LED Chaser circuit using 4017 and 555
If you want to build a 10 LED Chaser circuit we suggest this circuit first. It uses popular IC is a simple and affordable IC-4017_decade counter and IC 555 […] Read more
555 Timer
Monostable multivibrator using 555 timer
These are many Monostable multivibrator using 555 timer. We use it as timer for control a load, LEDs,driver relay. Which trigger them using a normal switch. […] Read more
3 Police siren circuits using 555 timer
Here are police siren circuit using IC 555 with PCB layout. It uses IC 555s as a frequency generator and a transistor to drive the speaker. Read more
555 audio simple ohmmeter circuit
This is 555 audio simple ohmmeter circuit. Some times, we need to measure roughly resistances only. we can know resistances by audio also fast check. […] Read more
Three bounceless switch circuit using digital IC
The simple bounceless switch circuit. It is one kind of electronic switches, high quality, and low noise. They are suitable for the digital circuits. Why? Read more