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Circuits designed by David Johnson, P.E.
Last Updated on: Friday, December 29, 2017 02:53 AM


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Clock Circuits

 
Circuits Designed by Dave Johnson, P.E. :

Chicken Coop Door Opener with Timer

Closet Light with Automatic 3-Minute Timeout

Darkroom Camera Shutter Timer

Divide By 1.5 Counter

Garage Door Closer

Laser Used as Vehicular Traffic Counter

Line Powered 60hz Clock Generator

On/Off Flip/Flop Circuit with Automatic Timeout

On/off Pushbutton Switch with 30 Minute Timeout

Pushbutton Activates Service Request Beeper

Time Garage Door to Close

36-Hour Watchdog Timer

3-Minute Closet Light #2

555 Timer Forms Simple PWM Motor Controller

 

Dave's Circuits

Hobby Circuits

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

 

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

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Copyright  January, 1998 - December, 2017     David A. Johnson & Associates.  All Rights reserved. 

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