Follow the dog created by Jiali, but maybe the heavy burden of life makes it unable to lift its head, so this is a dog that sits and claps its hands and feet. It has modified the schematic PCB many times and exploded twice. voltage regulator, and also encountered the problem of programming timeout, which was solved one by one. Finally, a new board was used to specifically reduce the voltage of the battery, connected to the 5v and 3.3v inputs of the original board, and the original board was cut with a hand saw. Power input sawed off, grew rapidly, and gained a lot!
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