JyeSmith/dshot-esc-tester: Thrust stand data logger utilising the dshot600 pr...

Uses the dshot600 protocol to communicate with the a blheli32 ESC and receive telemetry. Telemetry data is used to calculate KV and all info is displayed on the OLED.

Great for testing hand wound motors KV or new/troublesome motors.

Optional loadcell can be added to the pin header highlighted with the orange circle below. Data is printed via serial every 2-3ms.

20 second demo video https://www.youtube.com/watch?v=VLMNEdSz4wI

Schematics and PCB https://easyeda.com/jyesmith/kv-meter

Results form a rewound emax 2306 stator. Left is with 8 turns and the right images is with 9 turns.

WARNING - If #define MINIQUADTESTBENCH is uncommented the test sequence used by https://www.miniquadtestbench.com/ will automatically start!!! Below shows the results of testing an original EMAX RS2306 2400KV motor against the same motor wound with 0.5mm wire 8 & 9 turns per tooth.

6s data below also shows a comparison between single and multistrand windings.

BOM

Upload the gerber zip in the pcb folder to jlcpcb.com, select 1.6mm PCB thickness, and your favourite colour.
ESP32 development board. Get the same one as in the images above to be sure it mounts correctly. I removed the black plastic standoff on the pins so that it sits flat on the PCB and gives enough headroom for the upper PCB and regulator.
You favourite blheli32 esc. Make sure it has telemetry out and ideally a current sensor.
OLED 128*64. There are 2 common version but the Vcc and GND pins are swapped. This PCB has been designed to take both and you select which pin receives Vcc/GND by soldering the jumpers.
A 3V3 or 5V regulator. Either can be used and solder the jumper to which ever voltage you have used. This makes sure the ESP32 is powered correctly.
Optional loadcell for measuring thrust.