Meowton electronics
- Rapsberry PI: Version 2 or higher (Pi zero and rapsberry pi 1 are probably too slow)
- Servo motor, see Food dispenser
- Two HX711 converters:
An overview (click to zoom):
I recommend soldering everything, instead of using breadboards. (Those are less reliable)
Everything will be connected to the Raspberry PI (RPI). For reference heres the pinout:
I use a connector, but you can also solder directly to the RPI.
Connect the HX711 to the food loadcell:
- Red wire: E+
- Black wire: E-
- White wire: A-
- Green wire: A+
Connect the HX711 to the Raspberry:
- GND to GND
- VCC to 3v3
- DT to RPI GPIO 23
- SCK to RPI GPIO 24
The 4 loadcells are connected in bridge mode, to one HX711:
Connect the HX711 to the Raspberry:
- GND to GND
- VCC to 3v3
- DT to RPI GPIO 27
- SCK to RPI GPIO 17
The servo needs 5 volt and has one of the following pinouts:
- Connect the signal pin to RPI GPIO 18