4 layers70 × 80 mm
Easycomm
stamina/easyriderc
Motorcycle ECU STM32 ARM Cortex 4 source code and hardware PCB design
41 parts14GPL-3.0
4 layers70 × 80 mm
Easyrelay
stamina/easyriderc14Motorcycle ECU STM32 ARM Cortex 4 source code and hardware PCB design
- Size
- 70 × 80 mm
- Copper layers
- 4
- Thickness
- 1.58 mm
- Parts
- 78
- Nets
- 144
- Pads
- 429
- Tracks, vias
- 983, 108
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 18 Jan 2022
- Updated
- 10 Feb 2022
Overview
Easyrelay is an open-source printed circuit board by stamina, from the stamina/easyriderc repository on GitHub, published under the GPL-3.0 licence. It is a 4-layer board of 70 × 80 mm with 78 parts on 144 nets, routed with 983 tracks and 108 vias.
It is built around the TMCS1101A3UQDRQ1 and ULN2003LVD. Its parts include 19 capacitors, 13 switches, 9 ICs, 8 resistors and 6 connectors. It belongs with the STM32 boards of this library.
Main components
2
TMCS1101A3UQDRQ1
SOIC-8-2.25A~21.5A -40℃~+125℃ 1.8mΩ 200mV/A 3000Vrms 3V~5.5V 6.5us 80kHz Overcurrent Protection、Bidirectional detection Support SOIC-8 Current Sensors ROHSTexas InstrumentsCurrent Sensors
ULN2003LVD
SOIC-16-40℃~+85℃ 0.17uA 1.2V 12uA 140mA 15pF 170mV@50mA 250nA 5.5V BJT Seven channels SOIC-16 Darlington Transistor Arrays ROHSTexas InstrumentsDarlington Transistor Arrays
README
README.mdEasyRider
EasyRider REV C is a motorcycle telemetrics project, developed specifically for my Honda C90 classic bike.
The software is written in C using the libopencm3 library for the STM32 446RE Arm Cortex M4 microcontroller.
The PCB's were created with Kicad 6, you'll find all gerbers/schematics/datasheets in the /docs directory.
Functionality
EasyRider basically does the following things:
- Controls the lighting system: indicators, rear light, brake light, etc.
- Controls the claxon
- Contains an alarm system, based on an IMU
- Reads the motorcycle battery voltage and the power draw of the board
- Contains a buzzer for some startup/alarm sounds
- Reads the RPM of the motor via the CDI, through an opamp and optocoupled circuit
- Logs GPS coordinates and timestamps of events via the external RTC
- Sends all telemetry data over Bluetooth and writes it to onboard Flash.
Overall changes/benefits compared to Rev B
- Way more powerful -> Main board: STM32 Nucleo ARM Cortex 4 32bit mcu with Floating Point Unit
- Way easier debugging with SWD (Serial Wire Debug)
- Smaller form-factor size and more modular -> 2 detachable shields -> riser/daughter boards: 3x stack of 70mmx80mm boards, connected with double 2x19pin headers (76 pins total)
- EasyRelay board: PSU/Relay grid with connectors and 2x 16 port I/O expander IC's
- EasyComm boards: GPS/Bluetooth/IMU/Flash Storage/Sound(buzzer)
- Adafruit Ultimate GPS Breakout - 66 channel w/10 Hz updates - Version 3
- Adafruit LSM6DS33 + LIS3MDL - 9 DoF IMU with Accel / Gyro / Mag - STEMMA QT Qwiic
- Adafruit Bluefruit LE SPI Friend - Bluetooth Low Energy (BLE)
- 4-layer board instead of 2-layer -> less noise, crosstalk
- Lower power -> most IC's at 3.3V, relay coils at 5V
- Lower power -> switching 5V Voltage Regulator instead of Linear
- Radio connectivity: Bluetooth LE low power instead of power-hungry Wifi
- Fast storage for logging/settings/unique ID's/reboots etc. -> 256MBit WinBond SPI flash memory.
