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A doorbell for unwanted guests (aka Useless Machine) with PIC12F1840, a mechanical finger moved by a geared DC motor, a L293D driver, a limit switch and a speaker. Dear LMR, I am a 10-year-old girl and this is my first robot with MCU after I learnt basics of programming in C (I made a few simple 555-based robots before). It is also my first wooden box made myself so please kindly excuse how it looks J. The main parts MCU: PIC12F1840Inputs:o Activating switch: a wall-type ...
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