Top Circuits Page 225
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This circuit is a monostable multivibrator, or one-shot, made with a 555 timer chip. Click the logic input on the left (the "H"), and the output goes high for a short time, and then it goes low again. A timing interval starts when the trigger input ("tr") is....
-
-
-
It can be possible and it can be implemented using P-MOS and N-MOS together in a circuit i. e. what is called C-MOS. There we can implement Three Terminal NAND GATE. It is a universal gate which is used commonly so can proceed further...
-
-
This circuit is an astable multivibrator, or oscillator. The two transistors are cross-coupled in such a way that the circuit switches back and forth between two states. In one state, the base of Q1 is about one diode drop above ground, allowing a base....
-
This circuit is a bistable multivibrator, or flip-flop. Click on the "set" input at lower left to bring the output high (5V). Click on the "reset" input at lower right to bring the output low (ground). The transistors are cross-coupled in such a way that the....
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When the oscillator starts up, Q2 is conducting; the current comes from the capacitor, charging it until the voltage across it is large enough to get a current across the inductor. As the current across the inductor peaks, the output voltage rises (the....
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This circuit is an oscillator that generates a square wave. The op-amp starts with its two inputs in an unknown state; let`s say it starts with + slightly higher than. The op-amp greatly amplifies this difference, bringing its output to the op-amp`s positive....
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The second half of the circuit is an inverting integrator. The first op-amp starts with its two inputs in an unknown state; let`s say it starts with + slightly higher than (which is at ground). The op-amp greatly amplifies this difference, bringing its....
-
This example shows a tunnel diode used to make an oscillator. The two resistors bias the diode in its negative resistance region. As the current begins to flow through the inductor, the voltage across the tunnel diode increases until it hits the negative....
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This circuit is a voltage-controlled oscillator, which is an oscillator whose frequency is determined by a control voltage. A 10 Hz sawtooth oscillator provides the control voltage in this case; this causes the frequency to rise slowly until it hits a....
-
Battery Eliminators are the circuits, which creating DC power supply from AC Mains. Basically battery eliminator circuits are the compination of step down transformer, rectifier and voltage regulator. Here is a simple circuit of a Multipurpose Battery....
-
This is a simple and inexpensive clap operated switch, which uses only four transistors and resistor/capacitor network. The name of the project itself suggests its application. It can be used for level control in hydroculture project. Also for kitchen....
-
This is a very simple and inexpensive circuit uses an operational amplifier IC 741 (IC1) and push-pull amplifier using transistors for amplification of a signal. The name of the project it self suggests its application. It can be used for level control in....
-
The heart of the circuit is an IC4822 named as IC1. IC4822 is a programmed ROM, which generates 16 musical tunes when it gets triggered. The main feature of this IC is that it has inbuilt tone generator, rhythm generator, modulator, oscillator, frequency....
-
BPS Servo Controller -Digital is total metering and control solution for servo stabilizers for wide range of input voltage and wide range of load requirement. This reducesproduction overheads like wiring and testing and increases productionrate of the....
-
Already generated a voltage of 30 volts by using frequency generator and frequency to voltage converter, which stored in battery. Now I want to do inverter by taking 12v and convert it to 220v. What is the solution That`s a great idea and I`m also working on....
-
This article explains the construction and working of feedback oscillators with detailed description of Wien`s bridge oscillator and phase shift oscillator along with their circuit diagram, basic components and practical application Oscillators are those....
-
A complete description is given upon generation of required frequency by using phase shift method along with the advantages and limitation against Wien`s bridge method of oscillations. Complete circuitry of phase shift oscillator is illustrated to describe....
-
The simplest inverter to understand is the single-phase inverter, which takes a dc input voltage and converts it to single-phase ac voltage. The main components of the inverter can be either four silicon controlled rectifiers (SCRs) or four transistors. Fig.....
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The buck converter circuit is the basis for several other similar circuits called forward converters. The buck converter circuit and the input and output voltages for this circuit are shown in Fig. 1. This circuit would be connected directly after the power....
-
Construct universal power supplies, including: Low-voltage power supplies for operating electronic equipment are in the next section. There you`ll find designs for single- and dual-voltage regulated supplies, including an all-purpose adjustable version and....
