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Hobby Circuits designed by Dave Johnson

Last Updated on: Friday, December 29, 2017 04:30 PM


Text & Graphics Copyright David A. Johnson, PE  --  ALL Rights Reserved.
LINKING to Dave's circuits is permitted but COPYING CONTENT to your WEB SITE server IS NOT!

Variable Gain Amplifier Circuits
Circuits Designed by David Johnson, P.E. :

0VAC to 280VAC Variable Isolated AC Voltage

12v-24v AC & DC Day/Night Switch

AC to DC (240v to 5v)Power Supply

Capacitance-Based Touch Switch

Circuit Eliminates 9v Battery

LM317 adjustable voltage regulator used in Battery Eliminator Circuit

Touch Switch 240VAC

Voltage Boost


 

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Dave's Circuits

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

 



HOME Schematics Index Hobby Corner Dave's Circuits Electronic Resources Contact Info
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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