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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

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

LM317 with Outboard Current Boost Circuit

The popular LM317 voltage regulator IC is designed to deliver not more than 1.5 amps, however by adding an outboard current boost transistor to the circuit it becomes possible to upgrade the regulator circuit to handle much higher currents, and upto any desired levels. You might have already come across the 78XX fixed voltage regulator … Read moreLM317 with Outboard Current Boost Circuit

Make this 3.3V, 5V, 9V SMPS Circuit

Here we learn about a simple switch mode power supply (SMPS) circuit which is capable of delivering 3.3V, 5V, 9V at around 800mA from a Mains input range of 100V to 285V, with a complete isolation. The functioning of the proposed 3.3V, 5V, 9V flyback SMPS Circuit may be understood by going through the following … Read moreMake this 3.3V, 5V, 9V SMPS Circuit

12V LED Backpack Power Supply Circuit

In this article we learn to make a simple 12v LED backpack power supply circuit for powering a 36watt LED lamp, which includes appropriately wired integrated sockets for enabling the attachment of external devices such as a regulated battery charger, ammeter, voltmeter etc. The idea was requested by Mr.  Kevin Bates Backpack LED Charger/Driver Firstly, … Read more12V LED Backpack Power Supply Circuit

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