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Circuits designed by David Johnson, P.E.
Last Updated on: Friday, December 29, 2017 02:53 AM

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!




Switch Circuits
 
Circuits Designed by Dave Johnson, P.E. :

Hidden Panic Switch

High Power Touch Switch Exciter Circuit

Infrared Reflected Light Switch

Infrared Safety Switch

Isolated Remote Switch Circuit

Light/Dark 12V Switch

Light/Dark Activated Motion Detector

Momentary Operation Touch Switch

Motion Alarm using piezo Device

On/Off Latch Circuit

On/off Pushbutton Switch with 30 Minute Timeout

On/Off Switch with Latching Relay

Piezoelectric Tap Switch

Piezoelectric Triggered Switch

Piezoelectric Vibration Sensor Activates Switch

Pop Free Microphone On/Off Switch Circuit

Pushbutton Activates Service Request Beeper

Pushbutton Oneshot & Latch

Pushbutton Switch works through Glass

Sink to Source Universal DC Converter

Small Pushbutton Controls 10 Amps AC

Switch Detects Audio Signal

Through Glass Push Button Switch

Touch Activated Battery Powered Latching Relay

Water Seepage Monitor

 

1.5V Touch Activated Switch 

120 VAC Touch Switch

12v Lamp Current Indicator

12v Light/Dark Lamp Switch

12v Touch Switch Exciter Circuit

12v Touch Switch Exciter Circuit

240VAC Touch Switch

3-Minute Closet Light #2

3-Minute Closet Light #2

3v Capacitance Proximity Switch

5 Volt Momentary Operation Touch Switch

5v Capacitance Touch Activated Momentary Switch

5w Fluorescent Lamp Intensity Modulator

6V to 24V DC Day/Night Switch

Circuit Protects from Battery Polarity Reversal

Closet Light with Automatic 3-Minute Timeout

Day/Night Switch-24vAC Powered

Detects Shadow Activated Motion

Finger Touch Activated Switch


 

Dave's Circuits

Hobby Circuits

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  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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