This will also reduce the cost to reproduce the system: “[It’s] printed with PETG, the same thing used to make two-litre drink bottles, since it is food-safe; same as all the hoses and fittings. The water pump is actually a standard RV/caravan water pump.”
A Raspberry Pi 3 powers the system, with regular upgrades made to the Pi part of it. “I use the webiopi web interface program to provide the backbone for the system and the control software is written in Python,” reveals Chris. “I use the pigpio library for the I2C I/O and to control the waveform timing for a custom controller board that I designed to work with the Pi.”
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Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.