Electronic Circuits and electronic circuits, electronic schematics plus an extensive resource for hobbyists, inventors and engineers

DiscoverCircuits.com, has 45,000+ electronic circuits, cross-referenced into 500+ categories.
We have searched the web to help you find quick solutions & design ideas.

Got Designs?
Please eMail
if you want me to link to and/or post your original design
NOTE:  We make every effort to link to original material posted by the designer. 
Please contact us if our link is not to your site!  Thanks.

DiscoverCircuits.com -- Hobby Corner
Last Updated on: Tuesday, June 01, 2021 03:06 PM

Hobby Circuits List

The contents & graphics of Discovercircuits.com are copyright protected.
LINK to Dave's circuit, but DO NOT COPY any files to your WEB SITE server

More  Line Power

Miniature 5v Line-Powered Isolated Supply   July 20, 2009

Often a circuit requires a 5v DC supply to power some logic circuits.  The conventional method is to use an AC wall adapter.  But, many systems, which bring AC power onto a circuit board, need a small AC to DC power supply right on the circuit board.  The circuit below provides such a supply.  It uses a classic series capacitor charge pump which acts as a current limiting device.  A full wave rectifier, a filter capacitor and a zener diode provide an off-the-shelf isolated DC to DC converter with a 24v DC input.  The miniature converter from CUI generates a regulated +5v output, rated at 100ma.  By doubling the size of the capacitor C1 the circuit can be pushed to produce 200ma of output current.  Also, the same front end circuit can be used with other CUI converters.  They sell 3.3v, 12v and 15v supplies as well as the 5v unit shown.

Click on Circuit Below to view PDF of Schematic

More  Line Power

Hobby Circuits List
eMail David A. Johnson, P.E. about this circuit

HOME Schematics Index Hobby Corner Dave's Circuits Contact Info
Imagineering Ezine Dave Johnson & Associates Faraday Touch Switches

 About Us   |  Advertise on DiscoverCircuits.com   |   Report Broken Links  |    Link to DiscoverCircuits.com  |    Privacy Policy

Copyright  January, 1998 - June, 2021     David A. Johnson  All Rights reserved. 
 Linking is ALLOWED but COPYING any content or graphics to your web site is EXPRESSLY PROHIBITED.