HardLabs

Base18

M-o-a-T·moat-hardware·bms/base18/base18.kicad_pcb

Base18 PCB layout, top view — open source RP2040/RP2350 board by M-o-a-T

About the Base18 PCB

Base18 is an open source RP2040/RP2350 PCB design by M-o-a-T, published on GitHub. It is a 2-layer board measuring 140.4 × 84.9 mm, with 162 components from 42 distinct parts.

Its main chip is the Pico, from the RP2040/RP2350 family. Other key parts include the TSR_1-48120WI, ADBMS1818, AZ1117-5.0, MCP2562-E-SN and MCP2515-xSO. By type, the board carries 70 resistors, 43 capacitors, 21 transistors, 13 connectors, 11 ICs and 2 diodes.

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

From the project

Schematics and files for MoaT IoT things

This directory contains schematics etc. pertaining to our BMS.

Instead of isoSPI or similar schemes that require specialized ICs, we use remote-powered digital isolators. This allows us to combine controllers as required.

All modules are connected in a loop. Communication can run both ways. Thus a single interrupted connection or wire will not hurt.

We always connect an OUT plug to an IN plug. Damage will result when two OUT sockets get connected. The same happens with two IN sockets.

Main components on the Base18

TSR_1-48120WIADBMS1818PicoAZ1117-5.0MCP2562-E-SNMCP2515-xSO4051ESP32-WROOMLT1785xS8AZ1117-3.3

Base18 bill of materials (BOM)

162 components, 42 distinct parts.

QtyPartRefs
1
TSR_1-48120WI
U1
1
ADBMS1818
U3
1
Pico
U4
1
AZ1117-5.0
U5
1
MCP2562-E-SN
U6
1
MCP2515-xSO
U7
2
4051
U8, U9
1
ESP32-WROOM
U10
1
LT1785xS8
U11
1
AZ1117-3.3
U12
2
DMN2058U
Q1, Q2
19
DMP2035U
Q3, Q4, Q5, Q6, Q7, Q8, Q9, Q10 +11
1
Conn_LEM_3
J1
1
Conn_LEM_5
J2
1
Conn_01x02_Female
J3
3
Conn_01x04
J4, J5, J13
1
Conn_01x02_Female
J6
1
Conn_02x12_Odd_Even
J8
1
Conn_02x04_Odd_Even
J9
1
Conn_02x11_Odd_Even
J10
Show 22 more
QtyPartRefs
1
Conn_01x10
J11
1
Conn_01x09
J12
1
Conn_01x03_Socket
J14
1
FuseHolder
F1
1
Conn_01x02_Female
JCAN1
1
D_TVS_100V
D1
1
1N4448
D2
1
CP_10µ_100V_6m3
C1
1
CP_22m_16V
C2
31
CP_100n_50V_0603
C3, C4, C5, C6, C7, C8, C9, C10 +23
3
CP_1µ_10V_0603
C23, C24, C25
1
CP_1µ_100V_0805
C27
6
C_1µ_25V_0603
C34, C35, C36, C37, C38, C41
3
R_1M_0603
R1, R4, R62
2
R_5k1_0603
R2, R3
1
R_33_0603
R5
18
R_3k3_0603
R6, R11, R15, R18, R21, R24, R27, R30 +10
18
R_2.5_10W
R7, R9, R13, R16, R19, R22, R25, R28 +10
20
R_100_0603
R8, R10, R12, R14, R17, R20, R23, R26 +12
1
R_1k_0603
R61
1
R_22k_0603
R64
6
R_10k_0603
R68, R69, R70, R71, R72, R73

Base18 design files

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

Base18: common questions

What microcontroller does the Base18 use?

The Base18 is built around the Pico, from the RP2040/RP2350 family.

How big is the Base18 PCB?

The Base18 measures 140.4 × 84.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Base18?

162 components, from 42 distinct parts. The full bill of materials is listed on this page.

Where can I download the Base18 design files?

From the M-o-a-T/moat-hardware repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Base18 design in my own project?

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

Can I test firmware for the Base18 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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