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 few ...

This application note describes MLX90255 optical linear array, its features and properties. It briefly describes the use of photodiode arrays, as well as a circuit diagram consisting of a photodiode ...

Silicon circuits are great for switching lots of teeny tiny circuits at high speeds, and are also pretty good at making small LEDs, and their inverse, photodiodes. But if you want cheap, ...

A while back, [Chris Lu] was studying how analog circuits, specifically op-amps can be used to perform mathematical operations and wondered if they could be persuaded to solve differential equations, ...