I’m starting a new robotics project that needs 7-8 channels
with extremely small & light servos. Initially I’ll control
the thing from a PC (serial or USB connection to controller),
then use a BeagleBone or something after the machine is debugged.
I was told these Spektrum servos have a non-standard interface?
Is it just normal PWM plus power?
Or a more raw interface requiring an H-bridge and AD for position sense?
Any source for the connectors?
I haven’t found any documentation yet…
Any recommendations for a servo controller for the above?
The connector itself is not standard R/C, and the servo’s voltage is between 3.2V and 4.2V (normal R/C servos operate at 4.8V to 6V).
It’s best to read through the guide to see if there are any other considerations (the pulse should also be at 5V, but there is a chance it’s at 3.3V - need to check).
We don’t have any boards which can connect to that servo without some sort of adapter or modification. We saw this servo before, but as you can see, there are some issues with it.
Can we know more about the application? Would a normal featherweight servo work? robotshop.com/en/hitec-hs-35 … motor.html robotshop.com/en/9g-micro-se … -4-8v.html
Thanks Coleman. What is the guide I should review?
No problem for me to provide a different servo supply
voltage, and/or clip the control signal iff required.
The tiny linear servos would be really great for
my application if possible…
Thanks again!
Best Regards, Dave
The website you indicated seems to have specs. The more information you can find the better. Have not played with it myself to give firsthand experience.
All I found on their website were basics like voltage, but not for example PWM timing specifications, max voltage for PWM input, max current draw, etc. Do you expect these would work with your ZX-servo16 RB-Inx-54 controller, or your Pololu Micro Serial 8 Servo Controller (given 4.2v servo power instead of 6v)?
Thanks!
Without the specs of the PWM signal, it’s hard to say.
The two servo controllers you mention are for standard R/C servos, so some adapting would be needed (at least for the connector).
