and Sequential. The Combinational circuits are those which has no storage elements and the output of the combinational circuits depends only on the present input. The Sequential circuits on the other hand, has storage elements and their output depends on external inputs and the values in the storage elements. The sequential c
Ralph Stukenberg asks:
I am doing some electrical work for my mother-in-law, she wants to replace a new light in ceiling of closed in porch plus a security light on outside of same porch how can I do this with just the one switch she already has and to keep the other box on all [...]
We'd like to share with you a selection of cool racetracks we've created for Line Driver. They are sorted from the easiest one to the most difficult; the last one is pretty hard I think :) And by the way, you can challenge us on all of them! Don't hesitate to leave your challenges URL in the comments.Have fun!1. Mario Kart: Mushroom CupLet's start with an easy one...2. Track for beginnersThis on
Presents modern CMOS logic circuits, fabrication, and layout in a cohesive manner that links the material together with the system-level considerations.* Chapter on Verilog HDL allows for rapid start-up.* Illustrates the top-down design procedure used in modern VLSI chip design with an emphasis on variations in the HDL, logic, circuits and layout The rest..
The simplest LED flasher is simply to use a flashing LED based on 555 and transistor operate as astable circuit.There are many possible applications for the circuits such as Railroad crossing signal for model railroads,Safety blinkers for bicycles,Fun stuff for Halloween, like making those plastic Jack-O-lanterns blink (try using ultraviolet LEDs here),Christmas decorations,Blinkers to locate [...
So with the Turbulence Training 30 Day Max Fat Loss workouts I have been doing, I am doing weight training 4x per week. I have been avoiding intervals on the treadmill, to avoid right hip pain. I still seem to be making progress, but I need a little bit of variety in my workouts, [...]
Medical Electronics manufacturing company Opto Circuits India (OCI) is a safe stock for long term investors. It is a rare company that announced bonus and dividend for the last 7 consecutive years. It is strategically acquiring companies in the United States which will provide ample growth opportunities in the next 2 years. OCI recently announced 7:10 bonus and Rs 5 dividend for which record date
For the fourth consecutive year, MotorSport Vision has teamed up with Renault for the French manufacturer and Formula 1 constructor to supply driving experience and race meeting support vehicles to MSV venues.
The new fleet, which was unveiled this week, includes fourteen New Twingo GTs for MotorSport Vision's innovative YoungDrive experience. The Twingo is Renault’s all-new [...]
A magnetic circuit can be compared with an electric current in which EMF, or voltage, produces a current flow. The ampere-turns (NI), or the magnetomotive force (Fm or mmf), will produce a magnetic flux F (Figure 26). The mmf can be compared with EMF, and the flux (Φ) can be compared to current. Equation (1-16) [...]
In this website you will see several examples how to simulate PIC microcontroller circuit using PROTEUS VSM such as interfacing c,7-segment,switchs etc.Link
Related PostsMIDIATORBasic Stamp PIC Microcontroller Temp SensorLaser Display.NET OscilloscopeSerial interfacing LCD with Pic Microcontroller
Product Description
CMOS Memory Circuits is a systematic and comprehensive reference work designed to aid in the understanding of CMOS memory circuits, architectures, and design techniques.
CMOS technology is the dominant fabrication method and almost the exclusive choice for semiconductor memory designers.
Both the quantity and the variety of complementary-metal-oxide-semiconductor (CMOS)
Opto Circuits Bonus Issue has been recommended by the board of directors of Opto Circuits India Limited in the board meeting that was held earlier today. Certainly, bonus issue seems to be the in-thing these days. Almost every other day, one company or the other seems to be declaring a bonus issue to arrest the huge [...]
Opto Circuits India Ltd has informed the market that on a meeting that was held on may 27th 2008 they have decided on dividend and Bonus information and the information is as follows
1. Recommended payment of 50% Dividend, subject to Share Holders Approval in the Annual General Meeting.
2. Recommended to issue Bonus Shares of 7 [...]
Creating Assertion-Based IP presents formal test planning guidelines with examples focused on creating assertion-based verification IP. Creating Assertion-Based IP demonstrates a systematic process for formal specification and formal testplanning, and also demonstrates effective use of assertions languages beyond the traditional language construct discussions Note that there many books published
BASIC AC THEORY · What is alternating current (AC)? · AC waveforms · Measurements of AC magnitude · Simple AC circuit calculations · AC phase · Principles of radio COMPLEX NUMBERS · Introduction · Vectors and AC waveforms · Simple vector addition · Complex vector addition · Polar and rectangular notation · Complex number arithmetic · Mo
IntroductionSeries batteries Parallel batteries Voltage divider Current divider Potentiometer as a voltage divider Potentiometer as a rheostat Precision potentiometer Rheostat range limiting Thermoelectricity Make your own multimeter Sensitive voltage detector Potentiometric voltmeter 4-wire resistance measurement
Introduction Voltage comparator Precision voltage follower .Noninverting amplifier High-impedance voltmeter ..Integrator 555 audio oscillator 555 ramp generator PWM power controller Class B audio amplifier .
