New Circuits Page 50
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Electronics Tutorial about the 555 Oscillator and How the 555 Oscillator can be used as a 555 Astable Oscillator Circuit to Generate Square Wave Waveforms....
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A 2001 monte carlo. the only thing that will work is the lights. no radio no wipers noturn signals, none of the dash lights will come on when you turn the key on, i was told that my computer systym was out of sync. how would you go about resetting this....
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This is my student assignment for the class "Designing Microprocessor Based Instrumentation". The board demonstrates the use of 12-bit ADC, writing c program with digital filtering and interface the LED display. The reading provides 0. 1C sensitivity. The....
-
This circuit is much more modest, but certainly still worth the effort. It provides a high quality interior light delay. This is a feature that is included as standard with most modern cars, although the version with an automatic dimmer is generally only....
-
The converter shown in Figure 1 uses a member of the PeakSwitch family (U1, a PKS606YN) to drive a 36 W motor, while delivering startup and load transition peaks of up to 72 W. The motor`s speed is variable by two methods: 1) potentiometer R20 (connected to....
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Adjust value of R1 to get good performance of sensor LDR, if in your practice with 2. 2 M ohm still turn on the lamp you can add value of R1 with the large of 2. 2 M ohm. R1 and R2 is used as voltage divider. R2 is LDR that resistance will change when LDR in....
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The circuit given here produces an alarm similar to the police siren. When you press the push button switch S2 capacitor C1 will charge and this will make the transistor Q1 to ON slowly. When the switch S1 is released the C1 will discharge and the transistor....
-
The chassis is made of aluminum L-profile (30x30x2 mm) and the candles are made of 13 mm aluminum pipes. The structure is about 35 cm wide and 25 cm high, and assembled with two component glue. The fittings (E10) and bulbs (14V, 3W) are obtained from an old....
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This demodulator is suitable for the quadrature phase-shift keying (QPSK) modulator previously published by the same author, "Novel Low-Cost QPSK Modulator Needs No Adjustments" (electronic design, Sept. 16, 2002, p. 92). Also based on common CMOS logic, it....
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-
This schematic shows a peak-reading diode voltmeter driven by two stages of amplification. A 100- F capacitor provides a fairly large time constant, which results in satisfactory meter damping. The limited differential output voltage coupled with an....
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-
The Part of 1986 Honda Civic Wiring Diagram: neutral, automatic choke hater, charge warning light, resister, starter motor, sterter solenoid, thermo sw, reguletor, alternator, destributor, igniter, ignition coil, spark plugs, air temperature sensor,..
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MLX90614 is a very useful infrared thermometer (no contact needed) that gives you the average temperature reading of all objects in the view range. In addition to it`s principal temperature reading function, it can be used for movement or even presence....
-
Normally analogue-to-digital converter (ADC) needs interfacing through a microprocessor to convert analogue data into digital format. This requires hardware and necessary software, resulting in increased complexity and hence the total cost. The circuit of....
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R1 = 470K N1, N2 = MC14093B R2 = 15M* T1 = 2N3906 (these will work also: PN200, 2N4413) C1-C4 = 2N2 (2. 2nF) (NTE159, ECG159, BC557, BC157, TUP ) D1 = 1N4001 Ry = Relay (12V or matching supply voltage) D2, 3 = 1N4148 Sensor = Stainless Steel probes, brass,....
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Have you ever seen the stairs to one of the upper stories in your house turn into a waterfall? Or maybe you ve come home to find your aquarium fish trying to swim across the carpet? For your sake, we hope not, because the consequences are usually fairly....
-
-
The following construction of low-frequency harmonic signal generator was necessary for debugging and measurement of audio amplifiers and other circuits,....
-
The DPT Transmitter is a dual powered Voice Transmitter that came about from quite a few request for a transmitter that would function both at power when long range was needed and with a "switch that could be thrown" for a smaller battery consumption when....
-
Although analog and digital controllers may appear vastly different, their principles of operation are usually quite similar. Therefore, popular analog tools like Spice can still be used to benefit common digital proportional-integral controllers through....
-
2 meters 144MHz push pull amplifier wich can generate 200W, how does it sound ? Sounds delicious with 2 DV28120T transistors. DV28120T push pull amplifier....
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Withthe 1.5V battery supply power, The Integrated circuit LM3909 can drive the light emitting diode NSL5027. The 300uF electrolytic capacitor is circumscribed capacitor? which makes the flash speed limit around 1Hz....
