First of all, continuity testing is very important in electronics work, as it helps to find broken wires easily and it also helps to check PCB tracks. Sometimes wires look good but contain internal breaks, so technicians use a continuity tester to check them, hence, this simple Continuity Tester Circuit using an Op-Amp uses an […]
DIY Projects
Transistor Based Water Level Alarm Circuit
Sometimes the water tank becomes full, but we forget to switch OFF the motor, as a result, the system wastes water; so, this simple Transistor Based Water Level Alarm Circuit is useful, as it gives sound alert when water reaches a level. Moreover, the circuit is cheap and easy to build as it uses very […]
Digital Code Lock Circuit using IC 4017
Security plays a very important role in todays world, therefore electronic code locks are very useful, as this Digital Code Lock Circuit using IC 4017 is a simple; as it uses push buttons, diodes, resistors, capacitor and IC CD 4017 . Moreover, this low cost circuit is easy to build, operates from a 9 V […]
Automatic Solar LED Light Circuit
Solar power is free energy and it comes from the sun, it is clean and is renewable, because of this solar lights are very popular today; also this is Automatic Solar LED Light Circuit and it turns ON light at night, and it turns OFF light at day automatically. This circuit requires no switch, making […]
Transistor Based LED Chasing Flashing Circuit
Building a transistor-based LED chasing flashing circuit is a simple and interesting project, as this circuit switches LEDs ON and OFF sequentially to create a chasing effect, which gives it the name “chaser circuit This circuit uses simple transistors instead of ICs, making it easy for beginners to learn, it is suitable for learning and […]
Automatic PIR Motion Sensor Light Circuit
This project explains about a complete Automatic PIR Motion Sensor Light Circuit, it is very useful for home and outdoor lighting, because the circuit uses a PIR sensor. Whenever the PIR sensor detects motion, it turns the light ON automatically and after a preset delay, it turns the light OFF, saving power and reducing human […]