Arduino no funciona

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void pregunta() {
hola, tengo un problema , y es que cuando lo alimento por el usb no funciona y el chip dorado (el que hay al lado del usb)  se pone al rojo vivo. (llega los 60ºc)
--- actualizacion ---
fue por un pulsador que estaba conectado. ¿demasiada carga? ¿conexión incorrecta? en cualquier caso, mañana envío el esquema.

lo mas seguro es que fue una conexion incorrecta, ese "chip dorado" al lado del usb es un fusible reseteable el cual deberia de cortar la conexion entre el arduino y el usb al superar los 500mah de consumo.


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