Today, I have failure to control feeder using GPIO again, I think that the GPIO cannot drive the motor. Please look at this forum:
The output current is about 20 mA, therefore, it is too small to drive the DC motor and it's enough to derive the LED light.
I need to buy a expansion board called GERTBOARD for Raspberry Pi, the picture of this board is shown as
Figure 1: GERTBOARD
So, I want to use it to drive the feeder, I hope it can bring luck to me.
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