RC schematics

[ebarker]

Originally Posted by neoshaakti

oh, I was just curious to see how exactly the digital inputs are transfered to the radio which is controlled by the joysticks from the OI

hmm I guess I could open one up...but sadly we dont have any spares lying around...our only RC is on our robot

Forget the schematics !! All the heavy lifting is done in the processor.

a) Basically the digital pins go straight into the processor.

b) the software reads the pins and stuffs the values into a telemetry packet

c) the packet goes out the processor on a serial I/O uart which is connected to a RS485 driver which goes to the radio which goes to an antenna which goes to the 'ether' to the OI - > antenna - > radio -> serial I/O uart on the OI where the OI processor unpacks the telemetry packet and extracts out the field with the values and places it on a display or something at the rc.

d) the same process goes the reverse direction from the OI to the RC.

You just want really understand the micro architecture, from the Microchip data sheet, and the telemetry format, from the FRC code base.

The schematic is trivial, relatively speaking.