555 Timer Archives | Page 4 of 6

LED Light Sequencer Circuits

Last Updated on: February 17, 2025 by Apichet Garaipoom

Here are LED light sequencer circuit that using IC-4017 and IC-555. Read more

LED Chaser circuit using 4017 and 555

Last Updated on: March 19, 2025 by Apichet Garaipoom

LED Chaser circuits using IC 4017 + IC 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

Monostable multivibrator using 555 timer

Last Updated on: December 11, 2024 by Apichet Garaipoom

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

Last Updated on: March 22, 2025 by Apichet Garaipoom

Make Police siren Generator 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

Last Updated on: June 20, 2022 by Apichet Garaipoom

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