Airlock bubble counter mount
thingiverse
This device will count bubbles during brewing. The bubble sensing is done by an IR photo sensor with a 10mm gap, that fits nicely around an airlock. The sensor includes an OPAMP and is mounted on a small board, and provides a strong signal easily readable with ESP32 digital input pin. The 3d print provides a slot for the board, and a ring for the airlock to mount the board, with the gap around the airlock tube. There is also a lid to keep liquids out, but not necessarily needed. Photo sensor board: https://www.amazon.com/dp/B01HXU1WME Airlock: https://www.amazon.com/dp/B008ACWSZU For more details on the connection of this device to ESP32 board and how I collect the data, please see https://github.com/cloudymike/fermctrl
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