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.
- 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.
If you make one I would love to see it. Please post your pics as an issue or add them to this readme :)