· Single-phase power systems · Three-phase power systems · Phase rotation · Polyphase motor design · Three-phase Y and configurations. · Three-phase transformer circuits. · Harmonics in polyphase power systems. · Harmonic phase sequences
· AC voltmeters and ammeters · Frequency and phase measurement · Power measurement · Power quality measurement · AC bridge circuits · AC instrumentation transducers. · Power in resistive and reactive
PARTS AND MATERIALS 4011 quad NAND gate (Radio Shack catalog # 276-2411)Eight-position DIP switch (Radio Shack catalog # 275-1301)Ten-segment bargraph LED (Radio Shack catalog # 276-081)One 6 volt batteryTwo 10 kΩ resistorsThree 470 Ω resistors Caution! The 4011 IC is CMOS, and therefore sensitive to static electricity! CROSS-REFERENCES Lessons In Electric Circuits, Volume 4, chapter 3: "Logic Gates" LEARNING OBJECTIVES Purpose of a "pulldown" resistorHow to experimentally determine the truth table of a gateHow to connect logic gates togetherHow to create different logical functions by using NAND gates SCHEMATIC DIAGRAM ILLUSTRATION INSTRUCTIONS To begin, connect a single NAND gate to two input switches and one LED, as shown. At first, the use
PARTS AND MATERIALS 4001 quad NOR gate (Radio Shack catalog # 276-2401)Eight-position DIP switch (Radio Shack catalog # 275-1301)Ten-segment bargraph LED (Radio Shack catalog # 276-081)One 6 volt batteryTwo 10 kΩ resistorsTwo 470 Ω resistorsTwo 100 Ω resistors Caution! The 4001 IC is CMOS, and therefore sensitive to static electricity! CROSS-REFERENCES Lessons In Electric Circuits, Volume 4, chapter 3: "Logic Gates" Lessons In Electric Circuits, Volume 4, chapter 10: "Multivibrators" LEARNING OBJECTIVES The effects of positive feedback in a digital circuitWhat is meant by the "invalid" state of a latch circuitWhat a race condition is in a digital circuitThe importance of valid "high" CMOS signal voltage levels SCHEMATIC DIAGRAM ILLUSTRATION I
PARTS AND MATERIALS 4011 quad NAND gate (Radio Shack catalog # 276-2411)Eight-position DIP switch (Radio Shack catalog # 275-1301)Ten-segment bargraph LED (Radio Shack catalog # 276-081)One 6 volt batteryThree 10 kΩ resistorsTwo 470 Ω resistors Caution! The 4011 IC is CMOS, and therefore sensitive to static electricity! CROSS-REFERENCES Lessons In Electric Circuits, Volume 4, chapter 3: "Logic Gates" Lessons In Electric Circuits, Volume 4, chapter 10: "Multivibrators" LEARNING OBJECTIVES Principle and function of an enabled latch circuit SCHEMATIC DIAGRAM ILLUSTRATION INSTRUCTIONS Although this circuit uses NAND gates instead of NOR gates, its behavior is identical to that of the NOR gate S-R latch (a "high" Set input drives Q "high," and a "high" Re
PARTS AND MATERIALS 4011 quad NAND gate (Radio Shack catalog # 276-2411)4001 quad NOR gate (Radio Shack catalog # 276-2401)Eight-position DIP switch (Radio Shack catalog # 275-1301)Ten-segment bargraph LED (Radio Shack catalog # 276-081)One 6 volt batteryThree 10 kΩ resistorsTwo 470 Ω resistors Caution! The 4011 IC is CMOS, and therefore sensitive to static electricity! Although the parts list calls for a ten-segment LED unit, the illustration shows two individual LEDs being used instead. This is due to lack of room on my breadboard to mount the switch assembly, two integrated circuits, and the bargraph. If you have room on your breadboard, feel free to use the bargraph as called for in the parts list, and as shown in prior latch circuits. CROSS-REFERENCES Lessons In El
PARTS AND MATERIALS 4017 decade counter/divider (Radio Shack catalog # 276-2417)555 timer IC (Radio Shack catalog # 276-1723)Ten-segment bargraph LED (Radio Shack catalog # 276-081)One SPST switchOne 6 volt battery10 kΩ resistor1 MΩ resistor0.1 µF capacitor (Radio Shack catalog # 272-135 or equivalent)Coupling capacitor, 0.047 to 0.001 µFTen 470 Ω resistorsAudio detector with headphones Caution! The 4017 IC is CMOS, and therefore sensitive to static electricity! Any single-pole, single-throw switch is adequate. A household light switch will work fine, and is readily available at any hardware store. The audio detector will be used to assess signal frequency. If you have access to an oscilloscope, the audio detector is unnecessary. CROSS-REFERENCES Lessons In Electri
