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Hobby Circuits designed by Dave Johnson

Last Updated on: Tuesday, June 01, 2021 03:22 PM

Text & Graphics Copyright David A. Johnson, PE  --  ALL Rights Reserved.
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Bistable / Multivibrator Circuits
Circuits designed by David Johnson, P.E. :

Battery-Powered LED Flashing Advertising #2

Circuit Indicates Time to Dust

Flashing LED Advertising Badge #1

Generate Short Delayed Pulse

It's Time to Dust Indicator

Miniature Pushbutton On/Off Switch

Momentary Touch Activated Switch

Oneshot & Latch Pushbutton

Slotted Opto-Sensor used in Honeybee Counter

Timer for Darkroom Camera Shutter

Turn D-Flip/Flop into a One Shot Circuit

1 Second One Shot Circuit

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


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