LM317 Archives – Circuits DIY

How to accurately measure low resistance with cheap Multimeter

We often need some low value resistors, less than 1 Ohm. Mostly as current sensing resistors in power electronics projects. You can't measure less then 1 Ohm with cheap multimeters.…

Arnab January 29, 2017

Basic Electronics

LM317 constant current source circuit design

A constant current source source can supply a fixed current to a load regardless of input voltage or load change. LM317 constant current source is one of the simplest design.…

Arnab January 26, 2017

DIY PCB Making

LM317 regulator board PCB making

LM317 is the most used and easily available adjustable voltage regulator. Here I've designed a simple PCB for the regulator with surrounding diodes, capacitors, resistors, etc. In this board, the…

Arup April 6, 2012

DIY LED Driver

DIY LED driver for 5Watt LEDs, 12V strips from 100-240 VAC

I got many requests to provide guide to build simple 230V to 1,3,5 Watt LED driver in response to my simple led driver diagram. So, below I'm writing an article…

Arup March 8, 2012