-
Note the incoming ac routed to the primary terminals on a 12. 6-volt transformer. The hot side of the ac is connected through a fuse and a single-pole single-throw (SPST) toggle switch. With the switch in the OFF (open) position, the transformer receives....
-
Because light is at such a high frequency in the electromagnetic spectrum, it`s an even better medium for communications than radio waves. Lasers are perfect instruments for communications links because they emit a powerful, slender beam that`s least....
-
The last section presented a number of basic free-air laser light communications projects. You learned how to modulate a He-Ne laser beam using a transformer, transistor, and even a piece of Mylar foil stretched in a needlepoint hoop. You also learned....
-
Michelson was the inventor of a unique interferometer that opened up new vistas in the science of light and optics. With the interferometer, Michelson was able to determine ” with unprecedented accuracy ” the speed of light, the wavelength and frequency of....
-
-
Circuit bellow shows about LM741 IC for Light Dark Sensor Circuit diagram. This circuit have a many features, among others: 1 Watt LED spotlight, advantageous and able in a advanced ambit of renewable activity projects from automated lighting to aegis....
-
The basic techniques of designing electro-mechanical systems and to gain the knowledge on tuning and controlling dynamic systems. The design of this course should attract special interests of many universities becauseit actually requires students to build....
-
This device and all information contained on this website is for educational purposes only. This device must be used in conjunction with any and all local, provincial and federal laws. It is up to the end user to comply with all legal guidelines, thus we are....
-
This device and all information contained on this website is for educational purposes only. This device must be used in conjunction with any and all local, provincial and federal laws. It is up to the end user to comply with all legal guidelines, thus we are....
-
-
TLD 5085EJ is a smart LED buck converter with an integrated power switch capable of driving up to 1. 8A load current with excellent line and load regulation. This device is primarily aimed at stepping down input voltage and regulating a constant LED current.....
-
The QT113 is a capacitance touch sensor. Unlike many touch sensors, it does not rely on AC line voltage to be present in the room. Instead, it detects the change in capacitance the closeness of your body produces. A 2" square sensor plate can detect the....
-
CRTGND is not the same as GND, CRTGND connects to the mostfet drain/schottky diode. There is a downside to this circuit which is that there is a voltage drop when running from the USB side due to the diode. The USB voltage can vary between 4. 75V to 5. 25V....
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Combine the SATL and SAVL together. The schematic was updated with the voltage sensing circuit, I added in a Mosfet so that we only draw power from the voltage source when needed and you`ll notice there are 2 jumpersTemp and Volt. You can switch between....
-
The Excelitas TPS 1T 0134 OAA060 thermopile sensor is a self-contained module with a built-in op amp. (We use the A2TPMI 334 OAA 60 designation in this document because that was the PerkinElmer part number when we purchased them. Since then, PerkinElmer`s....
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Unless you can get a custom made transformer your circuit design is ruled by the transformer available to you, if the primary winding is not center taped you are limited to an AB driver. The only transformer you can play with is a center tap primary, if the....
-
A simple buzzer to convert to an oscillating buzzer so as to obtain the sound similar to that of an automobile`s reverse indicator. I`ve posted a schematic(borrowed from electroschematics. com) below. I intent to replace the LED with my buzzer and omit the....
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I have two ICM7555 CMOS 555 timers, and I was wondering if anyone has any good am radio transmitter circuits that incorporate two (or one!) 555 timers....
-
Hello, i want to make a simple active mixer to place in front of the power amp. I read some documents about active op-amp mixer.And they said : Any....
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I have a small scroll saw i would like to build a cheap speed controler for It uses an AC motor which appears to be brushless when i dismantled it C....
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I want to make a simple circuit with a microphone that just takes your voice and sends it to a speaker. I just want to understand how to hook up a mic....
-
I have a portable 50W light that is run off a 12V 7Ah battery. In some cases the light is too bright so i was wondering what parts i would need to mak....
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I have it set up so that I get an out put signal that goes High for about 1/2 second, and then goes low for about 1.33 seconds. The problem is that....
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From what I understand, an SCR is like a diode that can either be turned on to act like an everyday diode, and it will only turn back off when the power is cut. With this understanding, will this circuit work if not, can you explain even if itdoesn`twork as....
-
I built this circuit from the led beating heart frame instructable. I can`t seem to get it to work. Any ideas? I also built this led sequencer. It doe....
