HardLabs

Lambda x2

rusefi·rusefi-hardware·lambda-x2/lambda-x2.kicad_pcb

Lambda x2 PCB layout, top view — open source STM32 board by rusefi

About the Lambda x2 PCB

Lambda x2 is an open source STM32 PCB design by rusefi, published on GitHub. It is a 4-layer board measuring 81.9 × 95 mm, with 230 components from 53 distinct parts.

Its main chip is the STM32F103RCTx, from the STM32 family. Other key parts include the MAX31855KASA, MCP6002T-I/SN, LM78M05_TO252, XC6206P332MR and REF3033. By type, the board carries 106 resistors, 68 capacitors, 30 diodes, 15 ICs, 4 transistors and 4 inductors.

It belongs with the usb & debug tools and sensors designs in this gallery.

From the project

pinout source https://github.com/rusefi/rusefi/tree/master/firmware/config/boards/lambda-x2

pinout source https://github.com/rusefi/rusefi/tree/master/firmware/config/boards/lambda-x2

https://www.shop.rusefi.com/shop/p/dual-channel-wbo

Features: STM32F103 dual channel wideband AFR controller supporting Bosch LSU4.9 and LSU4.2 (LSUADV work in progress) CAN and analog output Bluetooth or USRT TunerStudio connectivity

Options (not icluded in default BOM) x2 EGT input using MAX31855KASA or MAX31856 x2 auxilary analog input: 0..5V with pull-up or pull-down (configurable by soldering resistor). One can be used to source 5V to external sensor. x2 2 auxilary output 0..5V. Also can be…

Lambda x2, from the project README
From the project README

Main components on the Lambda x2

MAX31855KASASTM32F103RCTxMCP6002T-I/SNLM78M05_TO252XC6206P332MRREF3033TJA1051T-3GS8332-SR

Lambda x2 bill of materials (BOM)

230 components, 53 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
MAX31855KASA
U1, U14
1
STM32F103RCTx
U2
6
MCP6002T-I/SN
U3, U7, U10, U12, U13, U17
1
LM78M05_TO252
U4
1
XC6206P332MR
U5
1
REF3033
U6
1
TJA1051T-3
U8
2
GS8332-SR
U9, U11
4
BTS3028
Q1, Q2, Q3, Q4
1
XXDCELNANF-8MHZ
Y1
1
33311-24AW-2
P1
1
BSMD1206-025-33V
F1
1
A4988
BLUE
D1
4
GREEN
D2, D5, D29, D30
4
RED
D3, D8, D10, D11
1
SMCJ22CA
D4
1
1N4148W
D6
3
NUP2105L
D7, D9, D12
16
ESD5V0D9B
D13, D14, D15, D16, D17, D18, D19, D20 +8
4
470R@100MHz
L1, L2, L3, L4
Show 33 more
QtyPartRefs
12
1u
C1, C6, C7, C8, C12, C16, C25, C28 +4
40
100n
C2, C3, C5, C11, C13, C14, C15, C18 +32
1
4.7u
C4
9
1n
C10, C35, C72, C75, C76, C77, C78, C79 +1
1
1u 25V
C21
1
100n 25V
C22
2
47p
C44, C45
2
20pF 50V
C70, C71
1
10K
10k
R1
8
10k 0.1%
R2, R7, R9, R11, R57, R58, R59, R60
1
20K
61.9R 1%
R3
2
10R
R4, R56
2
100K
10k 0.1%
R5, R6
15
1k
R8, R10, R23, R26, R29, R79, R83, R86 +7
2
47R
R12, R61
7
10k 1%
R13, R36, R53, R62, R82, R105, R106
18
10k
R14, R16, R18, R21, R30, R49, R54, R63 +10
2
2.7k 0.1%
R15, R64
2
30k 1%
R17, R65
4
100k 0.1%
R19, R20, R67, R68
2
62k 1%
R22, R70
2
22k 0.1%
R24, R71
2
47k 1%
R25, R72
5
100k 1%
R27, R52, R81, R102, R103
8
3.3k
R28, R34, R43, R44, R47, R76, R77, R78
2
330R
R31, R35
4
82k
R32, R37, R98, R99
4
160k
R33, R38, R100, R101
2
6.8k 0.1%
R41, R73
4
68k
R42, R45, R74, R75
2
1K
R50, R51
1
61.9R 1%
R55
4
100R
R92, R93, R94, R95

Lambda x2 design files

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

Lambda x2: common questions

What microcontroller does the Lambda x2 use?

The Lambda x2 is built around the STM32F103RCTx, from the STM32 family.

How big is the Lambda x2 PCB?

The Lambda x2 measures 81.9 × 95 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Lambda x2?

230 components, from 53 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 Lambda x2 design files?

From the rusefi/rusefi-hardware repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Lambda x2 design in my own project?

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

Can I test firmware for the Lambda x2 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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