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This demo board data sheet describes how to use the HV758DB1 to generate the basic high voltage pulse waveform as an ultrasound transmitting pulser. The HV758 circuit uses the DC coupling method in all Level Translators There are no external coupling....
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Using a mobile phone while driving is dangerous. It is also against the law. However, you can use your mobile phone as a powerful music player with the help of a stereo power amplifier. This does away with the need of a sophisticated in-dash car music....
-
The V2. 2 PCB has 4 spare connectors (X11 to X14) these can be used for various inputs and outputs for the following circuits as they are conveniently available on the 37pin DB connector: The V3. 0 PCB has 4 spare connectors (SPR1 to 4) these can be used for....
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DC current (Battery) is needed by the carbon transmitter to make the phone work. The way the telephone company does things is to feed battery to a telephone line using a device that allows the DC (Direct Current) to flow but does not short out the AC....
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Building circuits to interface an Amiga A1200 to a PC AT/ATX power supply and tower case....
-
This kit, designed by Jan G0BBL and implemented and distributed by Tony KB9YIG, is a plug-in board for the Softrock Lite + Xtall RX V9. 0 which down-converts VHF signals in the 2m and 6m bands to HF signals that can be received on the V9. 0 RX. Also....
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This lead acid battery charger circuit is designed in response to a request from Mr. Devdas. C. His requirement was a circuit to charge two 12V/7AH lead acid batteries in series. Anyway he did not mentioned the no of cells per each 12V battery. The no of....
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I bricked my iPod shuffle, seems that the controller chip for the mini jack got wasted as it could no longer detect charger, PC connection or play music as it could not detect headphones. The arc have to be very short in order to limit the distortions of an....
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I am about to post a How To on testing DDL`s circuit before adding the LD, I hope it is all pretty clear and with no errors. Those ....
-
The classic Wien-Bridge oscillator, with incandescent lamp nonlinear stabilization, provides a low distortion sine wave source. A thorough and clear discussion of the Wien-Bridge oscillator is provided in Malvino`s Electronic Principles. Using an inexpensive....
-
Color sensor is an interesting project for hobbyists. The circuit can sense eight colors, i. e. blue, green and red (primary colors); magenta, yellow and cyan (secondary colors); and black and white. The circuit is based on the fundamentals of optics and....
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-
Hey everyone! This is my first tutorial, but I do have experience with other tutorial making! So I will be fine. As a side note, my camera is not....
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-
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If you need a triangle wave signal or a square one but you only have a sinewave generator, use this converter to avoid the trouble of beginning from scratch. It is made up of two ICs: one LM13700 and one TL084. The amplitude of the squarewave can be varied....
-
As electric utility companies grapple with the need to reduce greenhouse gas emissions and the increasing costs and lead-times for introducing new generating capacity they are turning to the concept of the smart grid. One of the core elements of the smart....
-
Atmel On the PC keyboard PS 2 AT89C2051 keylogers circuit connection cable connects to the circuit between what is written in the wake of the program running...
-
A simple 12V to 24V dc dc converter circuit with diagram built around LM324. This boost converter with schematic can provide up to 800mA output current and a steady 24V DC....
-
A window comparator formed by two op-amps packaged into IC1 is the heart of the circuit below. With this technique, we can detect precisely and symmetrically....
-
12V Vehicle Electrical Wiring Tester Circuit This little tester is useful for checking vehicle electrical circuits. Two LEDs indicate whether....
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Simple random number generator using 8051 microcontroller. AT89S51 is the controller used here....
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This is a 3 Band Equalizer circuit. This circuit is made to control the treble, middle and bass range. This circuit uses a single op-amp. With single op-amp we...
-
-
To be independent of the local radio stations for testing VHF receivers, you need a frequency-modulated oscillator that covers the range of 89. 5 to 108 MHz ” but building such an oscillator using discrete components is not that easy. Maxim now has available....
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-
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FM Radio Receiver IC TDA 7012T is very simple, but it has an FM radio receiver sensitivity and good selectivity. Single Chip FM Receifer cool name of IC TDA7012T 7012T TDA is to build an FM receiver requires a few additional components. Feature contained in....
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This project is almost useless, I want just to realize a pendulum that swings endless. Nothing more. No use at all. This is not an original project but my version of a project of the past century, already seen in many different ways on the Net. This is my....