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Well, I try to follow an instructable for quiet a while now, but I still couldn`t understand its schematic.. its not that I don`t know what the symbo....
-
LEDs are rated at only 30 mA continuous, whereas this circuit runs them at around 50 mA. Not a problem for a low duty cycle with short pulses, but this circuit as you intend has a high duty cycle. Where you might run into a problem is that you`re right at....
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Hello. im going to make this mixer circuit.Im not sure if it work fine or not.Can you please check it for me ? Thank! In this schematic, i use R1=R2....
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I am attempting to build a distortion circuit using 1 12AU7 tube as a diode. I know that the circuit is primitive but really its only to add in the ex....
-
This is VERY illegal. As a consumer, you MUST comply with part 15 of the rules and regulations. Part 15 states that your device must accept any interference received, and it cannot cause any harmful interference. (Such as jamming an FM signal. ) It is even....
-
TL072 is amplifying an audio signal which is going to speakers & arduino analog input. Amp is powered by a wall wart with 12V 2A output. The same 12V is also regulated to 5V and used to power an AVR. The AVR is being used to PWM, using a power....
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I`ve decided on a project for the new year that is ~~less likely to lead to sterilization~~ better than my old project (which was a homebrew x-ray mac....
-
A touch switch for a USB powered desk lamp, and the touch switch isn`t working. The circuit diagram, layout and pictures are below. I used the circuits from the following two websites to design the circuit: the 4th circuit. I`ve joined the output of the....
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240/24Vac(rms) transformer was used. After rectification and filtration i got about 30Vdc. Therefore the transformer and diode rating should be well chosen to meet your demand At the current limiting stage, transistor U1, Q1 and resistor R1 plays the vital....
-
The schematic circuit design is for a 250 watt output, while the pics are of my 1500 watts inverter that i built, to increase the power of the circuit you have to add more of the Q7 and Q8 transistors in parallel, each pair you add will increase your power....
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-
I made this as a quick project I made to use a lot of the LEDs I recently got. It basically connects via a 555 8 pin IC and allows for adjusting the t....
-
Here`s a simple 433.92 MHz short range radio beacon that may be handy for locating downed R/C planes, lost ballons, model rockets - or perhaps hidden....
-
As I described in the last step, setting the 555 timer up in astable mode causes it to output a continuous series of pulses. In this circuit, I`ll se....
-
The schematic diagram of this robot is very simple to understand. As I had mentioned earlier I just modified a circuit from on of the books to create....
-
The schematic that this is based on is my own, so it is free from Intellectual property restrictions. It is based around a 555 timer (so it could be an extension of the recent "Know Your 555 timer" article), and uses an ubiquitous LM386 audio amp so it can....
-
I love the Arduino as a simple and accessible controller platform for many varied projects. A few months ago, a purchased an Ethernet shield for my A....
-
For relatively small (less number of pins than ATmega328) projects, ATtiny series, ATtiny45 or Attiny85 are good choice in terms of its physical size....
-
The Arduino site has thorough documentation on how to connect LEDS to the Arduino via the Max7221. For this, you will need this subset of ingredients....
-
Above is the schematic of one oscillator circuit. In technical terms the oscillator is a Schmitt trigger relaxation oscillator. Above you`ll also find....
-
Here is a small device for HAM amateurs, how using powerpole connectors to connect ham gear to unknown power supply with powerpole connector. But you....
-
Generate sound or output analog voltages with an Arduino. This Instructable will show you how to set up a really basic digital to analog converter so....
-
Ever wanted your home entertainment or sound system to power up itself when plugging in your iPod or other portable MP3 player? Watch this video to s....
-
Start to build the circuit as pictured in the schematic. To see the schematic larger, click the little i in the upper right-hand corner of the image....
-
This Arduino-powered vocal effects box pitch shifts and distorts incoming audio signals to produce a wide variety of vocal effects. This project is my first experiment with real-time digital signal processing using Arduino. It samples an incoming microphone....
-
I`ve broken the schematic into three parts so it is easier to understand. The first schematic shows the audio out circuit. This project outputs audio....
-
This instructable will show you how to make an audio modulated plasma speaker using a flyback transformer out of an old CRT display, and the all time....
