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[on:]

I just bought two 6 pins differential encoders from US digital for my two motors robot. It is different with the usual encoder, since it has two additional A and B channels called A- and B- channel. I need help on how to attach those two additional channels in the arduino hardware interrupt. Thanks for the info

[Reply #1 on:]

the same as A and B, with a bit of wire

you might not even need them, none the less this is a software problem

[Reply #2 on:]

You need a differential reciever chip. It take the differential signal from the encoder and converts it to TTL for the Arduino.

It can also be done with an opamp, just requires more work.

Any particular reason why you got he differential output encoder instead of the TTL outputs?

You may be able use just the A & B signals, depends on what voltage levels they are for 1 and 0.

[Reply #3 on:]

I just bought two 6 pins differential encoders from US digital for my two motors robot. It is different with the usual encoder, since it has two additional A and B channels called A- and B- channel. I need help on how to attach those two additional channels in the arduino hardware interrupt. Thanks for the info

Assuming it's a 5 volt powered encoder you can just use the A+ and B+ signal wires (plus ground and power of course) just like a single ended TTL output encoder. If the encoder is of a higher voltage type then you will need voltage divider resistors to keep the high state at +5vdc.

Lefty