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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!
 
Audio Amplifier Circuits 
Amplifier -- Main Page          Math Functions -- Main Page
Circuits designed by David Johnson, P.E. :

3Khz Filter + Audio Amplifier

Band Drummer’s Microphone Switch

Boost Infrared TV/VCR Remote Signal

DVD Recorder + TV Camera Make Cheap Data Logger

Improve the quality of standard TV images

IR TV/VCR Remote Booster

Low Pass Filter, 3Khz, with an Audio Amp

Microphone On/Off Switch Circuit is Pop Free

Remote Range Extender TV/VCR

Remote TV Camera Power

 

 

Hobby Circuits by Category

Dave's Circuits

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

 

 
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