What would you like to build?
Search Arduino, ESP32, circuits, amplifiers and more.
Ideas become circuits.
Circuits become projects.
Practical Arduino, ESP32 and electronics tutorials. Explore real projects, learn how circuits work and build something extraordinary.

Slim 64 × 16 cm Electronic Cricket Scoreboard
Slim 64 × 16 cm electronic cricket scoreboard displaying Runs, Wickets and Overs in rotation with remote and browser control.
Explore this project →Choose your next build
Tag: Astable
11 articles

Remote operated musical bell
Remote operated musical bell can be made combining the following circuits. a) Remote tester b) Basic RC circuit c) Simple Musical bell When a...
Read tutorial ↗
Astable mode of 555 timer
Practical electronics projects and step-by-step guidance for makers.
Read tutorial ↗
FREE 555 timer simulators for electronics beginners
Practical electronics projects and step-by-step guidance for makers.
Read tutorial ↗
Light activated police siren using 555 timer and light dependent resistor(LDR)
Practical electronics projects and step-by-step guidance for makers.
Read tutorial ↗
How to use an electret microphone
Practical electronics projects and step-by-step guidance for makers.
Read tutorial ↗
Digital Object Counter using LDR and digital IC
555 timer configured in monostable mode is a simple automatic dark sensor circuit that gives output when light falling on LDR is blocked.
Read tutorial ↗
Mode of NE555- Astable
This circuit has been configured in Astable mode. The output pulses are determined by the values of resistors R1, R2 and the timing capacitor C1....
Read tutorial ↗
Sound generator and Musical toy organ
One of the main objectives of LDR Engineering projects is to make students capable of developing their own logic for making devices. Here is an...
Read tutorial ↗
Toggle switch
This 555 timer circuit below toggles the LED when a button is pressed. Pins 2 and 6, the threshold and trigger inputs, are held at 1/2 the supply...
Read tutorial ↗
Mode of NE555- Monostable
Monostable mode of operation Monostable mode of operation of 555 IC can be explained using a simple touch sensitive circuit. Here, timing constant...
Read tutorial ↗
Mode of NE555- Astable
This circuit has been configured in Astable mode. The output pulses are determined by the values of resistors R1, R2 and the timing capacitor C1....
Read tutorial ↗