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Hobby Circuits designed by Dave Johnson

Last Updated on: Saturday, December 30, 2017 04:06 AM

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!


 
Circuits Designed by David Johnson, P.E. :

LED Flasher-Wig/Wag

LED Flasher-Wireless Circuit

LED_Light_8_Solar_Cell

LED_Light_for_Tool_Shed

Light_Pathway_1w_Solar_Cob_LED

Lighthouse_Solar_Powered

Line Powered High Intensity LED Flasher

Mason_Jar_Solar_Light

Night_Light_with_20_LED

One Nimh Cell powers White LED

One-Watt White LED Night Light

Solid State Relay that is Bidirectional

White LED Array that is Lined Powered

White LED Driver powered by a 3v Battery

White LED Night Light

White_LED_Lifetime_Tests

12v_To_24v_Solar_Battery_Charger

1-Nimh Cell powers White LED

1W White LED Night Light

24V DC Powered Beeper with 4 Separate Inputs

4_D-Cell_LED_Lantern_Modified

Colman_Lantern3_Modified

Control Variable LED Intensity

Fireflies_In_Jar_Solar_Light

LED Array powered by 24 VAC

LED Driver-Wireless


 

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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