After helping a fellow racer at the track diagnose an issue with his ESC and motor and having dealt with a similar issue with a damaged sensor cable, I decided to build a tool to help. I wanted something that could test each of the 3 hall effect sensors in the motor without having to take the motor out, just unplugging the sensor cable. I also wanted something that would test the sensor cable itself.

You plug the motor into the motor connector on the board and turn the rotor. The individual phases light up similar to the SkyRC motor tool.

You plug the sensor cable into both connectors on the board and if the cable is good, it lights up all 3 phases plus the Power/Ground LED. It doesn't test the temp pin, but I wasn't really concerned about that.

It will run off any power source between 6-30V. I originally was thinking of using a small 2s lipo, but that would require a BMS. So I just used a 9v battery.

Here's the schematic if you want to build your own. I have a couple of boards left over from building a couple of these for guys at the track. PM me if you're interested in buying one.

I did end up using a higher resistor for the power LED since that blue LED was blinding.

SensorMate schematic





Testing the cable

Testing the motor