Important: Calibrate buckets to 5 ml per pulse.
Example: Put 50 ml of water from a syringe into the funnel, tune the screws under the buckets until you get 10 pulses until the end of the syringe. Turning right increases the volume, turning left decreases it.
The author remixed this model.
Work in Progress
Refactoring the original to integrate a hall effect sensor (instead of the reed switch) and a Raspberry Pi Zero 2 W.