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This is an interface circuit for digital data input. This circuit consist of touch button, op-amp, diode, capacitor and resistors. Any conductor surface can be...
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Build circuit on a 1" square circuit board. Position the variable resister so that it can be adjusted from one of the edges. Attach the CdS cells at the other end but not at the edge. Drill out two pins next to the center of one of the long sides of a Lego....
-
This Home Alarm System is simple, secure, fast and cheap. It`s only few components with maximum security with Rolling Code TX and Shock Sensor with variable sensitivity. The alarm module can be assembled in only 2 hours and it don`t need manual preset. Home....
-
Is equivalent to single-pole electromechanical latching relay with electrically isolated solenoid. Once turned on, circuit remains in conducting state even though line voltage is interrupted for long periods of time. Positive reset action requires that....
-
-
This alarm circuit was designed to monitor a mains-powered smoke detector located in a shed (which is used to house dog kennels). It provides complete isolation from the mains so that low-voltage (12V) cabling could be run to the alarm circuit which is....
-
This AC Power Monitor continuously watches the AC power line voltage for both under-voltage and missing cycles. When it detects a total of 5 or 6 consecutive missing half-cycles (50mS, 50/60HZ), it drops a relay and starts a timer. A power contactor is....
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Input and output (I/O) on the Arduino web server using the SD card. Arduino inputs (analogue inputs, switches) are displayed on a web page. Arduino outputs (LEDs) are controlled from a web page. Uses Ajax for flicker free loading....
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-
This 555 timer is designed unusually to give a positive output through a control over its reset pin. Usually the timer IC 555 is triggered by applying a ne....
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This is a Very Simple circuit for Lead Acid Battery Charger using PB137 Regulator. The PB137 is used for lead acid battery charger circuit because it can give....
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-
The RF modulator is the very important component in TV, VCR, satellite receiver, format converter, home computer and game machine. This circuit is simple, stable and easy to make, it can be easily connected with a lot kinds of circuit boards. The figure is....
-
The carbon dioxide (CO2) laser is the powerhouse for high tech industrial cutting and welding of metals and many other materials. Small CO2 lasers are used for marking of metal, wood, and composites, and in medicine and surgery. Even a `small` CO2 laser....
-
Hi! I`m going to build stcs2 based driver for 445nm. I choosed it because it has low vdrop - I`m going to power it from 2x li-ion. I found schematic....
-
Here is the schematic from the Eico 667 tube tester. It is very similar to the 666, except now there are a pair of extra levers, and a few test sockets are missing. But the meat and potatoes are identical. If you are planning to restore your 667 to peak....
-
The circuit given here is designed as an LED flasher which produces a rotating effect when the LEDs are arranged properly. The circuit has very low current consumption and can be operated from even 3V button cells. The IC 1 (CMOS NE555) is wired as an....
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We had already connected Phase & Neutral (from Power house) to Electrical Appliances i. e. Fans, Light points etc. So according the above UPS Connection Diagram. connect an extra wire (phase) to those appliances where we have already connected phase and....
-
-
This is A 8 bit Up/Down Counter that together with the “8 Bit Binary to 256 Decimal (1 of 256) Decoder “ makes a Run Light. I tried to to put all the 256....
-
By taking the Trigger input (pin 2) "LOW", switch in Set position, changes the output state into the "HIGH" state and by taking the Reset input (pin 4) "LOW", switch in Reset position, changes the output into the "LOW" state. This 555 timer circuit will....
-
Non inverting audio amplifier schematic. This Non-inverting audio amplifier circuit may be applied to Multi-channel audio systems, stereo phonographs, tape recorders and players, AM-FM radio receivers, servo amplifiers, Intercom systems, Automotive products.....
-
Making Electromagnetic Weapons series. For the Electromagnetic Pulse Generator, check out the last three articles (One, Two and Three). I`m sure almost all of you have used a microwave at some point in your lives. As a child, I always found microwaves....
-
-
Fading a video signal can`t be done simply by attenuating the composite signal, since the synchronization signal may drop below unacceptable level. Here a....
-
A solution to one aspect of Power over Ethernet (PoE) is presented here utilizing the ON Semiconductor NCP1031 series of monolithic, high-voltage switching regulators with internal MOSFET. The application note provides details for constructing an....
