AVR based automatic dog feeder
Tommi inspired by automatic cat feeder decided to make something similar for his dog. He came up with AVR microcontroller based cereal dispenser. Dispenser propeller is moved with help of DC motor. It is programmed to feed dog three times a day.
Instead of struggling he simply purchased wall mount dispenser which is usually used in candy shops and attached a DC motor to its propeller. Ne fixed dispenser to wooden box where bag of cereals are stored. Electronics side has some guts too. AVR microcontroller drives motor through L293D motor controller chip. Timekeeping is done by using DS1307 RTC chip. As for user interface there is a Nokia 3310 LCD used where various information is displayed.
Tommi seems to be excited about this project so he talks about future versions of it with more cool features.