PARTS AND MATERIALS 4001 quad NOR gate (Radio Shack catalog # 276-2401)4070 quad XOR gate (Radio Shack catalog # 900-6906)Two, eight-position DIP switches (Radio Shack catalog # 275-1301)Two light-emitting diodes (Radio Shack catalog # 276-026 or equivalent)Four 1N914 "switching" diodes (Radio Shack catalog # 276-1122)Ten 10 kΩ resistorsTwo 470 Ω resistorsPushbutton switch, normally open (Radio Shack catalog # 275-1556)Two 6 volt batteries Caution! Both the 4001 and 4070 ICs are CMOS, and therefore sensitive to static electricity! This experiment may be built using only one 8-position DIP switch, but the concept is easier to understand if two switch assemblies are used. The idea is, one switch acts to hold the correct code for unlocking the lock, while the other switch serves
PARTS AND MATERIALS 555 timer IC (Radio Shack catalog # 276-1723)One 1N914 "switching" diode (Radio Shack catalog # 276-1122)Two 10 kΩ resistorsOne 100 µF capacitor (Radio Shack catalog # 272-1028)4027 dual J-K flip-flop (Radio Shack catalog # 900-4394)Ten-segment bargraph LED (Radio Shack catalog # 276-081)Three 470 Ω resistorsOne 6 volt battery Caution! The 4027 IC is CMOS, and therefore sensitive to static electricity! CROSS-REFERENCES Lessons In Electric Circuits, Volume 4, chapter 10: "Multivibrators" Lessons In Electric Circuits, Volume 4, chapter 11: "Counters" LEARNING OBJECTIVES Using the 555 timer as a square-wave oscillatorHow to make an asynchronous counter using J-K flip-flops SCHEMATIC DIAGRAM ILLUSTRATION INSTRUCTIONS In a s
PARTS AND MATERIALS 4511 BCD-to-7seg latch/decoder/driver (Radio Shack catalog # 900-4437)Common-cathode 7-segment LED display (Radio Shack catalog # 276-075)Eight-position DIP switch (Radio Shack catalog # 275-1301)Four 10 kΩ resistorsSeven 470 Ω resistorsOne 6 volt battery Caution! The 4511 IC is CMOS, and therefore sensitive to static electricity! CROSS-REFERENCES Lessons In Electric Circuits, Volume 4, chapter 9: "Combinational Logic Functions" LEARNING OBJECTIVES How to use the 4511 7-segment decoder/display driver ICGain familiarity with the BCD codeHow to use 7-segment LED assemblies to create decimal digit displaysHow to identify and use both "active-low" and "active-high" logic inputs SCHEMATIC DIAGRAM ILLUSTRATION INSTRUCTIONS This experiment
Analog circuits are circuits dealing with signals free to vary from zero to full power supply voltage. This stands in contrast to digital circuits, which almost exclusively employ "all or nothing" signals: voltages restricted to values of zero and full supply voltage, with no valid state in between those extreme limits. Analog circuits are often referred to as linear circuits to emphasize the valid continuity of signal range forbidden in digital circuits, but this label is unfortunately misleading. Just because a voltage or current signal is allowed to vary smoothly between the extremes of zero and full power supply limits does not necessarily mean that all mathematical relationships between these signals are linear in the "straight-line" or "proportional" sense of the word. As you wi
PARTS AND MATERIALS Operational amplifier, model 1458 or 353 recommended (Radio Shack catalog # 276-038 and 900-6298, respectively)Three 6 volt batteriesTwo 10 kΩ potentiometers, linear taper (Radio Shack catalog # 271-1715)One light-emitting diode (Radio Shack catalog # 276-026 or equivalent)One 330 Ω resistorOne 470 Ω resistor This experiment only requires a single operational amplifier. The model 1458 and 353 are both "dual" op-amp units, with two complete amplifier circuits housed in the same 8-pin DIP package. I recommend that you purchase and use "dual" op-amps over "single" op-amps even if a project only requires one, because they are more versatile (the same op-amp unit can function in projects requiring only one amplifier as well as in projects requiring two). In the int
PARTS AND MATERIALS Operational amplifier, model 1458 or 353 recommended (Radio Shack catalog # 276-038 and 900-6298, respectively)Three 6 volt batteriesOne 10 kΩ potentiometer, linear taper (Radio Shack catalog # 271-1715) CROSS-REFERENCES Lessons In Electric Circuits, Volume 3, chapter 8: "Operational Amplifiers" LEARNING OBJECTIVES How to use an op-amp as a voltage followerPurpose of negative feedbackTroubleshooting strategy SCHEMATIC DIAGRAM ILLUSTRATION INSTRUCTIONS In the previous op-amp experiment, the amplifier was used in "open-loop" mode; that is, without any feedback from output to input. As such, the full voltage gain of the operational amplifier was available, resulting in the output voltage saturating for virtually any amount of dif