-
The inverter circuit has a central component, the CMOS 4047, and converts a 12V DC voltage to 220V AC voltage. 4047 is utilised as a astable multivibrator. At pin 10 and 11 we find a rectangular symmetrically signal which is amplified by tow Darlington....
-
The TTY and the detector-transmitter unit are connected to separate phone jacks on the same line. When the ring sensor detects an incoming phone call, it activates the transmitter, which sends an RF signal to the receiver in the pager device. The receiver....
-
Im wiring up my 1964 xm and not sure where the wires go for the temp gauge on the back of the gauge theres an I S A the wore are Green/Black Red/White Yellow/Blue do you have any idea Thanks Haydon Ask-a-doc Web sites: If you`ve got a quick question, you can....
-
A simple and efficient 6 to 15V boost/stepup dc to dc converter based on IC L2585. This voltage converter circuit requires few external components....
-
Simple PWM lamp dimmer using NE555 timer IC. 555 timer IC wired as variable duty cycle astable multivibrator for controlling the brightness of the lamp....
-
This allows a TSCM specialist the ability to "blink" a Spectronics bugging device on for a second or two to detect it, and then to shut it back down before the eavesdropper catches on to the fact that his bugging device has just been caught. There is a small....
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-
-
-
By making this RF amplifier small power transmitters of 200 mW, can be transformed into a power transmitters reasonable, ranging between 2 and 3 W. The circuit is very simple. Network output filter suppresses noise by at least 55 dB. Amplifier is suitable....
-
The Spartan-3 Primer board has external stepper motor interfacing, indicated as in Figure. Stepper Motor is driven by ULN2803A. It is a high-voltage, high-current Darlington transistor array. ULN2803 is used as a driver for port I/O lines, drivers output....
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In this project you will build a coin toss circuit. It has three sections: a square-wave oscillator, a JK flip flop, and two LEDs (red & green). It uses CMOS digital ICs and MOSFET transistors. The schematic does not show the power and ground connections for....
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The circuit uses the very popular Sharp IR module (Vishay module can also be used). The pin nos. shown in the circuit are for the Sharp & VIshay modules. For other modules please refer to their respective datasheets. The receiver consists of a 555 timer IC....
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For this test you will need an analog (non-digital) voltmeter. Do NOT remove the distributor connector. Using small paper clips, insert them into the backside of the distributor wire harness connector to make contact with the terminals. Do NOT damage the....
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Electronics Tutorial about the 555 Oscillator and How the 555 Oscillator can be used as a 555 Astable Oscillator Circuit to Generate Square Wave Waveforms....
A 2001 monte carlo. the only thing that will work is the lights. no radio no wipers noturn signals, none of the dash lights will come on when you turn the key on, i was told that my computer systym was out of sync. how would you go about resetting this....
This is my student assignment for the class "Designing Microprocessor Based Instrumentation". The board demonstrates the use of 12-bit ADC, writing c program with digital filtering and interface the LED display. The reading provides 0. 1C sensitivity. The....
This circuit is much more modest, but certainly still worth the effort. It provides a high quality interior light delay. This is a feature that is included as standard with most modern cars, although the version with an automatic dimmer is generally only....
The converter shown in Figure 1 uses a member of the PeakSwitch family (U1, a PKS606YN) to drive a 36 W motor, while delivering startup and load transition peaks of up to 72 W. The motor`s speed is variable by two methods: 1) potentiometer R20 (connected to....
Adjust value of R1 to get good performance of sensor LDR, if in your practice with 2. 2 M ohm still turn on the lamp you can add value of R1 with the large of 2. 2 M ohm. R1 and R2 is used as voltage divider. R2 is LDR that resistance will change when LDR in....
The circuit given here produces an alarm similar to the police siren. When you press the push button switch S2 capacitor C1 will charge and this will make the transistor Q1 to ON slowly. When the switch S1 is released the C1 will discharge and the transistor....
The chassis is made of aluminum L-profile (30x30x2 mm) and the candles are made of 13 mm aluminum pipes. The structure is about 35 cm wide and 25 cm high, and assembled with two component glue. The fittings (E10) and bulbs (14V, 3W) are obtained from an old....
This demodulator is suitable for the quadrature phase-shift keying (QPSK) modulator previously published by the same author, "Novel Low-Cost QPSK Modulator Needs No Adjustments" (electronic design, Sept. 16, 2002, p. 92). Also based on common CMOS logic, it....