-
Microcontrollers (MCUs) are fantastic little ICs that give an extra element of versatility to your electronics, robotics or other project. But they`re....
-
If you want to make an ultra-multipurpose, generic microcontroller board, then what I`ve covered already is enough. It`s the bare basics that will get....
-
This is the circuit that I designed for this project. To power this project, I am using a 6V 400 mA DC power supply. Its open-circuit voltage (no load....
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To control the motor, i will be using an H-bridge with a DPDT relay like you can see on this schematic below. If you want more details, look on this....
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The figures above shows the basic idea of any robot, where we have some inputs and output devices connected to the brain and some outputs controlled b....
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For the Circuit diagram M1 connected to Coil A for stepper motor. M2 connected to Coil B for stepper motor. R1 & R2 1 Ohm resistors for current limiti....
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This is a fairly simple project for anyone with some electronic skills. Plug this circuit into an audio source and the LEDs will blink to the rhythm o....
-
The 555 timer. A chip so versatile that it has been used in everything from toys to spacecraft. A chip that can act as an oscillator, a schmitt trigge....
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Have a water tank you want to measure or a dam or a gate Want to detect a car coming down the drive but don`t want to string wires through the garden This instructable shows how to send data 500 metres with 100% reliability using picaxe microcontroller chips....
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Perhaps the trickiest part in building a solid state tesla coil is the bridge or switching circuit. The bridge switching circuit is the heart of t....
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With just a few parts from old microwave ovens, TV sets, and an oil burner, you can build an affordable instrument for whatever you wish to snap, crackle, or pop! The key component is the voltage multiplier, which I covered in the High Voltage Multiplier....
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This is my first Instructable and my first attempt at such a large electronics project. I designed the circuit from scratch and I am making it availa....
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Make sure to double-check your connections using the circuit diagram and breadboard schematic (download from these links). You can use this while you....
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The next counter section works the same way but is set up to count 4 quarters, single $1 (loonies) and single $2 (toonies). The toonies circuit is set....
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The outputs of all coin counters are summed in a 74LS126 tri-state buffer which is used so that all the counter outputs can be connected to the input....
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The circuit schematic is straightforward, I`ll not try to give information about assembling and testing circuits, there should be lots of instructable....
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!This instructable is meant to give detailed instructions on building a solid state tesla coil based off of steve ward`s mini sstc schematic. Ok, here....
This circuit is a monostable multivibrator, or one-shot, made with a 555 timer chip. Click the logic input on the left (the "H"), and the output goes high for a short time, and then it goes low again. A timing interval starts when the trigger input ("tr") is....
It can be possible and it can be implemented using P-MOS and N-MOS together in a circuit i. e. what is called C-MOS. There we can implement Three Terminal NAND GATE. It is a universal gate which is used commonly so can proceed further...
This circuit is an astable multivibrator, or oscillator. The two transistors are cross-coupled in such a way that the circuit switches back and forth between two states. In one state, the base of Q1 is about one diode drop above ground, allowing a base....
This circuit is a bistable multivibrator, or flip-flop. Click on the "set" input at lower left to bring the output high (5V). Click on the "reset" input at lower right to bring the output low (ground). The transistors are cross-coupled in such a way that the....
When the oscillator starts up, Q2 is conducting; the current comes from the capacitor, charging it until the voltage across it is large enough to get a current across the inductor. As the current across the inductor peaks, the output voltage rises (the....
This circuit is an oscillator that generates a square wave. The op-amp starts with its two inputs in an unknown state; let`s say it starts with + slightly higher than. The op-amp greatly amplifies this difference, bringing its output to the op-amp`s positive....
The second half of the circuit is an inverting integrator. The first op-amp starts with its two inputs in an unknown state; let`s say it starts with + slightly higher than (which is at ground). The op-amp greatly amplifies this difference, bringing its....
This example shows a tunnel diode used to make an oscillator. The two resistors bias the diode in its negative resistance region. As the current begins to flow through the inductor, the voltage across the tunnel diode increases until it hits the negative....
This circuit is a voltage-controlled oscillator, which is an oscillator whose frequency is determined by a control voltage. A 10 Hz sawtooth oscillator provides the control voltage in this case; this causes the frequency to rise slowly until it hits a....