PARTS AND MATERIALS Operational amplifier, model 1458 or 353 recommended (Radio Shack catalog # 276-038 and 900-6298, respectively)Three 6 volt batteriesTwo 10 kΩ potentiometers, linear taper (Radio Shack catalog # 271-1715) CROSS-REFERENCES Lessons In Electric Circuits, Volume 3, chapter 8: "Operational Amplifiers" LEARNING OBJECTIVES How to use an op-amp as a single-ended amplifierUsing divided, negative feedback SCHEMATIC DIAGRAM ILLUSTRATION INSTRUCTIONS This circuit differs from the voltage follower in only one respect: output voltage is "fed back" to the inverting (-) input through a voltage-dividing potentiometer rather than being directly connected. With only a fraction of the output voltage fed back to the inverting input, the op-amp will
PARTS AND MATERIALS Operational amplifier, model TL082 recommended (Radio Shack catalog # 276-1715)Operational amplifier, model LM1458 recommended (Radio Shack catalog # 276-038)Four 6 volt batteriesOne meter movement, 1 mA full-scale deflection (Radio Shack catalog #22-410)15 kΩ precision resistorFour 1 MΩ resistors The 1 mA meter movement sold by Radio Shack is advertised as a 0-15 VDC meter, but is actually a 1 mA movement sold with a 15 kΩ +/- 1% tolerance multiplier resistor. If you get this Radio Shack meter movement, you can use the included 15 kΩ resistor for the resistor specified in the parts list. This meter experiment is based on a JFET-input op-amp such as the TL082. The other op-amp (model 1458) is used in this experiment to demonstrate the absence of latch-up: a
PARTS AND MATERIALS Four 6 volt batteriesOperational amplifier, model 1458 recommended (Radio Shack catalog # 276-038)One 10 kΩ potentiometer, linear taper (Radio Shack catalog # 271-1715)Two capacitors, 0.1 µF each, non-polarized (Radio Shack catalog # 272-135)Two 100 kΩ resistorsThree 1 MΩ resistors Just about any operational amplifier model will work fine for this integrator experiment, but I'm specifying the model 1458 over the 353 because the 1458 has much higher input bias currents. Normally, high input bias current is a bad characteristic for an op-amp to have in a precision DC amplifier circuit (and especially an integrator circuit!). However, I want the bias current to be high in order that its bad effects may be exaggerated, and so that you will learn one method of cou
PARTS AND MATERIALS Two 6 volt batteriesOne capacitor, 470 µF electrolytic, 35 WVDC (Radio Shack catalog # 272-1030 or equivalent)One capacitor, 0.1 µF, non-polarized (Radio Shack catalog # 272-135)One 555 timer IC (Radio Shack catalog # 276-1723)Two PNP transistors -- models 2N2907 or 2N3906 recommended (Radio Shack catalog # 276-1604 is a package of fifteen PNP transistors ideal for this and other experiments)Two light-emitting diodes (Radio Shack catalog # 276-026 or equivalent)One 100 kΩ resistorOne 47 kΩ resistorTwo 510 Ω resistorsAudio detector with headphones The voltage rating on the 470 µF capacitor is not critical, so long as it generously exceeds the maximum power supply voltage. In this particular circuit, that maximum voltage is 12 volts. Be sure you connect this
PARTS AND MATERIALS Four 6 volt batteriesDual operational amplifier, model TL082 recommended (Radio Shack catalog # 276-1715)One NPN power transistor in a TO-220 package -- (Radio Shack catalog # 276-2020 or equivalent)One PNP power transistor in a TO-220 package -- (Radio Shack catalog # 276-2027 or equivalent)One 1N914 switching diode (Radio Shack catalog # 276-1620)One capacitor, 47 µF electrolytic, 35 WVDC (Radio Shack catalog # 272-1015 or equivalent)Two capacitors, 0.22 µF, non-polarized (Radio Shack catalog # 272-1070)One 10 kΩ potentiometer, linear taper (Radio Shack catalog # 271-1715) Be sure to use an op-amp that has a high slew rate. Avoid the LM741 or LM1458 for this reason. The closer matched the two transistors are, the better. If possible, try to obtain TIP41