This schematic shows a peak-reading diode voltmeter driven by two stages of amplification. A 100- F capacitor provides a fairly large time constant, which results in satisfactory meter damping. The limited differential output voltage coupled with an....
The Part of 1986 Honda Civic Wiring Diagram: neutral, automatic choke hater, charge warning light, resister, starter motor, sterter solenoid, thermo sw, reguletor, alternator, destributor, igniter, ignition coil, spark plugs, air temperature sensor,..
MLX90614 is a very useful infrared thermometer (no contact needed) that gives you the average temperature reading of all objects in the view range. In addition to it`s principal temperature reading function, it can be used for movement or even presence....
Normally analogue-to-digital converter (ADC) needs interfacing through a microprocessor to convert analogue data into digital format. This requires hardware and necessary software, resulting in increased complexity and hence the total cost. The circuit of....
R1 = 470K N1, N2 = MC14093B R2 = 15M* T1 = 2N3906 (these will work also: PN200, 2N4413) C1-C4 = 2N2 (2. 2nF) (NTE159, ECG159, BC557, BC157, TUP ) D1 = 1N4001 Ry = Relay (12V or matching supply voltage) D2, 3 = 1N4148 Sensor = Stainless Steel probes, brass,....
Have you ever seen the stairs to one of the upper stories in your house turn into a waterfall? Or maybe you ve come home to find your aquarium fish trying to swim across the carpet? For your sake, we hope not, because the consequences are usually fairly....
The following construction of low-frequency harmonic signal generator was necessary for debugging and measurement of audio amplifiers and other circuits,....
The DPT Transmitter is a dual powered Voice Transmitter that came about from quite a few request for a transmitter that would function both at power when long range was needed and with a "switch that could be thrown" for a smaller battery consumption when....
Although analog and digital controllers may appear vastly different, their principles of operation are usually quite similar. Therefore, popular analog tools like Spice can still be used to benefit common digital proportional-integral controllers through....
2 meters 144MHz push pull amplifier wich can generate 200W, how does it sound ? Sounds delicious with 2 DV28120T transistors. DV28120T push pull amplifier....
Withthe 1.5V battery supply power, The Integrated circuit LM3909 can drive the light emitting diode NSL5027. The 300uF electrolytic capacitor is circumscribed capacitor? which makes the flash speed limit around 1Hz....
This demo board data sheet describes how to use the HV758DB1 to generate the basic high voltage pulse waveform as an ultrasound transmitting pulser. The HV758 circuit uses the DC coupling method in all Level Translators There are no external coupling....
Using a mobile phone while driving is dangerous. It is also against the law. However, you can use your mobile phone as a powerful music player with the help of a stereo power amplifier. This does away with the need of a sophisticated in-dash car music....
The V2. 2 PCB has 4 spare connectors (X11 to X14) these can be used for various inputs and outputs for the following circuits as they are conveniently available on the 37pin DB connector: The V3. 0 PCB has 4 spare connectors (SPR1 to 4) these can be used for....
DC current (Battery) is needed by the carbon transmitter to make the phone work. The way the telephone company does things is to feed battery to a telephone line using a device that allows the DC (Direct Current) to flow but does not short out the AC....
Building circuits to interface an Amiga A1200 to a PC AT/ATX power supply and tower case....
This kit, designed by Jan G0BBL and implemented and distributed by Tony KB9YIG, is a plug-in board for the Softrock Lite + Xtall RX V9. 0 which down-converts VHF signals in the 2m and 6m bands to HF signals that can be received on the V9. 0 RX. Also....
This lead acid battery charger circuit is designed in response to a request from Mr. Devdas. C. His requirement was a circuit to charge two 12V/7AH lead acid batteries in series. Anyway he did not mentioned the no of cells per each 12V battery. The no of....
I bricked my iPod shuffle, seems that the controller chip for the mini jack got wasted as it could no longer detect charger, PC connection or play music as it could not detect headphones. The arc have to be very short in order to limit the distortions of an....
I am about to post a How To on testing DDL`s circuit before adding the LD, I hope it is all pretty clear and with no errors. Those ....
The classic Wien-Bridge oscillator, with incandescent lamp nonlinear stabilization, provides a low distortion sine wave source. A thorough and clear discussion of the Wien-Bridge oscillator is provided in Malvino`s Electronic Principles. Using an inexpensive....
