![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg9xKQudwg-LZG2SIhNZGGBM-WLqJt3AkpLTob2SLkEf1AWx0S7zU-3N8oW95F_iURnik84TGYY7AcB6jQ62r4UyXZiw9H1YUFoBHx1kQoG677skf-0lFAO770bl8bvDgBij_S5KjzDXWSa/s320/plasticboxes.jpg)
Here's a pile of 2x2" plastic boxes 1/2" high that fit the BatMon boards quite well. If I cut off one side, I should have at least some protection from splash and other grit that enters the engine compartment.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgB8Nw0VCJXESX9QCVIMWh13DO5dpl-ifIiaus0_pam7Tk7MWmvObD618riyyH8vuuu8yCIzsruQrr2nD6_HAb0wSmPIAnG2Nnzav1dTAIS4Sfb7n-2O8i-3_Xtmg7Wwrf8Ih1PMCm271Un/s320/zolox_sensor.jpg)
Here's the Zolox speed sensor from EVSource. I don't know if it will work correctly with the SpeedHut tachometer that's coming, but I hope so. It took me awhile to figure out what the wires were. Red is +12V, Black is GND and Green is an active pulldown (Otmar uses a 2.6K pullup) every time a magnet (4 per revolution) in the small wheel passes the sensor.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiIrelejLa7TuPPFNewqlJbjM_Zay_6GGF0w5LjGPI2CFf19znWJlIkvqfC5wL0NN_3EF9EkV8KwAbi5z6aDDuzcXxQcz8kvmDn2yZPKEkeVrjM4ZFwVNI1VTOs6ktTIBf_54gWsAyfFBC0/s320/zolox_warp9_spacer.jpg)
Here's the spacer ring that allows easy connection of the Zolox sensor to the tailshaft of the Warp9 motor, also from EVSource. Since I cut my tailshaft off and there's very little clearance, I might not use this, or slice it thinner. With the cut tailshaft, I also lost the threaded hole in the middle of the shaft. I'm thinking about epoxying on the magnetic wheel instead.
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