When [b.kainka] set out to make the world’s simplest RF detector, he probably didn’t realize it would be as easy as it was. Consisting of only a handful of components and thirty eight lines of code, ...

LEDs are a wonderful technology. You put in a little bit of power, and you get out a wonderful amount of light. They’re efficient, cheap, and plentiful. We use them for so much! What you might not ...

While troubleshooting an optical positioning system, an engineer learns the importance of seeing. Several years ago I was doing the system and circuit design of agroupof R/W optical disk drives used ...

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Did you know that the LED can be used as a light detector? In fact green LEDs are the best for this, but all LEDs will detect light and produce a voltage equal to the characteristic voltage-drop. The ...

Each LED sensor exhibits different dynamic range, linearity, and sensitivity, which can be changed by altering the LED/detector angle. The sensors can readily measure dye concentrations several times ...