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Hobby Circuits designed by Dave Johnson

Last Updated on: Saturday, December 30, 2017 05:37 AM


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!

 
Active Filter Circuits
 
Circuits Designed by David Johnson, P.E. :
125Khz Ultra Pure Sine Wave Signal Source

3Khz Filter + Audio Amplifier

Active High Pass Filters

Collection Active High Pass Filters

Low Pass Filter, 3Khz, with an Audio Amp

 


 

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Dave's Circuits

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

 



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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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