- New smaller molex connectors (Mini-Lock)
- More decoupling cap pads at longer traces
- Seperate 12V higher current wire for claxon relay
- Shift registers/IO expander IC before relays/darlington transitor arrays -> less pins needed on Cortex
- Shift registers/IO expander IC before input sense signals -> less pins needed on Cortex
Parts
78| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | 0.1uF | stamina_footprints:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C2, C3, C4, C6, C7, C8, C10, C12, C13, C16, C19 |
| 7 | 10uF | stamina_footprints:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C5, C9, C11, C14, C15, C17, C18 |
| 4 | MountingHole | stamina_footprints:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 3 | 10K | stamina_footprints:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3, R7, R8 |
| 3 | 18V Varistor | stamina_footprints:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | RV1, RV2, RV3 |
| 2 | 100K | stamina_footprints:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R4 |
| 2 | 1N4007 | stamina_footprints:D_DO-15_P12.70mm_Horizontal | D1, D2 |
| 2 | 20K | stamina_footprints:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R2, R6 |
| 2 | Fuse 6A 24V slow blow | stamina_footprints:Fuse_1206_3216Metric | F1, F3 |
| 2 | LOGO | stamina_footprints:EasyRider_logo1 | G***, G*** |
| 2 | ULN2003LV | stamina_footprints:TSSOP16_ULN2003LV | U2, U5 |
| 1 | 220 | stamina_footprints:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R5 |
| 1 | 330uF | stamina_footprints:CP_Radial_D10.0mm_P5.00mm | C1 |
| 1 | 3V3 | stamina_footprints:PinHeader_1x01_P2.54mm_Vertical | TP3V3 |
| 1 | 5V | stamina_footprints:PinHeader_1x01_P2.54mm_Vertical | TP5V |
| 1 | BRAKE_RELAY | stamina_footprints:MEDER RELAY_CRR05-1A | K3 |
| 1 | Battery | stamina_footprints:BatteryHolder_Renata SMTU1225-LF | BT1 |
| 1 | G5NB | stamina_footprints:Relay_SPST_Omron-G5NB-1A 5V coil, 12V switch 3Ampere | K13 |
| 1 | GND | stamina_footprints:PinHeader_1x01_P2.54mm_Vertical | TPGND |
| 1 | LD1117S33TR_SOT223 | stamina_footprints:SOT-223-3_TabPin2 | U3 |
| 1 | LEFT Morpho | stamina_footprints:PinHeader_2x19_P2.54mm_Vertical | J4 |
| 1 | LIB_RELAY | stamina_footprints:MEDER RELAY_CRR05-1A | K10 |
| 1 | LIF_RELAY | stamina_footprints:MEDER RELAY_CRR05-1A | K7 |
| 1 | LIGHT_RELAY | stamina_footprints:MEDER RELAY_CRR05-1A | K1 |
| 1 | LOGO | stamina_footprints:EasyRider_logo2 | G*** |
| 1 | MCP23S17 RELAYS | stamina_footprints:SSOP-28_5.3x10.2mm_P0.65mm | U9 |
| 1 | MCP23S17 SENSES | stamina_footprints:SSOP-28_5.3x10.2mm_P0.65mm | U4 |
| 1 | PILOT_RELAY | stamina_footprints:MEDER RELAY_CRR05-1A | K2 |
| 1 | PITIND_RELAY | stamina_footprints:MEDER RELAY_CRR05-1A | K6 |
| 1 | PITSTA_RELAY | stamina_footprints:MEDER RELAY_CRR05-1A | K9 |
| 1 | Polyfuse PPTC 1.1A 16V | stamina_footprints:Fuse_1206_3216Metric | F2 |
| 1 | Power and Relays 15pins | stamina_footprints:MolexMiniLock_1Ampere_1x15_P2.50mm | J2 |
| 1 | RIB_RELAY | stamina_footprints:MEDER RELAY_CRR05-1A | K4 |
| 1 | RIF_RELAY | stamina_footprints:MEDER RELAY_CRR05-1A | K11 |
| 1 | RIGHT Morpho | stamina_footprints:PinHeader_2x19_P2.54mm_Vertical | J6 |
| 1 | Screw_Terminal_01x03 | stamina_footprints:ScrewTerminalBlock_3_P5.08mm | J1 |
| 1 | Senses and switches | stamina_footprints:MolexMiniLock_1Ampere_1x15_P2.50mm | J5 |
| 1 | TLV2371IDBVR opamp | stamina_footprints:SOT-23-5_HandSoldering | U6 |
| 1 | TMCS1101A3UQDRQ1 | stamina_footprints:SOIC-8_3.9x4.9mm_P1.27mm | U8 |
| 1 | VACCU | stamina_footprints:PinHeader_1x01_P2.54mm_Vertical | TPACC |
| 1 | VBAT | stamina_footprints:PinHeader_1x01_P2.54mm_Vertical | TPBAT |
| 1 | VCURRENT | stamina_footprints:PinHeader_1x01_P2.54mm_Vertical | TPCUR |
| 1 | VO610A optocoupler | stamina_footprints:SMDIP-4_W9.53mm | U7 |
| 1 | VRPM | stamina_footprints:PinHeader_1x01_P2.54mm_Vertical | TPRPM |
| 1 | Wurth 5V SMPS package | stamina_footprints:WURTH-3PIN_FSDM_PACKAGE_TO-220-3_compatible | U1 |
| 1 | XTRA | stamina_footprints:PinHeader_1x01_P2.54mm_Vertical | J3 |
| 1 | XTRA1_RELAY | stamina_footprints:MEDER RELAY_CRR05-1A | K12 |
| 1 | XTRA2_RELAY | stamina_footprints:MEDER RELAY_CRR05-1A | K5 |
| 1 | XTRA3_RELAY | stamina_footprints:MEDER RELAY_CRR05-1A | K8 |
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Questions
How big is the Easyrelay PCB?
It measures 70 × 80 mm and has 4 copper layers, 1.58 mm thick.
What parts does the Easyrelay use?
78 parts, built around the TMCS1101A3UQDRQ1 and ULN2003LVD. 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 Easyrelay KiCad files?
From the stamina/easyriderc repository on GitHub, at the commit this page was made from: the board is kicad/easyrelay/easyrelay.kicad_pcb and its schematic kicad/easycomm/easycomm.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Easyrelay 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).