![]() By other components I mean n-channel mosfet switches mainly. because I had to create pcb board for other components anyway so I included cpu there. It is used for setting time, alarms, etc. I have selected ATTiny841 because it had integrated hardware serial interface. Powered by a single 18650 Li-ion Rechargeable Battery. Operation is triggered by real-time clock module DS3231. The cpu is mostly in sleep mode, there is no display. ![]() Main goal was to keep power consumption low. After two months of operation it seems to be quite reliable.Įlectronics is based on ATTiny841 chip programmed in Arduino IDE. Therefore I have removed horizontal mixed and added much bigger vertical mixer powered by additional servo motor. However, flake food was jammed in hopper sometimes and mixer did not help to prevent such situations. Initially I used original design with mixer inside hopper powered by spur gear. I have slightly modified some parts, redesigned hopper, added base part and control box. This project is remix of “Automatic Fish Feeder with micro servo control V2” by Paulo Cunha.
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