HardLabs

PiCanBoard

ieb·EngineManagement·pcb/picanboard/PiCanBoard.kicad_pcb

PiCanBoard PCB layout, top view — open source Raspberry Pi board by ieb

About the PiCanBoard PCB

PiCanBoard is an open source Raspberry Pi PCB design by ieb, published on GitHub. It is a 2-layer board measuring 106.7 × 61.6 mm, with 45 components from 32 distinct parts.

Its main chip is the RS485, from the Raspberry Pi family. Other key parts include the LM7808CT, BMP280, DS3231, MCP2515SHIELD and MCP2515. By type, the board carries 13 capacitors, 13 resistors, 7 ICs, 4 diodes, 3 connectors and 1 crystal.

It belongs with the sensors designs in this gallery.

From the project

Replacement engine electronics for a Volvo Penta D2-40 and other MDI based engines.

In July 2021 my boat was hit by lightning. The Volvo Penta D2-40 MDI unit that manages the Engine, a Volvo Penta D2-40F failed badly leaving the starter motor engaged and nearly causing an engine fire.

Update 20240417: In service, no issues after 3 years.

(see pcb/EngineManagementSimpleWithRelays.sch )

This project is based on the standard wiring for the core engine which is a Perkins 100. In that form the engine is controlled by switches, relays and a few flyback diodes. The only part of the original engine control that survived the strike was the Volvo Penta buttons, so those are used by…

Main components on the PiCanBoard

LM7808CTBMP280DS3231RS485MCP2515SHIELDMCP2515TJA1050

PiCanBoard bill of materials (BOM)

45 components, 32 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
LM7808CT
ADS1115
U1
1
BMP280
U2
1
DS3231
U3
1
RS485
RaspberryPi
U4
1
MCP2515SHIELD
DCDCConverter
U5
1
MCP2515
U101
1
TJA1050
U102
1
8MHz
X101
1
ADC
P1
1
CONN_1
Power
P2
1
CanBus
P101
1
2032 Battery
BT1
1
1Wire
K1
2
Thermistor
TH1, TH2
3
SMBJ30CA-TR TSV
D101, D102, D203
1
1N5819
D204
4
10NF
100nF
C1, C3, C4, C5
1
100UF
100nF
C2
1
1NF
100nF
C6
2
22pF
C101, C102
Show 12 more
QtyPartRefs
1
10uF
C103
2
100nF
C104, C105
1
100uF
C205
1
1uF
C206
1
2.2K
2K2
R1
3
10K
4K7
R2, R5, R11
2
47K
2K2
R3, R4
1
10K
2K2
R6
3
10K
1M
R7, R8, R10
1
10R
1M
R9
1
10K
R101
1
500mA Thermistor
TH201

PiCanBoard design files

The KiCad project lives in the ieb/EngineManagement repository on GitHub; these links point at the commit this page was built from.

PiCanBoard: common questions

What microcontroller does the PiCanBoard use?

The PiCanBoard is built around the RS485, from the Raspberry Pi family.

How big is the PiCanBoard PCB?

The PiCanBoard measures 106.7 × 61.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the PiCanBoard?

45 components, from 32 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the PiCanBoard design files?

From the ieb/EngineManagement repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the PiCanBoard design in my own project?

The repository has no license, so all rights stay with ieb. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the PiCanBoard without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug Raspberry Pi firmware against it before you order a PCB.

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