2 layers65 × 40 mm
RS485 V4
jiazhengfu912-lang/STM32-Isolated-RS485-DevBoard
STM32F103C8T6 isolated RS485 development board: KiCad schematic, PCB, 3D previews and engineering validation
63 parts
2 layers57 × 41 mm
Cantoto
haroldm/cantotoHardware and firmware to convert infotaimment CAN messages.
- Size
- 57 × 41 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 56
- Nets
- 66
- Pads
- 206
- Tracks, vias
- 412, 62
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 26 Jun 2025
- Updated
- 28 Jun 2025
Overview
Cantoto is an open-source printed circuit board by haroldm, from the haroldm/cantoto repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 57 × 41 mm with 56 parts on 66 nets, routed with 412 tracks and 62 vias.
It is built around the STM32F103C8T6, AMS1117-3.3 and PHB2.0-02-16PWZ, with the AO3401A, MMBT3904 and TS-1088-AR02016 among its other parts. Its parts include 18 capacitors, 17 resistors, 6 ICs, 4 transistors and 2 switches. It belongs with the STM32 boards of this library.
Main components
6
STM32F103C8T6
LQFP-48(7x7)-40℃~+85℃ 12bit 20KB 2V~3.6V 32 Bit 37 64KB 72MHz ARM Cortex-M3 Built-in FLASH LQFP-48(7x7) Microcontrollers (MCU/MPU/SOC) ROHSSTMicroelectronicsMicrocontrollers (MCU/MPU/SOC)
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
PHB2.0-02-16PWZ
弯插,P=2mm-25℃~+85℃ 10.1mm 16P 18mm 2 250V 2mm 2mm 2x8P 3A 8 8mm Beige Copper alloy PA46 Right Angle Tin UL94V-0 弯插,P=2mm Wire To Board Connector ROHSXUNPUWire To Board Connector
AO3401A
SOT-231 P-Channel 14nC@10V 30V 47mΩ@10V、60mΩ@4.5V、85mΩ@2.5V 4A 55pF 645pF 80pF 900mV SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETsMMBT3904
SOT-23-55℃~+150℃ 1 NPN 100 100nA 200mA 200mW 300MHz 300mV 40V 6V NPN SOT-23 Bipolar (BJT) ROHSJiangsu Changjing Electronics Technology (CJ)Bipolar (BJT)
TS-1088-AR02016
SMD,4x3mm-30℃~+80℃ 1.6N 100,000 cycles 12V 2mm 3.9mm 3mm 50mA Black Round Button SMD(SMT) Tab SPST Surface Mount,Vertical Without Bracket SMD,4x3mm Tactile Switches ROHSXUNPUTactile Switches
README
README.mdcantoto
Hardware and firmware to convert infotaimment CAN messages.
This project is inspired from canbox and was originally a fork of it.
Messages converted:
- Illumination (autoradio dark or light mode) is converted to a 0V/12V binary signal
- Accessory power is converted to a 0V/12V binary signal
- Steering wheel media keys are converted to a voltage between 0 and 5v that will be sensed by the radio
Compatible vehicles: Audi A3 8P facelift (and probably other cars on the PQ35 platform). Compatible radios: ATOTO F7 (and probably most third-party radio)
Parts
56| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 10k | Resistor_SMD:R_0402_1005Metric | R1, R2, R3, R4, R7, R10, R12, R14 |
| 5 | 100n | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C4, C9 |
| 4 | 2.2k | Resistor_SMD:R_0402_1005Metric | R6, R8, R11, R13 |
| 4 | MountingHole | MountingHole:MountingHole_3mm | H1, H2, H3, H4 |
| 3 | 10u | Capacitor_SMD:C_1206_3216Metric | C16, C17, C18 |
| 3 | 4.7k | Resistor_SMD:R_0402_1005Metric | R5, R16, R17 |
| 2 | 100k | Resistor_SMD:R_0402_1005Metric | R9, R15 |
| 2 | 10p | Capacitor_SMD:C_0402_1005Metric | C10, C11 |
| 2 | 1u | Capacitor_SMD:C_0402_1005Metric | C7, C8 |
| 2 | 22u | Capacitor_SMD:C_0805_2012Metric | C12, C13 |
| 2 | AO3401A | Package_TO_SOT_SMD:SOT-23 | Q2, Q4 |
| 2 | MMBT3904 | Package_TO_SOT_SMD:SOT-23 | Q1, Q3 |
| 1 | 100n | Capacitor_SMD:C_0805_2012Metric | C15 |
| 1 | 10n | Capacitor_SMD:C_0402_1005Metric | C6 |
| 1 | 10u | Capacitor_SMD:C_0603_1608Metric | C5 |
| 1 | 120R | Inductor_SMD:L_0603_1608Metric | FB1 |
| 1 | 16MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | 330n | Capacitor_SMD:C_0805_2012Metric | C14 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U2 |
| 1 | Conn_ARM_JTAG_SWD_10 | Connector_PinHeader_1.27mm:PinHeader_2x05_P1.27mm_Vertical_SMD | J1 |
| 1 | LM78M05_TO252 | Package_TO_SOT_SMD:TO-252-2 | U4 |
| 1 | MCP4018 | Package_TO_SOT_SMD:SOT-363_SC-70-6 | U6 |
| 1 | PHB2.0-02-16PWZ | easyeda2kicad:CONN-TH_16P-P2.00_S16B-PADSS-1 | U5 |
| 1 | Polyfuse | Fuse:Fuse_1812_4532Metric | F1 |
| 1 | SMBJ15CA_C78809 | easyeda2kicad:SMB_L4.6-W3.6-LS5.3-BI | D1 |
| 1 | STM32F103C8T6 | Package_QFP:LQFP-48_7x7mm_P0.5mm | U1 |
| 1 | SW_SPDT | Button_Switch_SMD:SW_SPDT_PCM12 | SW1 |
| 1 | TJA1040T/CM,118 | easyeda2kicad:SOIC-8_L5.0-W4.0-P1.27-LS6.0-BL | U3 |
| 1 | TS-1088-AR02016 | easyeda2kicad:SW-SMD_L3.9-W3.0-P4.45 | SW2 |
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Questions
How big is the Cantoto PCB?
It measures 57 × 41 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Cantoto use?
56 parts, built around the STM32F103C8T6, AMS1117-3.3, PHB2.0-02-16PWZ and AO3401A. 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 Cantoto KiCad files?
From the haroldm/cantoto repository on GitHub, at the commit this page was made from: the board is hardware/cantoto.kicad_pcb and its schematic hardware/cantoto.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Cantoto design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).