Color sensor is an interesting project for hobbyists. The circuit can sense eight colors, i. e. blue, green and red (primary colors); magenta, yellow and cyan (secondary colors); and black and white. The circuit is based on the fundamentals of optics and....
Hey everyone! This is my first tutorial, but I do have experience with other tutorial making! So I will be fine. As a side note, my camera is not....
If you need a triangle wave signal or a square one but you only have a sinewave generator, use this converter to avoid the trouble of beginning from scratch. It is made up of two ICs: one LM13700 and one TL084. The amplitude of the squarewave can be varied....
As electric utility companies grapple with the need to reduce greenhouse gas emissions and the increasing costs and lead-times for introducing new generating capacity they are turning to the concept of the smart grid. One of the core elements of the smart....
Atmel On the PC keyboard PS 2 AT89C2051 keylogers circuit connection cable connects to the circuit between what is written in the wake of the program running...
A simple 12V to 24V dc dc converter circuit with diagram built around LM324. This boost converter with schematic can provide up to 800mA output current and a steady 24V DC....
A window comparator formed by two op-amps packaged into IC1 is the heart of the circuit below. With this technique, we can detect precisely and symmetrically....
12V Vehicle Electrical Wiring Tester Circuit This little tester is useful for checking vehicle electrical circuits. Two LEDs indicate whether....
Simple random number generator using 8051 microcontroller. AT89S51 is the controller used here....
This is a 3 Band Equalizer circuit. This circuit is made to control the treble, middle and bass range. This circuit uses a single op-amp. With single op-amp we...
To be independent of the local radio stations for testing VHF receivers, you need a frequency-modulated oscillator that covers the range of 89. 5 to 108 MHz ” but building such an oscillator using discrete components is not that easy. Maxim now has available....
FM Radio Receiver IC TDA 7012T is very simple, but it has an FM radio receiver sensitivity and good selectivity. Single Chip FM Receifer cool name of IC TDA7012T 7012T TDA is to build an FM receiver requires a few additional components. Feature contained in....
This project is almost useless, I want just to realize a pendulum that swings endless. Nothing more. No use at all. This is not an original project but my version of a project of the past century, already seen in many different ways on the Net. This is my....
This is an interface circuit for digital data input. This circuit consist of touch button, op-amp, diode, capacitor and resistors. Any conductor surface can be...
Build circuit on a 1" square circuit board. Position the variable resister so that it can be adjusted from one of the edges. Attach the CdS cells at the other end but not at the edge. Drill out two pins next to the center of one of the long sides of a Lego....
This Home Alarm System is simple, secure, fast and cheap. It`s only few components with maximum security with Rolling Code TX and Shock Sensor with variable sensitivity. The alarm module can be assembled in only 2 hours and it don`t need manual preset. Home....
Is equivalent to single-pole electromechanical latching relay with electrically isolated solenoid. Once turned on, circuit remains in conducting state even though line voltage is interrupted for long periods of time. Positive reset action requires that....
This alarm circuit was designed to monitor a mains-powered smoke detector located in a shed (which is used to house dog kennels). It provides complete isolation from the mains so that low-voltage (12V) cabling could be run to the alarm circuit which is....
This AC Power Monitor continuously watches the AC power line voltage for both under-voltage and missing cycles. When it detects a total of 5 or 6 consecutive missing half-cycles (50mS, 50/60HZ), it drops a relay and starts a timer. A power contactor is....
Input and output (I/O) on the Arduino web server using the SD card. Arduino inputs (analogue inputs, switches) are displayed on a web page. Arduino outputs (LEDs) are controlled from a web page. Uses Ajax for flicker free loading....
This 555 timer is designed unusually to give a positive output through a control over its reset pin. Usually the timer IC 555 is triggered by applying a ne....
This is a Very Simple circuit for Lead Acid Battery Charger using PB137 Regulator. The PB137 is used for lead acid battery charger circuit because it can give....
The RF modulator is the very important component in TV, VCR, satellite receiver, format converter, home computer and game machine. This circuit is simple, stable and easy to make, it can be easily connected with a lot kinds of circuit boards. The figure is....
The carbon dioxide (CO2) laser is the powerhouse for high tech industrial cutting and welding of metals and many other materials. Small CO2 lasers are used for marking of metal, wood, and composites, and in medicine and surgery. Even a `small` CO2 laser....
