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LEC Main Board

MSTRocketDesignTeam·Liquid-Engine-Controller·_archive/hardware-leviathan/LECV2.0_Main_Board/LECV2.0_Main_Board.kicad_pcb

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

About the LEC Main Board

LEC Main Board is an open source RP2040/RP2350 PCB design by MSTRocketDesignTeam, published on GitHub under the AGPL-3.0 license. It is a 2-layer board measuring 146.1 × 144.9 mm, with 51 components from 31 distinct parts.

Its main chip is the Pico, from the RP2040/RP2350 family. Other key parts include the INA_237, LMR33640ADDAR, W25Q128JVSIQ, Adafruit LSM6DSOX + LIS3MDL and XBee_HAT. By type, the board carries 19 capacitors, 13 resistors, 8 ICs, 5 connectors, 2 transistors and 1 fuse.

It belongs with the robotics & motion designs in this gallery.

From the project

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

Future developments may allow for preflight simulations (FEA / CFD of engine, estimated throttling curve, etc.).

LEC Main Board, from the project README
From the project README

Main components on the LEC Main Board

PicoINA_237LMR33640ADDARW25Q128JVSIQAdafruit LSM6DSOX + LIS3MDLXBee_HATBAV199_215

LEC Main Board bill of materials (BOM)

51 components, 31 distinct parts.

QtyPartRefs
1
Pico
U1
1
INA_237
U2
1
LMR33640ADDAR
U3
1
W25Q128JVSIQ
U4
1
Adafruit LSM6DSOX + LIS3MDL
U5
1
XBee_HAT
U6
2
BAV199_215
U7, U8
1
BUK6Y33-60PX
Q1
1
Q_NPN
Q3
1
LED Indicator Connector
J1
1
Ox Main
J2
1
Fuel Main
J3
1
Conn_02x07_Odd_Even
J4
1
Conn_01x02
J10
1
Fuse
F1
1
SSM3K2615R_LF
MOSFET1
1
D_Dual_Series_AKC_Parallel
D3
1
6.8 uH
L1
5
10u
C1, C16, C17, C18, C19
2
220n
C2, C9
Show 11 more
QtyPartRefs
2
100n
C3, C4
7
22 uF
C5, C6, C7, C8, C13, C14, C15
1
1u
C10
1
150u
C11
1
DNP
C12
6
10K
R1, R2, R3, R7, R9, R11
1
100
R4
3
1k
R5, R12, R13
1
100K
R6
1
24.9K
R8
1
2.49k
R10

LEC Main Board 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 Main Board: common questions

What microcontroller does the LEC Main Board use?

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

How big is the LEC Main Board?

The LEC Main Board measures 146.1 × 144.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the LEC Main Board?

51 components, from 31 distinct parts. The full bill of materials is listed on this page.

Where can I download the LEC Main Board 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 Main Board 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 Main Board 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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