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: Wednesday, June 02, 2021 03:48 AM

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 Led CircuitsFlasher Circuits

Universal 3v LED Flasher #1

This hobby circuit below will flash any LED color with fixed current pulses powered by a 3v battery.  It uses a charge pump approach, which routes a constant current pulse through the LED, regardless of the LED voltage requirement. Using this approach, white and blue LEDs, which normally require about 3.6v can be flashed with a 3v battery.  With the component values selected, the LED is hit with 15ma current pulses lasting about 10ms every two seconds.  This keeps the average current draw from a 3v battery to about 200uA.

This hobby circuit relies on a cheap 74HC14 hex Schmitt trigger inverter IC.  One inverter forms a pulse generating oscillator.  Other inverters are ganged together to increase the drive current.  A two transistor circuit forms a constant sinking current controller. 


Click on Circuit Below to view PDF of Schematic


More  Led CircuitsFlasher 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.