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Automatic vs. manual
Funny that I never heard of the TranzX system before.
From what it looks like in the video it's (very) similar to what Shift4Me does, except that it uses a torque sensor.

First of all, concerning your question: a buzzer signal is highly recommended. It's needed to warn you when the shifting is being done, because you need to take the load off the chain for just a second. 

The 40€ type control unit looks neat. The plus/minus and A buttons will probably just short one of the colored wires. So that would be very easy to control the Arduino. The plus/minus code is already there, you'll just have to write a little extra code to control the auto/manual behaviour.
Maybe somebody here can help you on how the display is controlled...

Good luck and keep up posted on your build!

Messages In This Thread
Automatic vs. manual - by Fesh - 01-14-2021, 09:12 PM
RE: Automatic vs. manual - by Jan Oelbrandt - 01-15-2021, 08:45 AM
RE: Automatic vs. manual - by Ed_R - 01-17-2021, 08:09 PM
RE: Automatic vs. manual - by Fesh - 01-18-2021, 07:16 PM

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