Donkey sound effect Circuit using IC-555
This is a donkey sound effect project that easy to builds because use simple components include three IC-555 and LM386 and more little parts. Although at present we use Micro controller IC because small. But some times it is hard to find, so this circuit is suitable for everyone. How …
Power Battery Saver Circuit
This is power battery saver circuit using IC-555 timer. The lamp is controlled with PWM model by adjusting of potentiometer P1. PNP power transistor to driver lamp. When use normal lamp,some times a lamp that is used have too bright. To adjust the brightness with the variable resistor, it would …
Simple 555 ICs tester circuit
Most IC-555 is used to generate frequency, and sometimes we need to know. Is it good or bad? But normal multimeter cannot check it. Thus, I make a simple 555 ICs tester circuit. Which is tested correctly and faster. How it works Resistors R1-R3 acts as limit current and reduce …