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120V

220V/120V LED String Light Circuit using a Single Capacitor

Last Updated on June 8, 2026 by Swagatam 67 Comments

ACledstring

In this post I have explained how to make a LED string light which can be operated from 220V mains through a single inexpensive PPC capacitor. The idea was requested by Mr. Basit Momin.WE STRICTLY CAUTION YOU THAT YOU BUILD THIS CIRCUIT ONLY IF YOU ARE AWARE OF THE DANGERS OF MAINS AC AND KNOW […]

Filed Under: Lamps and Lights Tagged With: 120V, 220V, LED, Light, Single, String

AC 220V/120V Mains Surge Protector Circuits

Last Updated on June 3, 2026 by Swagatam 177 Comments

Simple Mains AC Surge Protector Circuit Diagram2C Image

Voltage spikes  can sometimes be a big nuisance as far as the safety of the various electronic appliances are concerned. I have explained how to make a simple AC Mains surge protector circuits at home. What is a Surge Protector A surge protector is an electrical device which is designed to neutralize minor electrical spikes […]

Filed Under: Voltage Control and Protection Tagged With: 120V, 220V, AC, Mains, Protector, Surge

1.25V to 120V Mains Adjustable Voltage Regulator Circuit Diagram

Last Updated on January 17, 2025 by Swagatam 35 Comments

1.25Vto120Vadjustablevariablepowersupllycircuit

The TL783 is a variable three lead mains voltage regulator chip having an output range of 1.25 V to 125 V and a DMOS output transistor which is able to handle in excess of 700 mA current. High Voltage Specification It is specifically configured internally for working with high-voltage applications where ordinary bipolar voltage regulators […]

Filed Under: Power Supply Circuits Tagged With: 120V, 25V, Adjustable, Mains, Regulator, Voltage

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