Everything for Electronics
Nuts & Volts Magazine (November 2007)

LED Based Photometer

By L. Paul Verhage    View In Digital Edition  

There’s a new sensor that I’d like to share with you this month that only requires a few LEDs and a resistor. Therefore, you probably already have everything in your junk box needed to build it...


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LED Photometer DESQview file and the bottom copper layout image