Content for LM317

LM317

The LM317 is a popular adjustable positive linear voltage regulator. It was designed by Robert C Dobkin in 1976 while he worked at National Semiconductor.

Dual Output Adjustable Linear Power Supply +/-1.2V to +/-12V @ 250mA

“This project is a solution to power up most devices or projects requiring dual (+/-) adjustable power. The circuit consists of a stepdown transformer, bridge rectifier, DC filter capacitors, LM317 positive and LM337 negative adjustable voltage regulators, 2 x trimmer pot …

Low(est?) Cost Reproducible 3-axis CNC Mill

“As far as I know as of writing: this is the lowest cost 3-axis CNC mill you can build from available parts and repeatable instructions. It’s small and I hadn’t even thought of trying to cut steel before …

How to Make an Emergency Light

“Emergency lights are very useful gadgets and are quite popular, too. During the power failure, these portable lights are able to instantly illuminate through battery back up and never allow us to stumble in the darkness. Although you will find …

RC & Programmable Domino Laying Machine

“How to 3D print and assemble your very own programmable and remote controllable automatic domino laying machine. Who likes knocking down absurdly long runs of dominoes? I do. Who doesn’t like laying them all by hand. I don’t …

Brushed DC Motor Controller Using Infra-Red Remote

“This project enables the user to control a Brushed DC Motor using an Infra-Red Remote Control, thus controlling speed, direction, and also brake of DC Motor is possible. It’s an Arduino compatible open-source hardware that helps you develop many …

DIY Arduino Miliohmmeter for measure low value res

“Measuring low resistances with a standard multimeter is difficult and very inaccurate. This device solves this problem and serves for accurate measurement of small resistances in the range of 0.1 ohm up to 50 ohms. This device is very …

The Arduino CNC Drawing Machine

“Hi guys, so this instructable will help you out to make simple, less budget Arduino cnc plotter. In this project i had used some recycled parts like printer rail, smps box cd drive mechanism etc.. so the supplies that you …

4 Microphones Mixer Preamplifier

“Some time ago I was asked to solve the following problem: a small choir plays a number of four fixed microphones. The audio signals from these four microphones had to be amplified, mixed and the resulting signal had to be …

20A/40V Integrated Power Module for DC Brushless Motors (BLDC)

“This project is based on STK984-090A which is a fully-integrated inverter with current rating 20A and supply voltage 40V DC. It has been designed to drive the Brushless DC Motors (BLDC) and permanent magnet synchronous motors (PMSM), the module …

LM317 Current Boosting Secrets!

“LM317 Current Boosting Secrets! LM317 is one of the most popular adjustable regulator chips. The output voltage of the regulator can be adjusted from 1.25V to 35V. However, the chip can deliver currents up to 1.5A which is …