IOIO and servo motor

[Jean-Eric Cuendet]

Hi,

I'm new to servo motor programming and have a question.

If I understand right, the IOIO-OTG is not able to drive (provide enough current) to a standard RC servo motor, right?

So we need a kind of amplificator.

Is the ULN2003 that is seen on the majority of circuit with servo needed?

Thanks for your help

-jec

[Ytai Ben-Tsvi]

Wrong.

Hobby servo motors have built-in drivers in them, which require a power supply, typically 5V, which can be supplied from the IOIO-OTG 5V rail (up to 3A can be sourced) as well as a low current control line (typically the yellow / orange) line that needs to be connected to a PWM output on the IOIO. No external parts are needed. If you want to make sure the servo is not moving when your app is not running, you can connect a pull-down resistor between the control line and GND. Any value between 10k:100k is good.

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[Jean-Eric Cuendet]

Thanks à lot for the explaination, that s clear !

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