A semiconductor device is one made of silicon or any number of other specially prepared materials designed to exploit the unique properties of electrons in a crystal lattice, where electrons are not as free to move as in a conductor, but are far more mobile than in an insulator. A discrete device is one contained in its own package, not built on a common semiconductor substrate with other components, as is the case with ICs, or integrated circuits. Thus, "discrete semiconductor circuits" are circuits built out of individual semiconductor components, connected together on some kind of circuit board or terminal strip. These circuits employ all the components and concepts explored in the previous chapters, so a firm comprehension of DC and AC electricity is essential before embarking on
PARTS AND MATERIALS 6 volt batteryPower transformer, 120VAC step-down to 12VAC (Radio Shack catalog # 273-1365, 273-1352, or 273-1511).One 1N4001 rectifying diode (Radio Shack catalog # 276-1101)One neon lamp (Radio Shack catalog # 272-1102)Two toggle switches, SPST ("Single-Pole, Single-Throw") A power transformer is specified, but any iron-core inductor will suffice, even the home-made inductor or transformer from the AC experiments chapter! The diode need not be an exact model 1N4001. Any of the "1N400X" series of rectifying diodes are suitable for the task, and they are quite easy to obtain. I recommend household light switches for their low cost and durability. CROSS-REFERENCES Lessons In Electric Circuits, Volume 1, chapter 16: "RC and L/R Time Constants" Lesson
PARTS AND MATERIALS Low-voltage AC power supply (6 volt output)6 volt batteryOne 1N4001 rectifying diode (Radio Shack catalog # 276-1101)Small "hobby" motor, permanent-magnet type (Radio Shack catalog # 273-223 or equivalent)Audio detector with headphones0.1 µF capacitor (Radio Shack catalog # 272-135 or equivalent) The diode need not be an exact model 1N4001. Any of the "1N400X" series of rectifying diodes are suitable for the task, and they are quite easy to obtain. See the AC experiments chapter for detailed instructions on building the "audio detector" listed here. If you haven't built one already, you're missing a simple and valuable tool for experimentation. A 0.1 µF capacitor is specified for "coupling" the audio detector to the circuit, so that only AC reaches the dete
PARTS AND MATERIALS Low-voltage AC power supply (6 volt output)Two 1N4001 rectifying diodes (Radio Shack catalog # 276-1101)Small "hobby" motor, permanent-magnet type (Radio Shack catalog # 273-223 or equivalent)Audio detector with headphones0.1 µF capacitorOne toggle switch, SPST ("Single-Pole, Single-Throw") It is essential for this experiment that the low-voltage AC power supply be equipped with a center tap. A transformer with a non-tapped secondary winding simply will not work for this circuit. The diodes need not be exact model 1N4001 units. Any of the "1N400X" series of rectifying diodes are suitable for the task, and they are quite easy to obtain. CROSS-REFERENCES Lessons In Electric Circuits, Volume 3, chapter 3: "Diodes and Rectifiers" LEARNING OBJECTIVES D
PARTS AND MATERIALS Low-voltage AC power supply (6 volt output)Four 1N4001 rectifying diodes (Radio Shack catalog # 276-1101)Small "hobby" motor, permanent-magnet type (Radio Shack catalog # 273-223 or equivalent) CROSS-REFERENCES Lessons In Electric Circuits, Volume 3, chapter 3: "Diodes and Rectifiers" LEARNING OBJECTIVES Design of a bridge rectifier circuitAdvantages and disadvantages of the bridge rectifier circuit, compared to the center-tap circuit SCHEMATIC DIAGRAM ILLUSTRATION INSTRUCTIONS This circuit provides full-wave rectification without the necessity of a center-tapped transformer. In applications where a center-tapped, or split-phase, source is unavailable, this is the only practical method of full-wave rectification. In addition to requir
PARTS AND MATERIALS Low-voltage AC power supplyBridge rectifier pack (Radio Shack catalog # 276-1185 or equivalent)Electrolytic capacitor, 1000 µF, at least 25 WVDC (Radio Shack catalog # 272-1047 or equivalent)Four "banana" jack style binding posts, or other terminal hardware, for connection to potentiometer circuit (Radio Shack catalog # 274-662 or equivalent)Metal box12-volt light bulb, 25 wattLamp socket A bridge rectifier "pack" is highly recommended over constructing a bridge rectifier circuit from individual diodes, because such "packs" are made to bolt onto a metal heat sink. A metal box is recommended over a plastic box for its ability to function as a heat sink for the rectifier. A larger capacitor value is fine to use in this experiment, so long as its working voltage
