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Last Updated on: Saturday, December 30, 2017 04:34 AM


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Data Logging / Acquisition Circuits

 
Circuits Designed by David Johnson, P.E. :

120 VAC / 240 VAC Indicator

Characteristics of CMOS Logic Inverter Amplifiers

Digital noise generator

Divide a TTL Clock Signal by 1.5

DVD Recorder + TV Camera Make Cheap Data Logger

Indicates 120 VAC or 240 VAC

Slotted Opto-Sensor used in Honeybee Counter


 

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Dave's Circuits

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Copyright  January, 1998 - December, 2017     David A. Johnson & Associates.  All Rights reserved. 


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