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 […]
DIY 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 […]
1.25V to 25V Adjustable Power Supply Circuit with IC LM350
LM350 is adjustable voltage regulator IC, which gives output from 1.25V to 25V and it can supply current up to 3A, because it can deliver more than 3A current, we must fix the LM350 on a big heat sink to remove heat properly. This 1.25V to 25V adjustable power supply circuit with the LM350 IC […]
1.2V to 30V 1A LM317 Adjustable Power Supply Circuit
Every circuit needs stable DC voltage, because power supply plays a very important role in electronics; however, AC voltage comes from main supply, so we need to convert AC to DC. Therefore, this circuit uses LM317 to make adjustable DC power supply and output voltage can change from 1.2V to 30V, with maximum output current […]
5V High Current Power Supply Circuit using IC 7805
The 7805 is a popular voltage regulator IC because it provides a fixed 5V output and offers easy operation; however, it can deliver only about 1A of output current, which limits its use in high current applications. Sometimes we need more current for our motors, relays or microcontroller project with many modules, so to solve […]