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Unread 27-02-2010, 23:46
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Quadrature Encoder Wiring to Digital Sidecar

I need help understanding the correct wiring scheme for the quadrature encoder from usdigital.

There are 4 leads:
1. +5
2. channel A
3. Gnd.
4. channel B

I have tried connecting +5 and ground to the spare +5 and ground connectors next to the digital inputs on the digital sidecar and each of the channels to the signal pin on a individual digital in port on the sidecar. I have tried connecting the ground pins on digital in ports to a common ground and leaving the ground on the digital in ports unconnected.

The results are fairly consistent: things will work for a few seconds then everything connected to the sidecar stops, the victors and jaguars LED starts to blink like the would if there was no PWM cable connected.

I haven't been able to find any documentation either on the FIRST site or on the usdigital site that specifically covers how to connect this encoder.

Ignorance is definitely not bliss today!

Any help would be greatly appreciated.
 


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