4 layers42 × 44.4 mm
STM32 FlightController
JLjoestar23/STM32_FlightController
PCB, software, firmware, and other files related to a custom made STM32-based flight controller.
56 parts1
4 layers32.5 × 22 mm
Open PWM Gyro
jerinabr/Open-PWM-Gyro-Hardware1PWM gyro for fixed wing RC planes. Meant to be connected to an ELRS RX or other RX that outputs CRSF control data.
- Size
- 32.5 × 22 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 27
- Nets
- 39
- Pads
- 151
- Tracks, vias
- 308, 61
- Pours
- 11
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 24 May 2025
- Updated
- 6 Nov 2026
Overview
Open PWM Gyro is an open-source printed circuit board by jerinabr, from the jerinabr/Open-PWM-Gyro-Hardware repository on GitHub. It is a 4-layer board of 32.5 × 22 mm with 27 parts on 39 nets, routed with 308 tracks and 61 vias.
It is built around the ICM-42605 and PMEG2005CT,215-JSM. Its parts include 12 capacitors, 5 resistors, 2 ICs, 2 diodes and 2 connectors. It belongs with the STM32 boards of this library.
Main components
2
ICM-42605
LGA-14(2.5x3)-40℃~+85℃ 1.71V~3.6V 16bit 2KB 7.5uA IMU (accelerometer + gyroscope) Motion event detection SPI、I2C X,Y,Z X,Y,Z ±16g ±2000dps LGA-14(2.5x3) Accelerometers ROHSTDK InvenSenseAccelerometers
PMEG2005CT,215-JSM
SOT-231 Pair Common Cathode 200mA 240mV@100uA、320mV@1mA、400mV@10mA、500mV@30mA、800mV@100mA 2uA@25V 30V 600mA SOT-23 Schottky Diodes ROHSJSMSEMISchottky Diodes
README
README.mdDescription
6-channel PWM gyro for fixed wing RC planes. Meant to be connected to an ELRS RX or other RX that outputs CRSF serial data.
Layer Stackup
This is a 4-layer board with the following stackup:
- Signal + Power
- Ground
- Ground
- Signal + Power
Both ground layers are solid ground pours and aren't shown in the images section below
Features
- USB-C for device firmware upgrade and configuration
- SWD header for device programming and debugging
- 2-color status LED (red, blue) controlled by the MCU
- Boot switch to allow the device to enter the bootloader on power-up
- 6-axis IMU (3-axis accelerometer, 3-axis gyroscope)
- Pin header for servo/ESC connections with one 3-pin group for serial data input from the RX
Firmware
Firmware for this gyro can be found in this repo
BOM
| Reference | Qty | Value | Footprint | DigiKey Part # |
|---|---|---|---|---|
| C1,C5,C6,C7,C8,C9,C12 | 7 | 0.1u | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | 1276-6720-1-ND |
| C2,C4 | 2 | 1u | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | 1276-1445-1-ND |
| C3 | 1 | 22u | Capacitor_SMD:CP_Elec_4x5.4 | 732-8413-1-ND |
| C10,C11 | 2 | 10p | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | 311-1014-1-ND |
| D1 | 1 | PMEG2005CT,215 | Package_TO_SOT_SMD:SOT-23 | 1727-5188-2-ND |
| J1 | 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | 2073-USB4105-GF-ATR-ND |
| J2 | 1 | Conn_01x21 | Connector_PinHeader_2.54mm_Custom:PinHeader_3x07_P2.54mm_Vertical | TSW-107-26-F-T-ND |
| LED1 | 1 | LED_Dual_AKKA | LED_SMD_Custom:LED_APHBM2012QBDSURKC | 754-1506-1-ND |
| MT1 | 1 | ICM-42605 | Package_LGA_Custom:XDCR_ICM-42605 | 1428-1152-1-ND |
| R1,R2 | 2 | 5k1 | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | 13-RC0402FR-135K1LCT-ND |
| R3,R5 | 2 | 10k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | 311-10KJRCT-ND |
| R4 | 1 | 68 | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | 311-68.0LRCT-ND |
| SW1 | 1 | SW_SPST | Button_Switch_SMD_Custom:R-667995_MIT | 2508-R-667995TR-ND |
| SWD1 | 1 | Conn_02x05_Odd_Even | Connector_PinHeader_1.27mm:PinHeader_2x05_P1.27mm_Vertical | S9015E-05-ND |
| U1 | 1 | TCR2EF33_LMCT | Package_TO_SOT_SMD_Custom:SOT-25 SMV_TOS | TCR2EF33LM(CTTR-ND |
| U2 | 1 | STM32G431KBTx | Package_QFP:LQFP-32_7x7mm_P0.8mm | 497-19470-ND |
| Y1 | 1 | Crystal_GND24 | Crystal_Custom:Crystal_SMD_ECS_ECX_2236-4Pin_2.5x2.0mm | 50-ECS-160-10-36-CKM-TR3TR-ND |
[!NOTE] J2 is a 3x7 2.54mm pitch pin header. This part can be replaced with three 7-pin headers or seven 3-pin headers or some other combination to save cost
Images
Schematic
Page 1: Power + Connectors
Page 2: MCU + IMU
PCB
Top Layer
Bottom Layer
Top + Bottom Layer
3D View
Top
Bottom
Parts
27| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 0.1u | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C1, C5, C6, C7, C8, C9, C12 |
| 2 | 10k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R3, R5 |
| 2 | 10p | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C10, C11 |
| 2 | 1u | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C2, C4 |
| 2 | 5k1 | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R1, R2 |
| 1 | 22u | Capacitor_SMD:CP_Elec_4x5.4 | C3 |
| 1 | 68 | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R4 |
| 1 | Conn_01x21 | Connector_PinHeader_2.54mm_Custom:PinHeader_3x07_P2.54mm_Vertical | J2 |
| 1 | Conn_02x05_Odd_Even | Connector_PinHeader_1.27mm:PinHeader_2x05_P1.27mm_Vertical | SWD1 |
| 1 | Crystal_GND24 | Crystal_Custom:Crystal_SMD_ECS_ECX_2236-4Pin_2.5x2.0mm | Y1 |
| 1 | ICM-42605 | Package_LGA_Custom:XDCR_ICM-42605 | MT1 |
| 1 | LED_Dual_AKKA | LED_SMD_Custom:LED_APHBM2012QBDSURKC | LED1 |
| 1 | PMEG2005CT,215 | Package_TO_SOT_SMD:SOT-23 | D1 |
| 1 | STM32G431KBTx | Package_QFP:LQFP-32_7x7mm_P0.8mm | U2 |
| 1 | SW_SPST | Button_Switch_SMD_Custom:R-667995_MIT | SW1 |
| 1 | TCR2EF33_LMCT | Package_TO_SOT_SMD_Custom:SOT-25 SMV_TOS | U1 |
| 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J1 |
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Questions
How big is the Open PWM Gyro PCB?
It measures 32.5 × 22 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Open PWM Gyro use?
27 parts, built around the ICM-42605 and PMEG2005CT,215-JSM. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Open PWM Gyro KiCad files?
From the jerinabr/Open-PWM-Gyro-Hardware repository on GitHub, at the commit this page was made from: the board is Open_PWM_Gyro.kicad_pcb and its schematic MCU_And_IMU.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Open PWM Gyro design in my own project?
Its repository states no licence, so its author keeps all rights: ask jerinabr before reusing the design.