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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!

Audio Amplifier Circuits 
Amplifier -- Main Page          Math Functions -- Main Page
Circuits Designed by David Johnson, P.E. :
3Khz Filter + Audio Amplifier

3Khz Low Pass Filter Plus Audio Amp

Audio Amp + 3Khz Filter

Band Drummerís Microphone Switch

Boost Infrared TV/VCR Remote Signal

DVD Recorder + TV Camera Make Cheap Data Logger

Improve the quality of standard TV images

Infrared TV/VCR Remote Booster

Low Pass Filter, 3Khz, with an Audio Amp

Microphone On/Off Switch Circuit is Pop Free

IR TV/VCR Remote Booster

Pop Free Microphone On/Off Switch Circuit

Remote Range Extender TV/VCR

Remote TV Camera Power

TV /VCR Remote Range Extender Circuit

Video Signal Edge Enhancements

300v Peak to Peak Signal Generator



Hobby Circuits by Category

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




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

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