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Mod1base

semianalog·mod1base

Mod1base PCB layout, top view — open source Microchip SAM board by semianalog

About the Mod1base PCB

Mod1base is an open source Microchip SAM PCB design by semianalog, published on GitHub under the CC0-1.0 license. It is a 2-layer board measuring 100 × 100 mm, with 110 components from 43 distinct parts.

Its main chip is the ATSAMD20G18A-AU, from the Microchip SAM family. Other key parts include the LM1117DT-3.3, 74HCT245PW, FT230XS and AP3211. By type, the board carries 40 resistors, 24 capacitors, 12 connectors, 10 switches, 5 ICs and 2 inductors.

From the project

Modular PSU base/motherboard

Base/motherboard for MOD1 series of modular power supplies.

Main components on the Mod1base

ATSAMD20G18A-AULM1117DT-3.374HCT245PWFT230XSAP3211

Mod1base bill of materials (BOM)

110 components, 43 distinct parts.

QtyPartRefs
1
ATSAMD20G18A-AU
U1
1
LM1117DT-3.3
U2
1
74HCT245PW
U3
1
FT230XS
U4
1
AP3211
U5
1
IRLML6402
Q1
2
COM
J1, J8
1
SWD
J2
1
OUT
J3
1
IN
J4
1
LCD
J5
2
5034801000
J6, J7
1
USB
J9
1
12V 500mA
J10
1
FAN
J11
1
PWRSENSE
J12
1
DRTR5V0U2SR
DZ1
1
1SMA5929BT3G
DZ2
11
SCREW
MP1, MP2, MP3, MP4, MP5, MP6, MP7, MP8 +3
1
750mA
RT1
Show 23 more
QtyPartRefs
1
SOFT1
SW1
1
PRESETS
SW2
2
SOFT2
SW3, SW4
1
SOFT3
SW5
1
ALL_LOAD
SW6
2
STORE
SW7, SW8
2
EVE-JBBF2020B
SW9, SW10
1
EXTRA
TP1
1
MBR0520
D1
2
6u8
L1, L2
8
100n
C1, C2, C3, C10, C12, C15, C16, C21
5
2u2
C4, C5, C11, C14, C19
2
10u/25
C6, C7
5
220p
C8, C9, C17, C18, C20
1
6u8/10
C13
2
22u
C22, C23
1
22u/25
C24
20
4k7
R1, R4, R5, R12, R13, R14, R15, R16 +12
12
100
R2, R3, R6, R7, R8, R9, R10, R11 +4
1
TBD
R17
3
27
R31, R32, R33
3
10k
R34, R36, R37
1
1k91
R38

Mod1base design files

The KiCad project lives in the semianalog/mod1base repository on GitHub; these links point at the commit this page was built from.

Mod1base: common questions

What microcontroller does the Mod1base use?

The Mod1base is built around the ATSAMD20G18A-AU, from the Microchip SAM family.

How big is the Mod1base PCB?

The Mod1base measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Mod1base?

110 components, from 43 distinct parts. The full bill of materials is listed on this page.

Where can I download the Mod1base design files?

From the semianalog/mod1base repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Mod1base design in my own project?

Yes, under the terms of its CC0-1.0 license, which semianalog chose for the repository.

Can I test firmware for the Mod1base without the hardware?

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

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