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Connect PAS sensor to LSW1728-2-1E wired for torque

smitel

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Feb 25, 2021
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Is it possible to connect a PAS Sensor and possibly throttle to a LSW17288-2-1E that's wired for torque?

I was hoping to trace the wires to the PCB and potentially change some pin-assignment in GitHub - EBiCS/EBiCS_Firmware: Free FOC firmware for Lishui E-Bike-Controllers, but it's very potted inside.

Torque sensor measurements:
Red: ~14V
Green: 3.3V
Black: GND
Yellow: 3.3V
White: 0V

I just noticed the green pin for the torque is called "TA" which is the same as my original controller.
Should I just be able to find a 5V source for the PAS sensor and then wire the signal pin to the green pin of the torque connector?

Does anybody know what the ADI pin should mean?
How would I wire the throttle?

Controller pinout 1.jpg

Torque sensor wiring.png
 

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  • Controller pinout 1.jpg
    Controller pinout 1.jpg
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  • Torque sensor wiring.png
    Torque sensor wiring.png
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Is it possible to connect a PAS Sensor and possibly throttle to a LSW17288-2-1E that's wired for torque?
Is this great controller available again? From Phoebe Liu EV Parts it's not delivered to Europe sadly. :-(

This is a controller of the "new generation":
Pinout%20New%20Generation.PNG


The throttle has to be connected to the Pin "SP", you have to remove the potting to solder the wires in.
The PAS signal would have to be connected to TA1, it only works if the analogue signal for the torque is about 0.7V at switching on the bike and then has a higher value during rinding, just as it would be expected with the torquesensor installed.

There is a very long discussion about this special controller at the German Pedelecforum.
 
Last edited:
The throttle has to be connected to the Pin "SP", you have to remove the potting to solver the wires in.
The PAS signal would have to be connected to TA1, it only works if the analogue signal for the torque is about 0.7V at switching on the bike and then has a higher value during rinding, just as it would be expected with the torquesensor installed.

Ahh, the "ADI" from the photo corresponds with the "AD1" from your pinout. Thank you for the useful information!
 
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