It's fine. What I normally do is pull the control line down to ground and use the pins in push-pull (normal) mode. Your setup is useful if you want to operate in open drain mode to generate a 5V signal. In practice, I've never seen a servo that minds feeding off of a 3.3V control signal. Pulling the control line one way or another also serves the purpose of asserting a known state on the pin when the IOIO floats the pin, e.g. when your app is not running. Otherwise the servo may twitch. On Jun 21, 2015 12:11 PM, "Andrew Robinson" <[email protected]> wrote:
> Hi all > > Can anyone give this board design a quick once over to see if I have the > right idea on pull-up resistors. > > My 2 sided pcb board will sit above a Dagu 4 channel H-bridge motor > controller > <http://robosavvy.com/store/dagu-4-channel-dc-motor-controller-with-encoder-support.html>, > and the IOIO-OTG will then sit on top of that, using a sandwich of 0.1 > pitch female/male pins. > > Having read a blog about using servos with ioio > <http://mitchtech.net/android-ioio-servo-control/> I am concerned I have > understood Mitcech's diagram, and wired up the pull-up resistors correctly > (R2 and R3), I use pins 13 and 14 to drive PWM to the servo, and these pins > are also connected to +5v. > > Can anyone see any fault with what I have tried to do here, or is this ok? > (I have gray scaled other features of my board, to illustrate the parts of > the circuit Im discussing in this question, hope it helps explain) > > Thanks for any input. > > Andy > > > > > > > -- > 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/d/optout. > -- 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/d/optout.
