Hacked Gadgets Forum

January 11, 2008

Simple LED Color Sensor

at 10:56 am. Filed under DIY Hacks, Electronic Hacks

This is a pretty interesting walk though on how to process and read the microvoltage that an LED will put out when exposed to a light source . Who says you can’t teach an old component new tricks?

“Hook up a high-quality ultra-bright red LED by itself (no battery or other circuitry) to a multimeter in voltage measurement mode. Put the LED against a light source, such as a desk lamp. See the voltage? Now, hide the LED in a dark place. See a decrease in voltage?”

Via Make