Hi! I`m going to build stcs2 based driver for 445nm. I choosed it because it has low vdrop - I`m going to power it from 2x li-ion. I found schematic....
Here is the schematic from the Eico 667 tube tester. It is very similar to the 666, except now there are a pair of extra levers, and a few test sockets are missing. But the meat and potatoes are identical. If you are planning to restore your 667 to peak....
The circuit given here is designed as an LED flasher which produces a rotating effect when the LEDs are arranged properly. The circuit has very low current consumption and can be operated from even 3V button cells. The IC 1 (CMOS NE555) is wired as an....
We had already connected Phase & Neutral (from Power house) to Electrical Appliances i. e. Fans, Light points etc. So according the above UPS Connection Diagram. connect an extra wire (phase) to those appliances where we have already connected phase and....
This is A 8 bit Up/Down Counter that together with the “8 Bit Binary to 256 Decimal (1 of 256) Decoder “ makes a Run Light. I tried to to put all the 256....
By taking the Trigger input (pin 2) "LOW", switch in Set position, changes the output state into the "HIGH" state and by taking the Reset input (pin 4) "LOW", switch in Reset position, changes the output into the "LOW" state. This 555 timer circuit will....
Non inverting audio amplifier schematic. This Non-inverting audio amplifier circuit may be applied to Multi-channel audio systems, stereo phonographs, tape recorders and players, AM-FM radio receivers, servo amplifiers, Intercom systems, Automotive products.....
Making Electromagnetic Weapons series. For the Electromagnetic Pulse Generator, check out the last three articles (One, Two and Three). I`m sure almost all of you have used a microwave at some point in your lives. As a child, I always found microwaves....
Fading a video signal can`t be done simply by attenuating the composite signal, since the synchronization signal may drop below unacceptable level. Here a....
A solution to one aspect of Power over Ethernet (PoE) is presented here utilizing the ON Semiconductor NCP1031 series of monolithic, high-voltage switching regulators with internal MOSFET. The application note provides details for constructing an....
The inverter circuit has a central component, the CMOS 4047, and converts a 12V DC voltage to 220V AC voltage. 4047 is utilised as a astable multivibrator. At pin 10 and 11 we find a rectangular symmetrically signal which is amplified by tow Darlington....
The TTY and the detector-transmitter unit are connected to separate phone jacks on the same line. When the ring sensor detects an incoming phone call, it activates the transmitter, which sends an RF signal to the receiver in the pager device. The receiver....
Im wiring up my 1964 xm and not sure where the wires go for the temp gauge on the back of the gauge theres an I S A the wore are Green/Black Red/White Yellow/Blue do you have any idea Thanks Haydon Ask-a-doc Web sites: If you`ve got a quick question, you can....
A simple and efficient 6 to 15V boost/stepup dc to dc converter based on IC L2585. This voltage converter circuit requires few external components....
Simple PWM lamp dimmer using NE555 timer IC. 555 timer IC wired as variable duty cycle astable multivibrator for controlling the brightness of the lamp....
This allows a TSCM specialist the ability to "blink" a Spectronics bugging device on for a second or two to detect it, and then to shut it back down before the eavesdropper catches on to the fact that his bugging device has just been caught. There is a small....
By making this RF amplifier small power transmitters of 200 mW, can be transformed into a power transmitters reasonable, ranging between 2 and 3 W. The circuit is very simple. Network output filter suppresses noise by at least 55 dB. Amplifier is suitable....
The Spartan-3 Primer board has external stepper motor interfacing, indicated as in Figure. Stepper Motor is driven by ULN2803A. It is a high-voltage, high-current Darlington transistor array. ULN2803 is used as a driver for port I/O lines, drivers output....
In this project you will build a coin toss circuit. It has three sections: a square-wave oscillator, a JK flip flop, and two LEDs (red & green). It uses CMOS digital ICs and MOSFET transistors. The schematic does not show the power and ground connections for....
The circuit uses the very popular Sharp IR module (Vishay module can also be used). The pin nos. shown in the circuit are for the Sharp & VIshay modules. For other modules please refer to their respective datasheets. The receiver consists of a 555 timer IC....
For this test you will need an analog (non-digital) voltmeter. Do NOT remove the distributor connector. Using small paper clips, insert them into the backside of the distributor wire harness connector to make contact with the terminals. Do NOT damage the....
