In this article I have explained 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 […]
Newly Updated Circuit Projects:
12 Amp Power Supply Circuit using Parallel LM317 ICs
This adjustable power supply is capable of delivering a maximum output of 12 A with an adjustable voltage from 4 V to 20 V through many LM317 ICs connected in parallel. It will allow testing of any device requiring a significant power supply, such as a direct current motor, a car amplifier, or even a […]
100V Regulated Power Supply Circuit Diagram with Over Current and Short Circuit Protection
A trustworthy and adaptable power source is essential in the world of electronic circuits. The design we present here not only offers a regulated output voltage range of 50V to 100V but also integrates safeguards to prevent potential mishaps. Let’s examine the specifics of this power supply circuit, discovering its special characteristics and how it […]
100 amp Variable Voltage Power Supply Circuit Diagram
The post describes a simple but extremely versatile 100 amp, variable voltage power supply circuit using just a few BJTs in parallel and in a common collector mode. The idea was requested by Mr. Andre. Technical Specifications Hello Swagatam, I was wondering if you could possibly assist me. on the blogs I have seen some […]
100 °C to 1000 °C Thermocouple Temperature Meter Circuit Diagram
In this post I have explained a simple op amp based thermocouple temperature meter circuit which can be used for measuring high temperatures in the range of 100 °C to 1000 °C, in heaters, furnaces, kilns tec. What is a Thermocouple A thermocouple is a simplest and the cheapest form of temperature sensor device, built […]
10 Simple Unijunction Transistor (UJT) Circuit Diagrams Explained
In the earlier post I have explained comprehensively about how a unijunction transistor works, in this post I will elucidate a few interesting application circuits using this amazing device called UJT. The example application circuits using UJT which are explained in the article are: 1) Square Wave Pulse Generator The first design below demonstrates a […]