Battery Eliminators are the circuits, which creating DC power supply from AC Mains. Basically battery eliminator circuits are the compination of step down transformer, rectifier and voltage regulator. Here is a simple circuit of a Multipurpose Battery....
This is a simple and inexpensive clap operated switch, which uses only four transistors and resistor/capacitor network. The name of the project itself suggests its application. It can be used for level control in hydroculture project. Also for kitchen....
This is a very simple and inexpensive circuit uses an operational amplifier IC 741 (IC1) and push-pull amplifier using transistors for amplification of a signal. The name of the project it self suggests its application. It can be used for level control in....
The heart of the circuit is an IC4822 named as IC1. IC4822 is a programmed ROM, which generates 16 musical tunes when it gets triggered. The main feature of this IC is that it has inbuilt tone generator, rhythm generator, modulator, oscillator, frequency....
BPS Servo Controller -Digital is total metering and control solution for servo stabilizers for wide range of input voltage and wide range of load requirement. This reducesproduction overheads like wiring and testing and increases productionrate of the....
Already generated a voltage of 30 volts by using frequency generator and frequency to voltage converter, which stored in battery. Now I want to do inverter by taking 12v and convert it to 220v. What is the solution That`s a great idea and I`m also working on....
This article explains the construction and working of feedback oscillators with detailed description of Wien`s bridge oscillator and phase shift oscillator along with their circuit diagram, basic components and practical application Oscillators are those....
A complete description is given upon generation of required frequency by using phase shift method along with the advantages and limitation against Wien`s bridge method of oscillations. Complete circuitry of phase shift oscillator is illustrated to describe....
The simplest inverter to understand is the single-phase inverter, which takes a dc input voltage and converts it to single-phase ac voltage. The main components of the inverter can be either four silicon controlled rectifiers (SCRs) or four transistors. Fig.....
The buck converter circuit is the basis for several other similar circuits called forward converters. The buck converter circuit and the input and output voltages for this circuit are shown in Fig. 1. This circuit would be connected directly after the power....
Construct universal power supplies, including: Low-voltage power supplies for operating electronic equipment are in the next section. There you`ll find designs for single- and dual-voltage regulated supplies, including an all-purpose adjustable version and....
Note the incoming ac routed to the primary terminals on a 12. 6-volt transformer. The hot side of the ac is connected through a fuse and a single-pole single-throw (SPST) toggle switch. With the switch in the OFF (open) position, the transformer receives....
Because light is at such a high frequency in the electromagnetic spectrum, it`s an even better medium for communications than radio waves. Lasers are perfect instruments for communications links because they emit a powerful, slender beam that`s least....
The last section presented a number of basic free-air laser light communications projects. You learned how to modulate a He-Ne laser beam using a transformer, transistor, and even a piece of Mylar foil stretched in a needlepoint hoop. You also learned....
Michelson was the inventor of a unique interferometer that opened up new vistas in the science of light and optics. With the interferometer, Michelson was able to determine ” with unprecedented accuracy ” the speed of light, the wavelength and frequency of....
Circuit bellow shows about LM741 IC for Light Dark Sensor Circuit diagram. This circuit have a many features, among others: 1 Watt LED spotlight, advantageous and able in a advanced ambit of renewable activity projects from automated lighting to aegis....
The basic techniques of designing electro-mechanical systems and to gain the knowledge on tuning and controlling dynamic systems. The design of this course should attract special interests of many universities becauseit actually requires students to build....
This device and all information contained on this website is for educational purposes only. This device must be used in conjunction with any and all local, provincial and federal laws. It is up to the end user to comply with all legal guidelines, thus we are....
This device and all information contained on this website is for educational purposes only. This device must be used in conjunction with any and all local, provincial and federal laws. It is up to the end user to comply with all legal guidelines, thus we are....
TLD 5085EJ is a smart LED buck converter with an integrated power switch capable of driving up to 1. 8A load current with excellent line and load regulation. This device is primarily aimed at stepping down input voltage and regulating a constant LED current.....
The QT113 is a capacitance touch sensor. Unlike many touch sensors, it does not rely on AC line voltage to be present in the room. Instead, it detects the change in capacitance the closeness of your body produces. A 2" square sensor plate can detect the....
