In my previous article for Switch Selectable Four Frequency Pulse Generator Circuit frequency selection was done using manual switches. However, in this circuit the manual switching method is replaced with electronic switching using the CD4066B quad bilateral switch which is controlled by a 555 timer for automatic operation. CD4066 is a quad bilateral switch IC […]
Timer Circuits
Switch Selectable Four Frequency Pulse Generator Circuit
This Switch Selectable Four Frequency Pulse Generator Circuit is simple astable oscillator circuit and it uses the famous 555 timer IC in astable mode. Frequency can be changed in four steps, by just pressing switch and by selecting the capacitor. Here, output is the square wave signal and it works in astable mode, so it […]
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. 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 Generator […]
One Shot Timer Touch Switch Circuit
Today we designed a simple One Shot Timer Touch Switch Circuit. It works like one shot timer, when we touch the touch point the output becomes HIGH for few seconds and after that, it goes LOW automatically. This circuit uses IC 4011 and it is CMOS NAND gate IC which works on 9V battery. Circuit […]
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. When we touch the touch point the output changes its state, that means […]
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, to solve this problem we have built a simple 6V to 12V Battery Monitor Circuit using CMOS IC 7555. This circuit uses IC 7555 timer and it gives indication using an LED, […]