In order to help his friend prepare for a talk at DEFCON this weekend, [Craig] built an IR photodiode amplifier circuit. The circuit extended the detection range of the hack from a few inches to ...

A G-M tube is not the only game in town though, and even the humble photodiode can be pressed into service. [Robert] gives us a good example, with a self-contained radiation detector head that ...

Most infrared photodiodes are made of InGaAs, a material that is neither CMOS compatible nor good for the environment. Here’s an alternative.

Multiple photodiode detectors are used to track the transit of dye-labeled single lipids through an excitation spot at high resolution. One of the challenges of working at the cutting edge of ...