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Hobby Circuits designed by Dave Johnson

Last Updated on: Wednesday, June 02, 2021 04:39 AM

List of Hobby Circuit Designs

Text & Graphics Copyright © David A. Johnson, PE  --  ALL Rights Reserved.
LINK to Dave's circuit, but DO NOT COPY CONTENT to your WEB SITE server!
Automotive Related Circuits
 
 
Circuits designed by David Johnson, P.E. :

12v DC Motor with Logic Controlled Automatic Brake

Auxiliary 12v Automotive Style LED Light Makes Table Lamp

Beeper indicates Check Engine

Car Ignition 12v Switch

Check Engine Beeper

Flashing Light to simulate Car Alarm

Indicates Automotive Electrical Voltage

Wireless RFID Smart Key Detector

 

 

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Dave's Circuits

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

 
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