Kevlar earbud wire

Part 3 in the “How to Make an Ambient Light Monitor” series. The project continues by building an ambient light sensor circuit on a breadboard, digitizing the circuit’s output signals, and interpreting the digitized measurements.

How do you design a filter that (ideally) has the same gain for all frequencies? And, furthermore, why would you want to do this?

Scientists from the University of New South Wales have developed the world’s most efficient solar cell.