Tag Archives: metrology

CuVoodoo #030 – audio is killing the music

building a sound level enforcer:
for a private club I built a sound level enforcer. if the DJ is playing music too loud, the device will shut off the audio output. for that I reversed a GM1351 sound level meter to extract the measurements from the LCD interface, send them over Bluetooth to the enforcer, which will cut the power to the main audio amplifier if a set threshold is exceeded for a couple a seconds.

source files source files watch on other devices (youtube)

Published: 2021-01-28 by King Kévin

CuVoodoo #028 – every electron counts

reversing USB meter protocols for long term low DC power logging:
To figure out the energy budget provided by a solar panel for a weather station, I needed a device capable of measuring low DC voltages and currents over a long period of time. For that I used the USB Power Meter (UPM) Web-U2, but I first had to reverse engineered the BLE and USB communication protocols it provided.

documentation source files watch on other devices (youtube)

Published: 2020-09-17 by King Kévin