arduino uno no detectado

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hola todos, comprado una placa arduino uno (sainsmart) y al conectar la placa mi pc e intentar cargar un sketch de ejemplo para ver si funciona me ha dado un error de esos de  "avrdude: stk500_getsync(): not in sync: resp=0x30 avrdude". estado mirando en el administrador de dispositivos y conectando y desconectando la placa y parece que no la detecta. desisntalado el ide y lo vuelto instalar y lo mismo.
alguien sabe que puede estar pasando??
el sistema operativo es windows vista sp1 y el ide es el 1.0.1.

gracias de antemano.

tienes que instalar el controlador para que aparesca en el ide, te recomiendo que te descargues el 1.0.5,
dentro de la carpeta de instalacion, hay una carpeta que dice driver, en el administrador de dispositivos de windows debe aparecer com6 o com8, o cualquier otro numero.

si al conectarlo no aparece ni siquiera dispositivo desconosido o si no hace ruido puede ser el cable o la placa.


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