Finally had send this latest version for PCB fabrication. I had been busy recently but able to fork out some time to continue this hobby.This year new objective 2022 is to make this one work better than previous version. What I had done:
- I separated the ESC with Power Supply section to one board
- For the FC board, just plainly MCU, Gyro, Receiver.
- Now my custom receiver is upgraded to ESP12F. Sounds like expressLRS, but is not. It was my long time ago receiver until now. It was running on atmega328 but I had migrated to this ESP32 and now shrinking it. Also using E01-ML01 as the receiver (NRF24L01P compatible)
- I call it SimpleFC because I want it to be simple and clean. So, this round I had removed BARO and also using STM32F411CEU6 microcontroller. How I did that? I reverse engineered from the code. Based on the code, I mapped back the pins and build backs the schematic. Is a pretty fun process.
- Of course now is year 2022, we need USB C. I had found pin layouts from USB C pins and successfully linked it back to the board. No longer need to carry another USB cable for that. I know some are using WiFi cheap for flashing but I still prefer to have cables.
- Both the board sizes are: 37mm x 37mm with 1mm thickness and 4 layers.
Interested? Support me via -> https://www.buymeacoffee.com/bertfpv/schematic-for-simple-fc-simple-esc
You will be able to download the schematics.
Specifications:
FC:- USB-C port
- STM32F411CEU6 (FC MCU)
- MPU6000
- OSD
- ESP12F (Receiver MCU)
- 6 ESC outputs
- AUX1, AUX2 can be used for RSSI (Next version will link the RSSI)
- 2 hardware serial ports
- 1 I2C port
- Supports INAV or BETAFLIGHT
- 1 x CAM port with 5V power
- 1 x VTX port with 5V power
ESC:
- 4in1 ESC
- 18A each phase
- Including 3.3V and 2x 5V buck booster
- Voltage sensor
- Only support 1S (Supported voltage from 2.0v ~ 4.2v) Once the voltage hits 2.5v motor spins but not enough rpms to maintain. Only able to power up the electronics.
- Supports BlueJay and BLHeli_S firmware.
Top view - Flight Controller
Bottom view - Flight Controller
Top view - 4in1 ESC
Bottom view - 4in1 ESC
Layer view - ESC
Layer view - FC