HardLabs

LV Controller

MECSEM·electrical·LV-Misc/LV Controller/LV Controller.kicad_pcb

LV Controller PCB layout, top view — open source RP2040/RP2350 board by MECSEM

About the LV Controller PCB

LV Controller is an open source RP2040/RP2350 PCB design by MECSEM, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 100 × 100 mm, with 155 components from 50 distinct parts.

Its main chip is the RP2350B, from the RP2040/RP2350 family. Other key parts include the W25Q128JVS, OPA376xxDBV, ADS1115IDGS, SP3485EN and TPS5430DDA. By type, the board carries 57 capacitors, 50 resistors, 22 diodes, 13 transistors, 9 ICs and 2 switches.

It belongs with the power & battery designs in this gallery.

From the project

All the electrical designs for MECSEM.

KiCad sources for all the PCBs in the microscope.

This repository contains only the electrical design: schematics, PCB layouts, and KiCad symbol/footprint library.

A Linux Mint host PC inside the chassis (powered by the in-chassis PicoPSU) commands two central RP2350 controllers over USB:

HV Controller: the master optics-column controller. Drives source bias, lenses, deflectors, the scintillator detector, raster scan, and the PMT readout. Bridges the floating cathode side onto USB. LV Controller: the vacuum subsystem state machine: roughing pump, turbopump VFD (RS-485), isolation valve…

Main components on the LV Controller

RP2350BW25Q128JVSOPA376xxDBVADS1115IDGSSP3485ENTPS5430DDA

LV Controller bill of materials (BOM)

155 components, 50 distinct parts.

QtyPartRefs
1
RP2350B
U1
1
W25Q128JVS
U3
3
OPA376xxDBV
U4, U6, U11
1
ADS1115IDGS
U5
1
SP3485EN
MaxLinear
U8
2
TPS5430DDA
U9, U10
7
2N7002
Changjiang Electronics Tech (CJ)
Q1, Q2, Q3, Q5, Q6, Q8, Q10
6
HL2310A
hongjiacheng
Q4, Q9, Q12, Q13, Q14, Q15
1
ASE-12.000MHz
Y1
1
USB4085-GF-A
J2
1
DFU
SW1
1
RESTART
SW2
8
H3V3L10B
hongjiacheng
D1, D2, D3, D4, D16, D17, D20, D21
4
SMAJ26A
hongjiacheng
D5, D9, D12, D22
5
H5VS10BA
hongjiacheng
D6, D7, D13, D14, D15
1
PSM712-LF-T7
ProTek Devices
D8
2
SS54
D10, D11
1
Green
Hubei KENTO Elec
D18
1
Red
Foshan NationStar Optoelectronics
D19
19
100nF
Samsung Electro-Mechanics
C1, C2, C3, C4, C5, C6, C7, C8 +11
Show 30 more
QtyPartRefs
1
1uF
Samsung Electro-Mechanics
C14
2
10uF
Samsung Electro-Mechanics
C15, C17
1
2.2uF
Samsung Electro-Mechanics
C16
4
1uF
Samsung Electro-Mechanics
C19, C21, C52, C58
9
10uF
Samsung Electro-Mechanics
C20, C24, C25, C27, C29, C31, C48, C50 +1
4
330pF
Samsung Electro-Mechanics
C22, C23, C26, C28
6
10uF
C30, C33, C34, C35, C36, C44
2
10nF
C37, C38
2
22uF
C39, C40
5
2.2nF
Samsung Electro-Mechanics
C47, C51, C53, C57, C59
2
100nF
Samsung Electro-Mechanics
C49, C55
2
47Ω
UNI-ROYAL(Uniroyal Elec)
R1, R2
11
1kΩ
UNI-ROYAL(Uniroyal Elec)
R3, R4, R14, R15, R25, R38, R39, R40 +3
3
3.3kΩ
UNI-ROYAL(Uniroyal Elec)
R5, R6, R13
2
22Ω
UNI-ROYAL(Uniroyal Elec)
R7, R8
1
10Ω
UNI-ROYAL(Uniroyal Elec)
R9
1
120Ω
UNI-ROYAL(Uniroyal Elec)
R10
2
5.1kΩ
UNI-ROYAL(Uniroyal Elec)
R11, R12
2
100Ω
UNI-ROYAL(Uniroyal Elec)
R18, R19
13
10kΩ
UNI-ROYAL(Uniroyal Elec)
R20, R21, R23, R26, R27, R28, R29, R30 +5
1
1kΩ
UNI-ROYAL(Uniroyal Elec)
R22
2
6.8kΩ
UNI-ROYAL(Uniroyal Elec)
R31, R34
2
12kΩ
UNI-ROYAL(Uniroyal Elec)
R32, R35
2
220Ω
UNI-ROYAL(Uniroyal Elec)
R33, R36
1
47Ω
UNI-ROYAL(Uniroyal Elec)
R42
1
120Ω
UNI-ROYAL(Uniroyal Elec)
R43
1
6.8k
R44
1
2.2k
R45
1
5.1k
R46
1
3k
R47

LV Controller design files

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

LV Controller: common questions

What microcontroller does the LV Controller use?

The LV Controller is built around the RP2350B, from the RP2040/RP2350 family.

How big is the LV Controller PCB?

The LV Controller measures 100 × 100 mm, has 4 copper layers and is 1.6062 mm thick.

How many components are on the LV Controller?

155 components, from 50 distinct parts. The full bill of materials is listed on this page.

Where can I download the LV Controller design files?

From the MECSEM/electrical repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the LV Controller design in my own project?

Yes, under the terms of its GPL-3.0 license, which MECSEM chose for the repository.

Can I test firmware for the LV Controller 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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