Lynxmotion Tech Support

Dear all,

I intend to drive 9-10 r/c servos (Hitec) using the control board (schematic) shown below:



At the present, there are already 5 sensors on-board: 2 PING sensors and 3 IR sensors occupying 5 I/Os of the control board. Now, in order to drive 10-11 r/c servos (possibly Hitec 645MG) using the same control board, what options do I currently have?

Is it possible to interface a SSC32 to this board? This way SSC32 may take control of all the servos. The control board is equipped with a propeller micro-controller. My plan is to do all the maths/calculations on a PC which may simply send PWM signals to SSC32 through the propeller. My interest lies in a solution which requires the least hardware modifications.

I am really novice in hardware modifications and hardware programming so any plug & play solution would definitely help me greatly. I therefore request forum members to guide me in this regard.

Appreciate your time and help.
Thanks

Didn't see any com ports!

Alan KM6VV

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The communication is through the usb port (next to the fan port as shown in the above figure).
Any suggestions please?

To use the USB port, you'd have to talk to it with a host (or OTG).

You could bit-bang a serial port from a digital I/O pin.

alan KM6VV

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Any plug & play solution to interface SSC32 with the above parallax control board? I see that there are some Digital I/O pins available. Can these be used to communicate with the SSC32. Any suggestions please.

Any microcontroller can talk to the SSC-32 using TTL serial communication. What is the concern with this board?.

_________________
Jim Frye, the Robot Guy
http://www.lynxmotion.com
I've always tried to do my best...

Thanks Jim for looking into this.

Yes, I looked at the "SSC32 interface with BotBoard2" in some tutorials but here I want to interface SSC32 with the board shown above using a propeller chip which operates at 0-3.3V. From the schematics of SSC32, I see that the Serial TTL communication port "Port 13" operates at 5V. One way could be to connect the RX pin on SSC32 to any one of the following GPI/O pins (using 4.7k resistors) on the control board as shown below:



I am not expert in interfacing hardware. Therefore, I request your kind assistance in this regard. My objective is to drive r/c servos through the propeller connected on this board. To achieve this, I need to interface SSC32 with the board so that it can receive data on its RX serial input pin from the propeller.

Please advise.
Thanks

My quick look through documentation is that the 12 io pins have 4.7k resisters inline to allow them to connect to 5 v devices, so output from ssc should not be issue. But output from board to ssc I am not sure if the voltage will be high enough for ssc32, sounds like other pins available with 0k ...

Urt