4 layers41 × 41 mm
Flight Controller
benwys/SparrowHawk
Open source flight controller for FPV drones. Includes two complete hardware designs (kicad) with production files. Will include custom firmware (bare-metal cpp). In progress :-)
103 partsMIT
2 layers50.1 × 27.8 mm
Protocontroller
AxionQc/Protocontroller-Neo- Size
- 50.1 × 27.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 34
- Nets
- 66
- Pads
- 194
- Tracks, vias
- 705, 60
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 31 May 2025
- Updated
- 1 Oct 2025
Overview
Protocontroller is an open-source printed circuit board by AxionQc, from the AxionQc/Protocontroller-Neo repository on GitHub, published under the CERN-OHL-S-2.0 licence. It is a 2-layer board of 50.1 × 27.8 mm with 34 parts on 66 nets, routed with 705 tracks and 60 vias.
It is built around the SN74AHCT245PWRE4, 74AHCT374D and AP2112K-3.3TRG1, with the BM04B-SRSS-TB(LF)(SN), BM03B-SRSS-TB(LF)(SN) and XT30U-M.G.B among its other parts. Its parts include 7 resistors, 6 capacitors, 5 connectors, 4 ICs and 2 diodes.
Main components
6
SN74AHCT245PWRE4
TSSOP-20-40℃~+125℃ 1 11ns@5V,50pF 4.5V~5.5V 40uA 74AHCT 8 8mA 8mA Bidirectional Edge rate controllable、Output enable、Level shifting Tri-State TSSOP-20 Buffers, Drivers, Receivers, Transceivers ROHSTexas InstrumentsBuffers, Drivers, Receivers, Transceivers
74AHCT374D
SO-20-300mil-40℃~+125℃ 1 10.4ns@5V,50pF 140MHz 2.5ns 2.5ns 3pF 4.5V~5.5V 4uA 74AHCT Series 8 8mA 8mA D-Type Rising Edge Tri-State SO-20-300mil Flip Flops ROHSNexperiaFlip Flops
AP2112K-3.3TRG1
SOT-25-5-40℃~+85℃@(Ta) 1 250mV@(600mA) 3.3V 50uVrms 55uA 600mA 65dB@(1kHz) 6V Fixed Over Current Protection、Thermal Shutdown、Enable control Positive SOT-25-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSDiodes IncorporatedVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
BM04B-SRSS-TB(LF)(SN)
SMD,P=1mm-25℃~+85℃ 1 1A 1mm 1x4P 3.6mm 4 4.25mm 4P 50V 6mm Auxiliary Solder Pin Copper alloy PA SR Surface Mount,Vertical Tin UL94V-0 White SMD,P=1mm Wire To Board Connector ROHSJSTWire To Board Connector
BM03B-SRSS-TB(LF)(SN)
SMD,P=1mm-25℃~+85℃ 1 1A 1mm 1x3P 3 3.6mm 3P 4.25mm 50V 5mm Auxiliary Solder Pin Copper alloy PA SH Surface Mount,Vertical Tin UL94V-0 White SMD,P=1mm Wire To Board Connector ROHSJSTWire To Board Connector
XT30U-M.G.B
-- Power connector / plug connector ROHSChangzhou Amass ElecPlug
Parts
34| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 100nF_0402 | Capacitor_SMD:C_0402_1005Metric | C2, C4, C5 |
| 3 | BM04B-SRSS-TB(LF)(SN) | Connector_JST:JST_SH_BM04B-SRSS-TB_1x04-1MP_P1.00mm_Vertical | I2C-1, I2C-2, I2C-3 |
| 3 | LOGO | LOGO | AxionLogo, G***, Qr |
| 2 | 10K_0402 | Resistor_SMD:R_0402_1005Metric | R8, R11 |
| 2 | 10uF_0402 | Capacitor_SMD:C_0402_1005Metric | C3, C8 |
| 2 | 4.7K_0402 | Resistor_SMD:R_0402_1005Metric | R2, R3 |
| 2 | 5.1K_0402 | Resistor_SMD:R_0402_1005Metric | R1, R4 |
| 2 | Conn_01x14_Socket | Connector_PinSocket_2.54mm:PinSocket_1x14_P2.54mm_Vertical | J2, J3 |
| 2 | LED | LED_SMD:LED_0603_1608Metric | D1, D2 |
| 1 | 1uF_0402 | Capacitor_SMD:C_0402_1005Metric | C14 |
| 1 | 47K_0402 | Resistor_SMD:R_0402_1005Metric | R7 |
| 1 | 74AHCT374 | Protocontroller:SN74AHCT374PWR | U6 |
| 1 | AP2112K-3.3TRG1 | Package_TO_SOT_SMD:SOT-23-5 | U1 |
| 1 | BM03B-SRSS-TB(LF)(SN) | Connector_JST:JST_SH_BM03B-SRSS-TB_1x03-1MP_P1.00mm_Vertical | Mic1 |
| 1 | Conn_01x04 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | FanHeader1 |
| 1 | Conn_01x04 | Connector_Wire:JST_SM 1x04 Pad | J4 |
| 1 | Conn_02x08_Odd_Even | Connector_IDC:IDC-Header_2x08_P2.54mm_Horizontal | J7 |
| 1 | PINHD_2x5_Male | Protocontroller:HDR-TH_10P-P2.54-H-M-R2-C5-S2.54-N | IO1 |
| 1 | SN74AHCT08PWR | Protocontroller:TSSOP-14_L5.0-W4.4-P0.65-LS6.4-BL | U4 |
| 1 | SN74AHCT245PWR | Protocontroller:TSSOP-20_L6.5-W4.4-P0.65-LS6.4-BL | U5 |
| 1 | USB_C_Receptacle_USB2.0_16P | Protocontroller:USB-TH_TYPE-C-16PFS-LCH7.45-IPX8 | J1 |
| 1 | XT30U-M.G.B | Connector_AMASS:AMASS_XT30U-M_1x02_P5.0mm_Vertical | PanelPWR1 |
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Questions
How big is the Protocontroller PCB?
It measures 50.1 × 27.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Protocontroller use?
34 parts, built around the SN74AHCT245PWRE4, 74AHCT374D, AP2112K-3.3TRG1 and BM04B-SRSS-TB(LF)(SN). 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 Protocontroller KiCad files?
From the AxionQc/Protocontroller-Neo repository on GitHub, at the commit this page was made from: the board is Protocontroller.kicad_pcb and its schematic Protocontroller.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Protocontroller design in my own project?
Its repository publishes it under the CERN-OHL-S-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).