Stock, this radio module is just okay, but with a few modifications, it can be turned into a very good receiver with a spectrum analyzer and ... and by adding a simple Arduino, the complete ...

One of [Dooievriend]’s friends recently pressed him into service to write software for a 3d spectrum analyzer/VU that he made. The VU is a fairly complex build: it’s made up of 1280 LEDs in a ...

An Arduino Uno R3 has been used to monitor the ... Capacitors are first wired in parallel with flexible busbars inside of a 3d-printed housing. Busbars were custom made and are flexible 4AWG ...