Over Current Cut-off Power Supply Using Arduino

In this post we are going to construct a battery eliminator / DC variable power supply which will automatically cut-off the supply, if the current flow through the load exceeds the preset threshold level. By Girish Radhakrishanan Main Technical Features The proposed over current cut-off power supply circuit using Arduino has 16 X 2 LCD display, … Read moreOver Current Cut-off Power Supply Using Arduino

0-40V Adjustable Power Supply Circuit – Construction Tutorial

This multipurpose general purpose supply generates as much as 2.5 amps from zero to 20 volts or up to 1.25 amps from 0-40 volts. Current limiting is variable within the entire range for either output options. By Trupti Patil Power Supply Main Specifications:   AN IDEAL POWER SUPPLY must provide a voltage that is variable … Read more0-40V Adjustable Power Supply Circuit – Construction Tutorial

2 Solid-State IC Based 220V Adjustable Power Supply Circuits

A couple of simple yet efficient 220V operated transformerless 50V adjustable solid-state power supply circuit using a single IC SR087 is discussed in the following article. The design does not depend on high value capacitors or inductors and yet is capable of delivering 100mA current to the attache load. Circuit#1: Main Features and Board Layout … Read more2 Solid-State IC Based 220V Adjustable Power Supply Circuits

1.5V Power Supply Circuit for Wall Clock

The post presents a simple transformerless 1.5V DC power supply circuit which can be used for powering wall clocks directly from mains, and also keep a stand by back-up cell fully charged for enabling an uninterrupted operation of the clock even during mains failures. The idea was requested by Cheekin Warning: This circuit is not … Read more1.5V Power Supply Circuit for Wall Clock

Transformerless 0-400V Power Supply Circuit

A cool 0-400V variable transformerless power supply circuit can be built using just a single chip LR8, and a few resistors. The IC features  a built in current control stage which makes the design extremely safe even for critical electronic circuits. How LR8 IC is Designed to Work The IC LR8 is quite similar to … Read moreTransformerless 0-400V Power Supply Circuit