HardLabs

LEC

MSTRocketDesignTeam·Liquid-Engine-Controller·oldRevisions/LECrevA/hardware/LEC/LEC.kicad_pcb

LEC PCB layout, top view — open source RP2040/RP2350 board by MSTRocketDesignTeam

About the LEC PCB

LEC is an open source RP2040/RP2350 PCB design by MSTRocketDesignTeam, published on GitHub under the AGPL-3.0 license. It is a 4-layer board measuring 152.9 × 77.2 mm, with 66 components from 15 distinct parts.

Its main chip is the Pico, from the RP2040/RP2350 family. Other key parts include the L7805, MC7809CTG, W25Q128JVSIQ, MAX31855KASA and L78L33ACZ. By type, the board carries 26 capacitors, 16 resistors, 14 connectors, 9 ICs and 1 diode.

From the project

Evolution of the RDT's Custom Liquid Engine Control Unit!

Main components on the LEC

PicoL7805MC7809CTGW25Q128JVSIQMAX31855KASAL78L33ACZMCP3564RT-E/ST

LEC bill of materials (BOM)

66 components, 15 distinct parts.

QtyPartRefs
1
Pico
U1
1
L7805
U2
1
MC7809CTG
U3
1
W25Q128JVSIQ
U4
2
MAX31855KASA
U5, U6
2
L78L33ACZ
U7, U8
1
MCP3564RT-E/ST
U15
12
54-00278
J1, J2, J3, J4, J5, J6, J7, J8 +4
2
Conn_01x02
J9, J10
1
1N5817
D1
11
100n
C1, C2, C4, C5, C6, C7, C8, C9 +3
3
100n
C3, C10, C11
10
10u
C12, C13, C14, C18, C19, C20, C21, C22 +2
2
10n
C23, C26
16
10K
R1, R2, R3, R4, R5, R6, R7, R8 +8

LEC design files

The KiCad project lives in the MSTRocketDesignTeam/Liquid-Engine-Controller repository on GitHub; these links point at the commit this page was built from.

LEC: common questions

What microcontroller does the LEC use?

The LEC is built around the Pico, from the RP2040/RP2350 family.

How big is the LEC PCB?

The LEC measures 152.9 × 77.2 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the LEC?

66 components, from 15 distinct parts. The full bill of materials is listed on this page.

Where can I download the LEC design files?

From the MSTRocketDesignTeam/Liquid-Engine-Controller repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the LEC design in my own project?

Yes, under the terms of its AGPL-3.0 license, which MSTRocketDesignTeam chose for the repository.

Can I test firmware for the LEC without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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