No text on electrical metering could be called complete without a section on bridge circuits. These ingenious circuits make use of a null-balance meter to compare two voltages, just like the laboratory balance scale compares two weights and indicates when they're equal. Unlike the "potentiometer" circuit used to simply measure an unknown voltage, bridge circuits can be used to measure all kinds of electrical values, not the least of which being resistance. The standard bridge circuit, often called a Wheatstone bridge, looks something like this: When the voltage between point 1 and the negative side of the battery is equal to the voltage between point 2 and the negative side of the battery, the null detector will indicate zero and the bridge is said to be "balanced." The bridge'
A practical application of switch and relay logic is in control systems where several process conditions have to be met before a piece of equipment is allowed to start. A good example of this is burner control for large combustion furnaces. In order for the burners in a large furnace to be started safely, the control system requests "permission" from several process switches, including high and low fuel pressure, air fan flow check, exhaust stack damper position, access door position, etc. Each process condition is called a permissive, and each permissive switch contact is wired in series, so that if any one of them detects an unsafe condition, the circuit will be opened: If all permissive conditions are met, CR1 will energize and the green lamp will be lit. In real life, more tha
The interlock contacts installed in the previous section's motor control circuit work fine, but the motor will run only as long as each pushbutton switch is held down. If we wanted to keep the motor running even after the operator takes his or her hand off the control switch(es), we could change the circuit in a couple of different ways: we could replace the pushbutton switches with toggle switches, or we could add some more relay logic to "latch" the control circuit with a single, momentary actuation of either switch. Let's see how the second approach is implemented, since it is commonly used in industry: When the "Forward" pushbutton is actuated, M1 will energize, closing the normally-open auxiliary contact in parallel with that switch. When the pushbutton is released, the cl
A team of researchers at the National Institute of Advanced Industrial Science and Technology in Tsukuba, Ibaraki Prefecture, has succeeded in producing hyperfine 3-D circuits using carbon nanotubes, it was learned Sunday. The team led by Kenji Hata released their findings in the on-line version of the May 4 issue of Nature Nanotechnology. The discovery is expected to help reduce the size of integrated circuits and allow the development of highly sophisticated sensors, the researchers said. The researchers synthesized nanotubes by blowing carbon gas that had been heated to about 800 C over a silicon board. They then processed the resulting nanotubes applying a technique normally used to make semiconductors. The process enabled the researchers to produce ultrafine wires as thin as 0.00
Product DescriptionThere is truly a lack of good, basic hardwire electronic "how-to" books. The market seems interested in this type of fun project compilation. This is another book in our extremely successful "Evil Genius" series. So far, each of the books has sold about $50,000 in less than 3 months.The perfect addition to our "Evil Genius" series, this book details everything an electronics hobbyist would want to know about circuits and circuit design through 57 Lessons. Readers work through 5 distinct, useful projects to reinforce their learning. From the Back CoverFROM CIRCUIT FAINT HEART TO CIRCUIT LION HEART IN 57 EASY AND FUN LESSONSFeaturing everything an electronics hobbyist could want to learn about circuits and circuit design, Dave Cutcher's Electronic Circuits for the Evil Gen
Hewlett-Packard (NYSE: HPQ) has announced that researchers from its own research facility in HP Labs have proven the existence of the theoretical "fourth...
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The IASTED International Conference on Circuits and Systems (CS 2008) will take place in Kailua-Kona, Hawaii, USA, August 18-20, 2008.
