2 Simple Buzzer Circuit
This buzzer circuit is simple, small, cheap, and requires 3V to 12V. It only uses transistors, piezo or small speaker, and a few components. Read more
Mosquito repellent circuit project
The mosquito repellent circuit to generates small sound frequency using transistors as bistable multivibrator. It is economical, safer than using chemicals. Read more
Transistor Relay driver circuit in digital
How to control a load with a digital circuit like Arduino? A transistor relay circuit may be answered for you. The output pulse from the digital circuit to biased the transistor is ON. Then, it drives the relay as a switch ON-OFF. To power to any circuits or external devices. Basic Application Relay The Controlling … Read more
4 Home disco light circuits using SCR-555-4017
This is a cheap home disco lights circuit. Friends like listening to Rock music,would like these circuits. It enhances your music listening more colorful. […] Read more
