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Generating a Delayed Pulse Using The 555 Timer circuit – Circuit Schematic
Generating a Delayed Pulse Using The 555 Timer circuit
The circuit below illustrates generating a single positive pulse which is delayed relative to the trigger input time. The circuit is similar to the one above bu...
555 timer Mono stable (one shot) circuit circuit – Circuit Schematic
555 timer Mono stable (one shot) circuit circuit
The two circuits illustrate using the 555 timer to close a relay for a predetermined amount of time by pressing a momentary N/O push button. The circuit on the ...
28 LED Clock Timer circuit – Circuit Schematic
28 LED Clock Timer circuit
This is a programmable clock timer circuit that uses individual LEDs to indicate hours and minutes. 12 LEDs can be arranged in a circle to represent the 12 hour...
Repeating Interval Timer 2 – Circuit Schematic
Repeating Interval Timer 2
This is a simpler repeating timer circuit. It uses just one Cmos IC - wired as an asymmetric oscillator. The length of time the relay remains energized - and th...
Relay Toggle Circuit Using a 556 Timer circuit – Circuit Schematic
Relay Toggle Circuit Using a 556 Timer circuit
This toggle circuit operates by using a couple 555 timers wired as inverters. Pins 2 and 6 are the threshold and trigger inputs to the first timer and pin 5 is ...
Relay Toggle Circuit Using a 555 Timer circuit – Circuit Schematic
Relay Toggle Circuit Using a 555 Timer circuit
This 555 timer circuit toggles a relay when a button is pressed. Pins 2 and 6, the threshold and trigger inputs, are held at 1/2 the supply voltage by the two 1...
Simple optical switch circuit – Circuit Schematic
Simple optical switch circuit
The 555 is proved to be the most versatile and ubiquitous IC all over the world.This is a possible use: simple inverting schmitt trigger.....
Electronic Dice circuit – Circuit Schematic
Electronic Dice circuit
The IC1 is a 555 timer IC is connected for, Astable operation the clock pulses are fed to the IC2 via the 10K resistor. The IC2 is a 10 stage counter, output 6 ...
NE555 Basic Monostable – Circuit Schematic
NE555 Basic Monostable
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Digital Stopwatch 0-99sec – Circuit Schematic
Digital Stopwatch 0-99sec
We will describe the function of a digital stopwatch, 0 G 99 sec. The function of the stopwatch, relies in the use of 4 integrated circuits, which in this case ...
The counter – Circuit Schematic
The counter
The circuit of this device is quite simple: an input circuit filters the signal provided by the antenna to reduce sensibility to other phenomena and protects ag...
555 Timer as an A/D converter – Circuit Schematic
555 Timer as an A/D converter
The 555 timer will put out positive pulses. The pulse width is inversely proportional to the difference in voltage between the voltage at "ANALOG IN" and the vo...
Photo Timer Circuit Circuit – Circuit Schematic
Photo Timer Circuit Circuit
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Digital Stopwatch 0-60sec Circuit – Circuit Schematic
Digital Stopwatch 0-60sec Circuit
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28 LED Clock Timer Circuit – Circuit Schematic
28 LED Clock Timer Circuit
a programmable clock timer circuit that uses individual LEDs to indicate hours and minutes. 12 LEDs can be arranged in a circle to represent the 12 hours of a c...
Solid State Power Controller – Circuit Schematic
Solid State Power Controller
The circuit is built around two 555 timer ICs. U1 and U2. U1 is wired as a variable duty cycle oscillator with a constant time period of around 0. 1 second. Dut...
555 timer circuit diagram – Circuit Schematic
555 timer circuit diagram
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Digital Slave Flash Trigger PIC 12F675 – Circuit Schematic
Digital Slave Flash Trigger PIC 12F675
The Slave Flash Trigger is switched on/off by pressing the push button. When switched on, one to three flickers of the indicator lamp signalizes the programmed ...
555 Pulse generator – Circuit Schematic
555 Pulse generator
The first positive pulse from a classic 555-based oscillator is always 1. 6 times longer than the following pulses. The difference is caused by the fact that on...
Switch De-Bouncer Circuit – Circuit Schematic
Switch De-Bouncer Circuit
The 555 circuit can be re-triggered if the input is held low longer than the output pulse. To prevent this happening, I have included a further timing circuit c...