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כ'ב בניסן תשס"חAnnwyn 23Motzi Shabbat Hebrew letter tarot reading performed under the waning gibbous moon 65% full during the planetary hour of the moon.The 3 letters:ז ש סof seven (ז) full circles of fire (שס 360 degrees, moznayim) cast
Analog-Baseband Architectures and CircuitsFor Multistandard and Low-Voltage Wireless Transceivers, Techniques developed on architecture level for efficient system-in-package (SiP) integration, testability and multi-standardability; and on circuit level for reducing the required supply voltage, power and area, are generally applicable for most wireless systems, and are somewhat independent to technology scaling.://w14.easy-share.com/6062131.html
Power Converter CircuitsRectification, inversion, cycloconversion, and conversion circuits It describes switching, voltage, and current relationships, as well as converter properties, operation, control, and performance as utilized in most practical applications. Authored jointly by a veteran scholar and an accomplished researcher in the field,
Analog-Baseband Architectures and CircuitsFor Multistandard and Low-Voltage Wireless Transceivers, Techniques developed on architecture level for efficient system-in-package (SiP) integration, testability and multi-standardability; and on circuit level for reducing the required supply voltage, power and area, are generally applicable for most wireless systems, and are somewhat independent to technology scaling.://w14.easy-share.com/6062131.html
DIY Circuits of the Bent Festival Kick Off in LA, Then NYC, Minneapolis - Shining, happy people bending toys. Photo by Beatrix*Jar — see our interview.Despite the name, the Bent Festival this year promises to be about not only circuit bending, but DIY sound in general. (Circuit shaping? Circuit straightening? General circuitration?) Our friend and CDM regular Mike Una has put together fantastic art installations for Minneapolis. Workshops [...] More: continued here Other Review: Cowboy Bebop Tank: The Best (Audio CD)
Once again, when building battery/resistor circuits, the student or hobbyist is faced with several different modes of construction. Perhaps the most popular is the solderless breadboard: a platform for constructing temporary circuits by plugging components and wires into a grid of interconnected points. A breadboard appears to be nothing but a plastic frame with hundreds of small holes in it. Underneath each hole, though, is a spring clip which connects to other spring clips beneath other holes. The connection pattern between holes is simple and uniform: Suppose we wanted to construct the following series-parallel combination circuit on a breadboard: The recommended way to do so on a breadboard would be to arrange the resistors in approximately the same pattern as seen in the
Felt Sound Circuits in Los Angeles: Openings Available - I still love the idea of soft circuits: electronics packaged in soft form factors instead of hard. It’s a big challenge — for one, you need some soft fabrication skills along with electronics skills, and then you have to contend with keeping your electronics happy in a soft (warm) place, which is the opposite of [...] More: continued here Other Review: Jungle Book (Audio CD)
The Gigahertz race has now become a multi-core race, but scientists have ideas to ramp up the clock speed at a faster pace again: Terahertz computers may be within reach – if data is carried over optical instead of electrical circuits.read more | digg story
In the course of learning about electricity, you will want to construct your own circuits using resistors and batteries. Some options are available in this matter of circuit assembly, some easier than others. In this section, I will explore a couple of fabrication techniques that will not only help you build the circuits shown in this chapter, but also more advanced circuits. If all we wish to construct is a simple single-battery, single-resistor circuit, we may easily use alligator clip jumper wires like this: Jumper wires with "alligator" style spring clips at each end provide a safe and convenient method of electrically joining components together. If we wanted to build a simple series circuit with one battery and three resistors, the same "point-to-point" construction techn
Let's start with a parallel circuit consisting of three resistors and a single battery: The first principle to understand about parallel circuits is that the voltage is equal across all components in the circuit. This is because there are only two sets of electrically common points in a parallel circuit, and voltage measured between sets of common points must always be the same at any given time. Therefore, in the above circuit, the voltage across R1 is equal to the voltage across R2 which is equal to the voltage across R3 which is equal to the voltage across the battery. This equality of voltages can be represented in another table for our starting values: Just as in the case of series circuits, the same caveat for Ohm's Law applies: values for voltage, current, and re
Let's start with a series circuit consisting of three resistors and a single battery: The first principle to understand about series circuits is that the amount of current is the same through any component in the circuit. This is because there is only one path for electrons to flow in a series circuit, and because free electrons flow through conductors like marbles in a tube, the rate of flow (marble speed) at any point in the circuit (tube) at any specific point in time must be equal. From the way that the 9 volt battery is arranged, we can tell that the electrons in this circuit will flow in a counter-clockwise direction, from point 4 to 3 to 2 to 1 and back to 4. However, we have one source of voltage and three resistances. How do we use Ohm's Law here? An important ca
