HardLabs

EngineManagement

ieb·EngineManagement·pcb/caninterfaceboard/EngineManagement.kicad_pcb

EngineManagement PCB layout, top view — open source AVR/Arduino board by ieb
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About the EngineManagement PCB

EngineManagement is an open source AVR/Arduino PCB design by ieb, published on GitHub. It is a 2-layer board measuring 97 × 56.1 mm, with 59 components from 30 distinct parts.

Its main chip is the ArdinoMinPro, from the AVR/Arduino family. Other key parts include the MCP2515, TJA1050, MCP2515Shield, LM7808CT and LM358. By type, the board carries 24 resistors, 17 capacitors, 6 ICs, 6 diodes, 4 relays and 1 crystal.

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 EngineManagement

MCP2515TJA1050MCP2515ShieldLM7808CTArdinoMinProLM358

EngineManagement bill of materials (BOM)

59 components, 30 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
MCP2515
U101
1
TJA1050
U102
1
MCP2515Shield
U201
1
LM7808CT
U202
1
ArdinoMinPro
U203
1
LM358
U204
1
8MHz
X101
1
CanBus
P101
1
Temps
K201
1
FuelCool
K202
1
FuelCoolAlt
K203
1
Supply
K204
3
SMBJ30CA-TR TSV
D101, D102, D203
2
1N5819
D201, D202
1
1N5819
D204
2
22pF
C101, C102
1
10uF
C103
2
100nF
C104, C105
2
1uF
C201, C202
3
1nF
C203, C204, C212
Show 10 more
QtyPartRefs
1
100uF
C205
6
10nF
C206, C207, C208, C209, C210, C211
1
10K
R101
3
22K
R201, R202, R220
3
1M
R203, R204, R219
3
470K
R205, R207, R218
3
1K
R206, R213, R214
7
100K
R208, R209, R210, R211, R212, R221, R222
3
4.7K
R215, R216, R217
1
500mA Thermistor
TH201

EngineManagement design files

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

EngineManagement: common questions

What microcontroller does the EngineManagement use?

The EngineManagement is built around the ArdinoMinPro, from the AVR/Arduino family.

How big is the EngineManagement PCB?

The EngineManagement measures 97 × 56.1 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the EngineManagement?

59 components, from 30 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 EngineManagement 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 EngineManagement 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 EngineManagement without the hardware?

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

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