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EIT-Multiplexer

ErenErenel·EIT-Multiplexer-PCB·Hardware/EIT_Multiplexer.kicad_pcb

EIT-Multiplexer PCB layout, top view — open source RP2040/RP2350 board by ErenErenel
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About the EIT-Multiplexer PCB

EIT-Multiplexer is an open source RP2040/RP2350 PCB design by ErenErenel, published on GitHub under the CERN-OHL-S-2.0 license. It is a 2-layer board measuring 76.6 × 79.4 mm, with 49 components from 21 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the NCP1117ST33T3G, W25Q128JVS, LM27761DSGR and ADG1606BCPZ-REEL7. By type, the board carries 28 capacitors, 8 ICs, 6 resistors, 2 connectors, 2 switches and 1 crystal.

From the project

EE499 Capstone — Low-power 16-channel analog multiplexer PCB for Electrical Impedance Tomography (EIT). RP2040 + ADG1606, KiCad design files.

EE499 Capstone Project — Low-power analog multiplexer board for Electrical Impedance Tomography (EIT).

This board drives a 16-channel analog multiplexer (ADG1606) controlled by an RP2040 microcontroller. It is designed for EIT data acquisition, where the multiplexer selects electrode channels to inject current and measure voltage.

Key ICs: - Raspberry Pi RP2040 — microcontroller - ADG1606 — 16:1 analog multiplexer - AP2112K — 5V to 3.3V LDO regulator - LM27761 — negative voltage converter (for symmetric supply)

Main components on the EIT-Multiplexer

NCP1117ST33T3GW25Q128JVSRP2040LM27761DSGRADG1606BCPZ-REEL7

EIT-Multiplexer bill of materials (BOM)

49 components, 21 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
NCP1117ST33T3G
NCP1117-3.3_SOT223
ON Semiconductor
U1
1
W25Q128JVS
Winbond
U2
1
RP2040
Raspberry Pi
U3
1
LM27761DSGR
Texas Instruments
U4
4
ADG1606BCPZ-REEL7
Analog Devices
U5, U6, U7, U8
1
ABM8-272-T3
Abracon
Y1
1
10103594-0001LF
USB_B_Micro
Amphenol
J1
1
Conn_01x16_Pin
J2
2
R
R_INVERT1, R_INVERT2
2
SW_Push
SW1, SW2
2
GRM21BR61C106KE15K
10u
Murata
C1, C4
2
GCM1555C1H150JA16D
15p
Murata
C2, C3
10
GRM155R71E104KE14J
100n
Murata
C5, C6, C7, C9, C11, C12, C13, C14 +2
2
GRM155C81A105KA12D
1u
Murata
C8, C10
8
100NF
100n
C17, C22, C23, C24, C25, C26, C27, C28
2
4.7u
C18, C20
1
1u
C19
1
2.2u
C21
2
RC0402FR-071KP
1k
Yageo
R1, R5
2
RC0402FR-0710KP
10k
Yageo
R2, R6
Show 1 more
QtyPartRefs
2
RC0402FR-0727RL
27
Yageo
R3, R4

EIT-Multiplexer design files

The KiCad project lives in the ErenErenel/EIT-Multiplexer-PCB repository on GitHub; these links point at the commit this page was built from.

EIT-Multiplexer: common questions

What microcontroller does the EIT-Multiplexer use?

The EIT-Multiplexer is built around the RP2040, from the RP2040/RP2350 family.

How big is the EIT-Multiplexer PCB?

The EIT-Multiplexer measures 76.6 × 79.4 mm, has 2 copper layers and is 1 mm thick.

How many components are on the EIT-Multiplexer?

49 components, from 21 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 EIT-Multiplexer design files?

From the ErenErenel/EIT-Multiplexer-PCB 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 EIT-Multiplexer design in my own project?

Yes, under the terms of its CERN-OHL-S-2.0 license, which ErenErenel chose for the repository.

Can I test firmware for the EIT-Multiplexer 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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