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Automatic vs. manual
(01-17-2021, 08:09 PM)Ed_R Wrote: Good find Fesh, not an automatic system I knew of. According to the manual (link to pdf it uses a gradient sensor. Interesting way of doing it but wouldn't be my choice. Cadence sensor is best and add torque or power if you want to get fancy.

Since this is used for a pedelec, of course it has a cadence sensor, and some TranzX equipped bikes also have a torque sensor. The gradient is always "on top"...

Quote:The button unit does look ideal. However looking at the number of functions (3 buttons, 7 segment display and led) and only 8 wires I’m guessing it uses some kind of communication such as SPI. So the button unit would have its own microcontroller to decode the data and drive the outputs and send the button inputs back encoded as data.

Since the calibration of the gradient sensor is signaled in the 7-segment unit (and not in the main LCD unit), this means there are bike configurations without LCD, or at least possible. I don't know where the gradient sensor is located - in the button unit or in the controller, but we can be sure it's not in the LCD.

Quote:If it wasn’t so expensive it would be worth getting it to find out although I think it’s very unlikely the buttons are wired directly. Would be a fun project to reverse engineer and work out the communication protocol but maybe easier to build your own.

One can probably open and re-wire the button unit.
Sure it would be nice to have the current gear shown on the LCD, but the primary reason for me to use it would be the 3 buttons in a nice, watertight case.

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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