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.
On Fri, Jan 17, 2014 at 7:09 AM, Jean-Eric Cuendet <[email protected]>wrote: > 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 > > -- > You received this message because you are subscribed to the Google Groups > "ioio-users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/ioio-users. > For more options, visit https://groups.google.com/groups/opt_out. > -- You received this message because you are subscribed to the Google Groups "ioio-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/ioio-users. For more options, visit https://groups.google.com/groups/opt_out.
