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

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

HOME Schematics Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches
Welcome to DiscoverCircuits.com - online since 2002

See Media Kit for
Advertising Opportunities

Attention Designers:  Please alert us by eMail if we have linked to sites
where your original material has been copied without your permission.
We will change to the LINK to your site.  
Thank you.


Hobby Circuits designed by Dave Johnson

Last Updated on: Tuesday, October 24, 2017 03:04 PM

List of Dave's Circuit Designs

Text & Graphics Copyright David A. Johnson, PE  --  ALL Rights Reserved.
LINKING to Dave's circuits is permitted but DO NOT COPY CONTENT to your WEB SITE server!

Pulse Generator Circuits
Circuits Designed by David Johnson, P.E. :

Flashing LED Advertising Badge #1

Generate Short Delayed Pulse

Honeybee Counter

Indicates when it is Time to Dust

Indicates when it is Time to Dust

It's Time to Dust Indicator

LED Flashing Badge #1

LED Flashing Badge #2

Miniature Pushbutton On/Off Switch

On/Off Flip/Flop Circuit with Automatic Timeout

One Shot (D-Flip/Flop) Circuit

Oneshot & Latch Pushbutton

Pushbutton Oneshot & Latch

Slotted Opto-Sensor used in Honeybee Counter

Time to Dust

Timer for Darkroom Camera Shutter

Touch Activated Switch

Turn D-Flip/Flop into a One Shot Circuit

1 Second One Shot Circuit

12v Touch Switch Exciter Circuit

Accurate One Shot Pulse Generator

Advertising Badge #1 with Flashing LED

Advertising Badge #2 with Flashing LED

Automatic Timeout included with this On/Off Flip/flop Circuit

Battery-Powered LED Flashing Advertising #2

Delayed Pulse Generator

D-Flip/Flop One Shot Circuit

Fake TV Camera Flasher


Hobby Circuits by Category

  David A. Johnson, P.E. about these circuits



Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches

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

Discovercircuits.com endeavors to credit original designers.   Please alert us by eMail so we can
delete links to material that have been copied without your permission
.   Thank you.

Copyright of all original material on this website is the property
of David A. Johnson, P.E. (Dave Johnson & Associates ) unless otherwise noted.  

Linking is ALLOWED but COPYING any content or graphics to your web site is EXPRESSLY PROHIBITED.
All material is provided "as is" without guarantees or warranty of any kind, either expressed or implied.