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 ...

How to use negative feedback to regulate output power from a laser diode using a simple, single op-amp based circuit ...

A G-M tube is not the only game in town though, and even the humble photodiode can be pressed ... so the whole circuit is contained in a diecast box with a foil window to allow radiation to ...

Using a bootstrapping scheme with a JFET can enhance a photodiode’s ac response, but adds unwanted dc voltage. Remedy that problem with a matched dual-JFET. 1. This circuit uses a JFET to ...