In my previous article for Switch Selectable Four Frequency Pulse Generator Circuit i selected the frequency using manual switches; however, this circuit replaces manual switching with electronic switching by using the CD4066B quad bilateral switch, which the 555 timer controls automatically. The CD4066 is a quad bilateral switch IC that contains four independent analog switches […]
555 Timer Projects
Switch Selectable Four Frequency Pulse Generator Circuit
This Switch Selectable Four Frequency Pulse Generator Circuit is a simple astable oscillator that uses the popular 555 timer IC in astable mode and also users can change the output frequency in four steps by pressing the switch to select different capacitors. Here, output is the square wave signal and it works in astable mode, […]
3A PWM Power Generator Circuit with IC 555 and LM350
This circuit is for a high power pulse generator which uses 555 timer IC as a pulse oscillator and IC LM350 regulator which gives high current output; also IC 555 can handle high current up to 3A and gives small output current and IC LM350 provides output current upto 3A. Therefore, this 3A PWM Power […]
Touch ON OFF Switch Circuit using IC 555 Timer
Today, in advanced world, electronic touch switches are becoming very popular, they replace mechanical switches and therefore, there is no moving part, so its life is longer. This Touch ON OFF Switch Circuit using IC 555 Timer works as a bistable multivibrator and when we touch the touch point the output changes its state, that […]
6V to 12V Battery Monitor Circuit using CMOS IC 7555
Battery is very important in many electronic projects, but however battery voltage goes down slowly and so device may stop working properly. Therefore, we designed this simple 6V to 12V Battery Monitor Circuit using the CMOS 7555 IC to solve this problem. The circuit uses a 7555 timer IC and an LED to indicate the […]
Simple Drummer Sound Circuit using IC 555
Today electronic sound circuits are very popular among the young generation; hence, one such circuit which will benefit the beginners in electronic is a Simple Drummer Sound Circuit using IC 555. This circuit uses the IC 555 timer, which offers a low-cost, readily available solution for sound and timing projects, also its simple design makes […]