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10/30/2014 09:09 AM


Featured Circuit of the Week  
View: ALL Circuits of the Week

Modified Cheap Solar Path Light 

Modification of a typical solar path light with a standard 1000ma-hour NiMH AAA cell. I then replaced the small 4 cell solar panel with a larger 4 cell unit, which produced 150ma in the sun. Next, I simply changed the 470uH coil on the circuit board to a 22uH coil. The lower inductance increased the battery current to 40ma when the LED light was on, which translated to about 13ma LED current. The light was much brighter… [Circuit designed by David A. Johnson P.E., 05/4/2014]


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Faraday Switches are a tiny one inch cube electronic modules using a capacitance change technique.  They draw very low current and are ideal for battery powered applications. 
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Dave's Circuits collection of circuits designed by David A. Johnson, P.E.
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