CRTGND is not the same as GND, CRTGND connects to the mostfet drain/schottky diode. There is a downside to this circuit which is that there is a voltage drop when running from the USB side due to the diode. The USB voltage can vary between 4. 75V to 5. 25V....
Combine the SATL and SAVL together. The schematic was updated with the voltage sensing circuit, I added in a Mosfet so that we only draw power from the voltage source when needed and you`ll notice there are 2 jumpersTemp and Volt. You can switch between....
The Excelitas TPS 1T 0134 OAA060 thermopile sensor is a self-contained module with a built-in op amp. (We use the A2TPMI 334 OAA 60 designation in this document because that was the PerkinElmer part number when we purchased them. Since then, PerkinElmer`s....
Unless you can get a custom made transformer your circuit design is ruled by the transformer available to you, if the primary winding is not center taped you are limited to an AB driver. The only transformer you can play with is a center tap primary, if the....
A simple buzzer to convert to an oscillating buzzer so as to obtain the sound similar to that of an automobile`s reverse indicator. I`ve posted a schematic(borrowed from electroschematics. com) below. I intent to replace the LED with my buzzer and omit the....
I have two ICM7555 CMOS 555 timers, and I was wondering if anyone has any good am radio transmitter circuits that incorporate two (or one!) 555 timers....
Hello, i want to make a simple active mixer to place in front of the power amp. I read some documents about active op-amp mixer.And they said : Any....
I have a small scroll saw i would like to build a cheap speed controler for It uses an AC motor which appears to be brushless when i dismantled it C....
I want to make a simple circuit with a microphone that just takes your voice and sends it to a speaker. I just want to understand how to hook up a mic....
I have a portable 50W light that is run off a 12V 7Ah battery. In some cases the light is too bright so i was wondering what parts i would need to mak....
I have it set up so that I get an out put signal that goes High for about 1/2 second, and then goes low for about 1.33 seconds. The problem is that....
From what I understand, an SCR is like a diode that can either be turned on to act like an everyday diode, and it will only turn back off when the power is cut. With this understanding, will this circuit work if not, can you explain even if itdoesn`twork as....
I built this circuit from the led beating heart frame instructable. I can`t seem to get it to work. Any ideas? I also built this led sequencer. It doe....
Well, I try to follow an instructable for quiet a while now, but I still couldn`t understand its schematic.. its not that I don`t know what the symbo....
LEDs are rated at only 30 mA continuous, whereas this circuit runs them at around 50 mA. Not a problem for a low duty cycle with short pulses, but this circuit as you intend has a high duty cycle. Where you might run into a problem is that you`re right at....
Hello. im going to make this mixer circuit.Im not sure if it work fine or not.Can you please check it for me ? Thank! In this schematic, i use R1=R2....
I am attempting to build a distortion circuit using 1 12AU7 tube as a diode. I know that the circuit is primitive but really its only to add in the ex....
This is VERY illegal. As a consumer, you MUST comply with part 15 of the rules and regulations. Part 15 states that your device must accept any interference received, and it cannot cause any harmful interference. (Such as jamming an FM signal. ) It is even....
TL072 is amplifying an audio signal which is going to speakers & arduino analog input. Amp is powered by a wall wart with 12V 2A output. The same 12V is also regulated to 5V and used to power an AVR. The AVR is being used to PWM, using a power....
I`ve decided on a project for the new year that is ~~less likely to lead to sterilization~~ better than my old project (which was a homebrew x-ray mac....
A touch switch for a USB powered desk lamp, and the touch switch isn`t working. The circuit diagram, layout and pictures are below. I used the circuits from the following two websites to design the circuit: the 4th circuit. I`ve joined the output of the....
240/24Vac(rms) transformer was used. After rectification and filtration i got about 30Vdc. Therefore the transformer and diode rating should be well chosen to meet your demand At the current limiting stage, transistor U1, Q1 and resistor R1 plays the vital....
The schematic circuit design is for a 250 watt output, while the pics are of my 1500 watts inverter that i built, to increase the power of the circuit you have to add more of the Q7 and Q8 transistors in parallel, each pair you add will increase your power....
I made this as a quick project I made to use a lot of the LEDs I recently got. It basically connects via a 555 8 pin IC and allows for adjusting the t....
Here`s a simple 433.92 MHz short range radio beacon that may be handy for locating downed R/C planes, lost ballons, model rockets - or perhaps hidden....
