Variable Regulator | Electronic Project Circuits

Posts Tagged ‘Variable Regulator’

Bread Board Power Supply by LM317

uCHobbyâ€™s first electronics kit is a handy breadboard power supply. The power supply design is simple but just what I needed for my electronics projects. I have seen several similar power supply boards but none had all the features I wanted. This design was also a good first project to help me learn about Kicad.
Source:http://www.uchobby.com/index.php/2008/02/19/bread-board-power-supply/#more-104

Be the first to comment - What do you think? Posted by admin - March 4, 2008 at 10:11 am

Categories: Power supply, Variable Regulator Tags: dc voltage regulator, LM317, power supply, Variable Regulator

1.2 – 15V 3A adjustable regulated supply by LM1084

This kit provides a variable output power supply ranging from 1.2 to 15 V @ 3 A. It uses Low Dropout Positive Regulator LM1084 in TO220 package for delivering variable output voltage.

* Input – 18 VAC/DC
* Output – variable output from 1.2 ~ 15 V @ 3 A Regulated low ripple DC voltage
* Heatsink for regulator IC
* On board bridge rectifier to convert AC to DC
* LED indication at input of IC
* Zener trimmed band gap reference, current limiting and thermal shutdown (provided by IC feature)
* Power Battery Terminal (PBT) for easy input and output connection
* Onboard PCB mounted Potentiometer (POT) for varying the output voltage
* Filter capacitors for low ripple DC output

power supply +20V and -20V 5A by LM338

Here is Circuit power supply +20V and -20V 5A,Use IC LM338.
Nick initially adjusted the quiescent current to 3.5A but found after listening tests that increasing this to 4A gave a noticeable improvement. Even at an Iq of 4A the amps run cool due to the substantial heatsinking (0.5degC/W for each output device and each LM338K). Variations in quiescent current and dc offset with temperature are minimal, with an Iq of 3.8A and a dc offset of less than 35mV at switch-on.

Read More Source:http://www.tcaas.btinternet.co.uk/jlhesl.htm
Thank you.