Note: I made it because I want to learn how to make BLDC-ESCs, Designing my own FPV Stack, it WILL have errors, so do NOT use it in your Drone! The 4 in 1 ESC will be continued later, I don not have the experience to finish it yet.
- No Analog OSD, made for BetaFPV P1 or optionally Walksnail and DJI
- BEC: 5V 3A; 9V 3A
- IMU (Gyro): ICM-20602
- STM32F405
- Buzzer Pads
- 1 UART free to use e.g. for GPS
ESC and Flight Controller Connector Pinout:
| [1] | [2] | [3] | [4] | [5] | [6] | [7] | [8] |
|---|---|---|---|---|---|---|---|
| VBAT | GND | CUR | TEL | M1 | M2 | M3 | M4 |
VTX Connector Pinout:
| [1] | [2] | [3] | [4] | [5] | [6] |
|---|---|---|---|---|---|
| 5V | GND | U1_TX | U1_RX | GND | NC |
Based on EFM88B21, FD6288 and PSMN1R4-40YLDX.
- Bluejay (Layout A), BLHeli_S compatible
- Dshot bidirectional
10V Buck, 3,3V LDO and the ampmeter
[Will be finished, when I have more experience]: 4in1 ESC: Based on EFM8BB21, FD6288Q and 24 PSMN1R4-40YLDX. The PCB size is not final yet, it WILL change.
- Bluejay (Laout A), BLHeli_S compatible
- Dshot bidirectional compatible
- Current Sensor: INA168 with a 0.5mOhms shunt
- LMR14010 10V Buck to provide Gate voltage
- AP2204K LDO 10V -> 3.3V (You can see "pictures" when opening the PCB Files with KiCad)
The Flight Controller (FC) is the main control board and the "brain" of the FPV stack. It runs the flight-control firmware and uses its IMU to measure the drone's movement, which is required for stable flight.
The ESC Distribution Board distributes one battery connection to four individual ESCs. It also generates the 10 V gate-driver supply, and measures the total battery current.
Each Electronic Speed Controller (ESC) drives one three-phase brushless motor. Designing this small, high-current board was the most challenging part of the project.
PCBs:
Settings for FC:
Settings for ESC:
Settings for ESC-Distrib:
(You can change Surface Finish and Color if you want another Color or a higher quality finish)
Parts:
- Select the columns like this
- Click "Create BOM"
- Click on "Add to Cart"
| Part group | Qty used | Price (USD) |
|---|---|---|
| Resistors, including the current shunt | 68 | $3.09 |
| Capacitors | 85 | $9.99 |
| Inductors | 3 | $2.40 |
| Semiconductors and ICs | 57 | $73.05 |
| USB receptacle | 1 | $1.50 |
| Switches | 2 | $0.53 |
| Cables | 6 | $0.00 |
| PCBs | 6 | $103.30 |
| Shipping | 1-2 | ~$20-40 |
| Total | $195.79 |