As I described in the last step, setting the 555 timer up in astable mode causes it to output a continuous series of pulses. In this circuit, I`ll se....
The schematic diagram of this robot is very simple to understand. As I had mentioned earlier I just modified a circuit from on of the books to create....
The schematic that this is based on is my own, so it is free from Intellectual property restrictions. It is based around a 555 timer (so it could be an extension of the recent "Know Your 555 timer" article), and uses an ubiquitous LM386 audio amp so it can....
I love the Arduino as a simple and accessible controller platform for many varied projects. A few months ago, a purchased an Ethernet shield for my A....
For relatively small (less number of pins than ATmega328) projects, ATtiny series, ATtiny45 or Attiny85 are good choice in terms of its physical size....
The Arduino site has thorough documentation on how to connect LEDS to the Arduino via the Max7221. For this, you will need this subset of ingredients....
Above is the schematic of one oscillator circuit. In technical terms the oscillator is a Schmitt trigger relaxation oscillator. Above you`ll also find....
Here is a small device for HAM amateurs, how using powerpole connectors to connect ham gear to unknown power supply with powerpole connector. But you....
Generate sound or output analog voltages with an Arduino. This Instructable will show you how to set up a really basic digital to analog converter so....
Ever wanted your home entertainment or sound system to power up itself when plugging in your iPod or other portable MP3 player? Watch this video to s....
Start to build the circuit as pictured in the schematic. To see the schematic larger, click the little i in the upper right-hand corner of the image....
This Arduino-powered vocal effects box pitch shifts and distorts incoming audio signals to produce a wide variety of vocal effects. This project is my first experiment with real-time digital signal processing using Arduino. It samples an incoming microphone....
I`ve broken the schematic into three parts so it is easier to understand. The first schematic shows the audio out circuit. This project outputs audio....
This instructable will show you how to make an audio modulated plasma speaker using a flyback transformer out of an old CRT display, and the all time....
Microcontrollers (MCUs) are fantastic little ICs that give an extra element of versatility to your electronics, robotics or other project. But they`re....
If you want to make an ultra-multipurpose, generic microcontroller board, then what I`ve covered already is enough. It`s the bare basics that will get....
This is the circuit that I designed for this project. To power this project, I am using a 6V 400 mA DC power supply. Its open-circuit voltage (no load....
To control the motor, i will be using an H-bridge with a DPDT relay like you can see on this schematic below. If you want more details, look on this....
The figures above shows the basic idea of any robot, where we have some inputs and output devices connected to the brain and some outputs controlled b....
For the Circuit diagram M1 connected to Coil A for stepper motor. M2 connected to Coil B for stepper motor. R1 & R2 1 Ohm resistors for current limiti....
This is a fairly simple project for anyone with some electronic skills. Plug this circuit into an audio source and the LEDs will blink to the rhythm o....
The 555 timer. A chip so versatile that it has been used in everything from toys to spacecraft. A chip that can act as an oscillator, a schmitt trigge....
Have a water tank you want to measure or a dam or a gate Want to detect a car coming down the drive but don`t want to string wires through the garden This instructable shows how to send data 500 metres with 100% reliability using picaxe microcontroller chips....
Perhaps the trickiest part in building a solid state tesla coil is the bridge or switching circuit. The bridge switching circuit is the heart of t....
With just a few parts from old microwave ovens, TV sets, and an oil burner, you can build an affordable instrument for whatever you wish to snap, crackle, or pop! The key component is the voltage multiplier, which I covered in the High Voltage Multiplier....
This is my first Instructable and my first attempt at such a large electronics project. I designed the circuit from scratch and I am making it availa....
Make sure to double-check your connections using the circuit diagram and breadboard schematic (download from these links). You can use this while you....
The next counter section works the same way but is set up to count 4 quarters, single $1 (loonies) and single $2 (toonies). The toonies circuit is set....
The outputs of all coin counters are summed in a 74LS126 tri-state buffer which is used so that all the counter outputs can be connected to the input....
The circuit schematic is straightforward, I`ll not try to give information about assembling and testing circuits, there should be lots of instructable....
!This instructable is meant to give detailed instructions on building a solid state tesla coil based off of steve ward`s mini sstc schematic. Ok, here....
