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Hobby Circuits designed by Dave Johnson

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

List of Hobby 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!




Relay Circuits
 
Circuits Designed by David Johnson, P.E. :

Latching_Relay_Dusk_To_Dawn

Pushbutton Switch Through Glass

Relay Driver with Reduced Power

Solid State Relay that is Bidirectional

Solid State Touch Activated Switch

SSR Requires Ultra Low Control Current

Super Capacitor makes Low Voltage Latching Relay Driver

Switches AC or DC power using a Latching Relay

Tap Switch uses a Piezo Wafer

Touch_Activated_Battery_Powered_Latching_Relay

Ultra_Low_Control_Current_Isolated_Relay

Universal Flasher using a Latching Relay

Water Filling Station Controller

12v_To_24v_Solar_Battery_Charger

50ua Current Drives Solid State Relay Requires Only

Computer Controlled Power Relay

Finger Tap Piezo Relay

High Temperature Thermocouple activates Relay


 

Hobby Circuits by Category

Dave's Circuits

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

 


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


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