Bacterial Growth Profile Monitor

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Developed for a student project, this meter has an LED and a linear light sensor to monitor the growth of bateria in an innoculated medium. An ESP32 relays the luminosity measurements to my server via MQTT

The designs were made in FreeCAD, and I used a Bambulabs P1S to print them. The dual design is to simultaneously monitor a control and an innoculated medium.

Results

growth of e-coli at 25C . all phases can be seen

Automatic cell plate reader

Repurposed a benchtop CNC as a cell plate reader using Python and GCode

For every elegant solution, there exists a trashy amateur solution 😌
CNC mill controlled via gcode to visit each cell and measure luminosity with a TSL2591. The mirror and LED is a bad hack till I get a backlight.
Placed in a black box while measuring over 2 days. https://t.co/VENd6xGLIa pic.twitter.com/2s2DrKR6vJ— Jithin B.P., Ph.D. (@jithinbp_) May 29, 2025