Diodes can perform switching and digital logic operations. Forward and reverse bias switch a diode between the low and high impedance states, respectively. Thus, it serves as a switch. Logic Diodes can perform digital logic functions: AND, and OR. Diode logic was used in early digital computers. It only finds limited application today. Sometimes it is convenient to fashion a single logic gate from a few diodes. Diode AND gate An AND gate is shown in Figure above. Logic gates have inputs and an output (Y) which is a function of the inputs. The inputs to the gate are high (logic 1), say 10 V, or low, 0 V (logic 0). In the figure, the logic levels are generated by switches. If a switch is up, the input is effectively high (1). If the switch is down, it connects a diode cath
A popular use of diodes is for the mitigation of inductive “kickback:” the pulses of high voltage produced when direct current through an inductor is interrupted. Take, for example, this simple circuit in Figure below with no protection against inductive kickback. Inductive kickback: (a) Switch open. (b) Switch closed, electron current flows from battery through coil which has polarity matching battery. Magnetic field stores energy. (c) Switch open, Current still flows in coil due to collapsing magnetic field. Note polarity change on coil changed. (d) Coil voltage vs time. When the pushbutton switch is actuated, current goes through the inductor, producing a magnetic field around it. When the switch is de-actuated, its contacts open, interrupting current through the in
The circuits in Figure below are known as clampers or DC restorers. The corresponding netlist is in Figure below. These circuits clamp a peak of a waveform to a specific DC level compared with a capacitively coupled signal which swings about its average DC level (usually 0V). If the diode is removed from the clamper, it defaults to a simple coupling capacitor-- no clamping. What is the clamp voltage? And, which peak gets clamped? In Figure below (a) the clamp voltage is 0 V ignoring diode drop, (more exactly 0.7 V with Si diode drop). In Figure below, the positive peak of V(1) is clamped to the 0 V (0.7 V) clamp level. Why is this? On the first positive half cycle, the diode conducts charging the capacitor left end to +5 V (4.3 V). This is -5 V (-4.3 V) on the right end at V(1,4). N
A circuit which removes the peak of a waveform is known as a clipper. A negative clipper is shown in Figure below. This schematic diagram was produced with Xcircuit schematic capture program. Xcircuit produced the SPICE net list Figure below, except for the second, and next to last pair of lines which were inserted with a text editor. *SPICE 03437.eps* A K ModelNameD1 0 2 diodeR1 2 1 1.0kV1 1 0 SIN(0 5 1k).model diode d.tran .05m 3m.end Clipper: clips negative peak at -0.7 V. During the positive half cycle of the 5 V peak input, the diode is reversed biased. The diode does not conduct. It is as if the diode were not there. The positive half cycle is unchanged at the output V(2) in Figure below. Since the output positive peaks actually overlays the input sinewave V(
Now we come to the most popular application of the diode: rectification. Simply defined, rectification is the conversion of alternating current (AC) to direct current (DC). This involves a device that only allows one-way flow of electrons. As we have seen, this is exactly what a semiconductor diode does. The simplest kind of rectifier circuit is the half-wave rectifier. It only allows one half of an AC waveform to pass through to the load. (Figure below) Half-wave rectifier circuit. For most power applications, half-wave rectification is insufficient for the task. The harmonic content of the rectifier's output waveform is very large and consequently difficult to filter. Furthermore, the AC power source only supplies power to the load once every half-cycle, meaning that muc
Electronic Experiment Kit with Computer Inteface, Snap-Circuits
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Publisher: Elenco Electronics IncSalesrank: 75579Released: 12 June, 2006
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Snap-Circuits are the Best Introduction to Hands on Electronics Experimentation on the Market.
Complete over 300 Snap-Circuits experiments.
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Electronic Circuits for the Evil Genius# Author:Dave Cutcher# Format:PDF 11.3MB# Page Count: 225 pages# Publisher: McGraw-Hill/TAB Electronics; 1 edition (November 24, 2004)# Language: English# ISBN-10: 0071448810# ISBN-13: 978-0071448819There is truly a lack of good, basic hardwire electronic "how-to" books. The market seems interested in this type of fun project compilation. This is another book in our extremely successful "Evil Genius" series. So far, each of the books has sold about $50,000 in less than 3 months.The perfect addition to our "Evil Genius" series, this book details everything an electronics hobbyist would want to know about circuits and circuit design through 57 Lessons. Readers work through 5 distinct, useful projects to reinforce their learning.
