OnoESC Case Mock-up
I did a mock-up of a potential case design.
I also made some small changes to the design such as a cutout USB connector (for ruggedness and smaller vertical profile) and the addition of a NTC thermistor next to the FETs.
OnoESC Reflowed
Finally got my Digi-key order, populated and reflowed the board today. Now time for testing.
Interest in OnoESC
If you are interested in purchasing an OnoESC, kindly submit your email here so I can get an idea of how many I plan on making.
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Thanks!
The OnoESC
OnoESC : 32-bit 30A 3S Sensor-less Brush-less Motor Controller
The OnoESC is a 30A 3S sensor-less brush-less motor controller that is Arduino Zero compatible. I was searching for a low-cost opensource quad-copter-style ESC for a while and none turned up, so I decided this could be a good project to start.
I plan to make a 4-in-1 version in as well as a 4S version.
Current specs:
- Atmel ARM M0+ 48MHz microcontroller (ATSAMD21G18A-AU)
- 30 amps continous, >80 amps peak (TPN3R704PL,L1Q) (probably over-kill)
- Proper bridge drivers (LM5109BSD/NOPB) (may switch)
- 2 to 3S (6.6V to 12.6V)
- Current monitoring (with the ACS711KEXLT-31AB-T)
- Various control methods; PWM, I2C, Serial, USB, OneShot
- ~$10 BOM @1000
- 3.3V DC-DC converter
- 20mm x 43mm PCB
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- 30A Brushless ESC (4-layer)
