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  Flashers and Blinkers  LED (Light Emitting Diodes) Circuits

Super Bright 3v Powered LED Flasher  (April 22, 2009) 

I have posted several kinds of LED flashers over the years.  This is yet one more flasher, designed to flash any high power LED of any color.  It hits the LED with a 25ms 250ma pulse once every 2 seconds.  This works out to an average current about 3ma.  It is powered by any 3v source.  I suggest two AA cells but a single 3v lithium coin type cell will also work.  With fresh AA cells, the light should flash for about two weeks.  The light flash is very intense and is perfect for any attention getting night time application.

The circuit uses a TLV3701, which is a nifty single low voltage, low current voltage comparator from Texas Instruments.  I configured the oscillator circuit to produce the needed pulse signal.  A charge pump circuit and an active current limiting circuit supplies the LED with the needed drive signal, whose voltage can exceed the 3v from the battery.  This method insures that the typical 3.6v required by most white LEDs can be produced.

Click on Circuit Below to view PDF of Schematic

circuitssuper Bright 3v Powered LED Flasher

More  Flashers and Blinkers 
LED (Light Emitting Diodes) Circuits

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.