Trim for Shimano steps 6000

Other Hardware General Electronics
1

Hi.

I will trim my Shimano Steps and it works but.....

The sensor has 5v and goes from high to low when the magnet on the wheel passes. The interruption is about 1.5 ms.

The function in Arduino is to receive low from the sensor and send back the same low signal to the key ECU.

When the speed is over 20km / h, the transmission is halved to the Cycle ECU.

This works great when I power Arduino with external voltage (Available in bike)

Challenge. I do not want to power arduino via external voltage, I want to use the voltage that exists in cables that go between sensor and ecu.

Is there anyone who can suggest how I should do? sending the picure with my workin board.

works.png
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2

It's all up to you to measure the voltage on the cables and determine the current you can draw from those cables.

Paul

3

If you look at commercial versions of what you are trying to build like http://www.speedup.bike/en/prodotto/speedup-furious-for-shimano-steps-e6000-e6001-e6002-e6100-e7000-e8000-e8080/

I think that they power the controller of the lights power or there is enough power in the sensor connector to run a microcontroller.