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:: Home » 555 Timer » Page 3

555 Timer

Make Police siren Generator circuits using 555 timer

Last Updated on: July 15, 2022 by Apichet Garaipoom
Make Police siren Generator circuits using 555 timer

This is police siren circuit using 555 IC, with PCB layout, using 2 IC-555 as frequency oscillators and transistor to drive sound to the speaker […] Read more

Categories 555 Timer Tags Alarm sounds, Sirens 13 Comments

555 timer Pulse Generator circuits | astable mode

Last Updated on: April 16, 2022 by Apichet Garaipoom
simple-pulse-generator-circuits-using-IC555

This is a simple pulse generator circuit or standard astable oscillator circuit for IC 555 timer,NE555N IC. Use for digital Logic circuit. Read more

Categories Oscillator circuits, 555 Timer Tags Pulse generator, Square wave oscillator 34 Comments

555 audio simple ohmmeter circuit

Last Updated on: June 20, 2022 by Apichet Garaipoom
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

Categories Meters & Detectors, 555 Timer Tags Electronic Test equipments Leave a comment

Three bounceless switch circuit using digital IC

Last Updated on: April 17, 2022 by Apichet Garaipoom
3 Simple Bounceless switch circuits 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

Categories Digitals & Microcontrollers, 555 Timer Tags IC-4011, IC-4049, Digital switch circuits 3 Comments

5 circuits of 555 Alarm sound and tone generator

Last Updated on: July 15, 2022 by Apichet Garaipoom
Simple 555 Alarm sound circuit

This is Simple 555 Alarm sound circuit, for beginner as buzzer sound. IC1 is pulse generator, to transistor PNP for boost current to speakers. Read more

Categories 555 Timer Tags Tone Generator 1 Comment
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