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Last Updated on: Thursday, November 30, 2017 07:43 AM

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Solar Powered Wireless Sensor
Designed by Dave Johnson, December 20, 2009

A company in sunny Florida needed a DC power supply for a remote sensor. The sensor was connected to a low power microprocessor and a RF transmitter.  When switched on, it quickly transmitted collected data in a short burst.  The transmitter drew a peak current of 1 Amp for about 0.01 seconds from a 3v supply.  The transmitter was turned on only once every 10 seconds. 

The solutions was in incorporate some supercapacitors.  The  four capacitors, would be charged with the current from a solar panel.  The supercapacitors would be regulated with a voltage limiting circuit.

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DC Magazine, January 2010, Page 7:  Solar-Powered Wireless Sensor


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