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Digital counter demonstration circuit – Circuit Schematic
Digital counter demonstration circuit
555 timer is used as clock to drive RS7490 decimal timer, BCD output to 7 section LED. To adjust R1 can change the clock frequency.....
Digital counter demonstration circuit – Circuit Schematic
Digital counter demonstration circuit
555 timer is used as clock to drive RS7490 decimal timer, BCD output to 7 section LED. To adjust R1 can change the clock frequency.....
Electronic Digital Clock circuit – Circuit Schematic
Electronic Digital Clock circuit
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Electronic Digital Clock circuit – Circuit Schematic
Electronic Digital Clock circuit
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Camera external shutter circuit 555 timer – Circuit Schematic
Camera external shutter circuit 555 timer
Having wired the camera with external shutter leads I now needed a way to trip them. They needed to be tripped (i. e. connected together via a relay) at a regul...
Camera external shutter circuit 555 timer – Circuit Schematic
Camera external shutter circuit 555 timer
Having wired the camera with external shutter leads I now needed a way to trip them. They needed to be tripped (i. e. connected together via a relay) at a regul...
Beeping Down Counter Circuit – Circuit Schematic
Beeping Down Counter Circuit
The schematic for this project isn`t too, too bad to look at even though it`s not the best drawing/layout for a schematic that I`ve ever done. The basic flow is...
Voltage Controlled PWM Generator – Circuit Schematic
Voltage Controlled PWM Generator
Circuits that generates PWM pulses. Most of them will translate a resistor value into duty cycle change. Although that is handy and easy, sometimes a voltage co...
rc triggering circuit – Circuit Schematic
rc triggering circuit
Diagram shows an R-C-Diode circuit giving full half-cycle control (180 electrical degrees). On the positive half-cycle of SCR anode voltage the capacitor charge...
triggering circuit – Circuit Schematic
triggering circuit
Simple resistor, diode combinations trigger and control SCRs over the full 180 electrical degree range, performing well at commercial temperatures. These types ...
Device that it is self-running – Circuit Schematic
Device that it is self-running
If the input is coming from, say, a Function Generator`s typical output clipleads, then the "black" lead or "-" or "ground" is connected to the circuit`s ground...
555 Timer LED Flasher Circuit – Circuit Schematic
555 Timer LED Flasher Circuit
All of the parts in this list are generally available through Radioshack for less than $20. I highly recommend using breadboard! You`re bound to make mistakes y...
PA Time sequencer – Circuit Schematic
PA Time sequencer
The next job is the LNA transistor replacement, but the trouble is repeated already within next contest. Such problem is usually result of unsuitable time seque...
monitor an input pulse train – Circuit Schematic
monitor an input pulse train
This circuit is a missing pulse detector. It is used in the_ General Purpose Controller Board with Basic Stamp 1. This circuit is used to monitor an input pulse...
Nixie Clock 2 – Circuit Schematic
Nixie Clock 2
The clock is constructed on two boards; one carries the HT generator and the processor logic, the other the tubes. Thisallows a slightly more compact design tha...
Simple NE555 IC Testing Circuit – Circuit Schematic
Simple NE555 IC Testing Circuit
Ne555 is one of the most commonly used timer IC. It is a monolithic timing circuit that can produce accurate and highly stable time delays or oscillations. Like...
intermittetly pulse generator – Circuit Schematic
intermittetly pulse generator
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Hydrogen Generator 555 Timer Pulse Width Modulation Circuit – Circuit Schematic
Hydrogen Generator 555 Timer Pulse Width Modulation Circuit
How to Make a Hydrogen Generator 555 Timer Circuit PWM. This Pulse Width Modulation (PWM) Circuit could Produce Hydrogen on Demand.....
Stereo Digital Camera Power-up Pulse Generator – Circuit Schematic
Stereo Digital Camera Power-up Pulse Generator
Powering up my twin digital Sony DSC-V1 cameras at exactly the same time frequently synchronizes the cameras to a remarkable degree, within milliseconds. The ca...
PWM power controller – Circuit Schematic
PWM power controller
This circuit uses a 555 timer to generate a sawtooth voltage waveform across a capacitor, then compares that signal against a steady voltage provided by a poten...