HardLabs

MmM

wyolum·mmM·kicad/mmM.kicad_pcb

MmM PCB layout, top view — open source AVR/Arduino board by wyolum
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About the MmM PCB

MmM is an open source AVR/Arduino PCB design by wyolum, published on GitHub. It is a 2-layer board measuring 99 × 80 mm, with 162 components from 55 distinct parts.

Its main chip is the ATMEGA328P-AU-ND, from the AVR/Arduino family. Other key parts include the TXB0104D, LM2675-5.0, LM2675-3.3 and DS3231N. By type, the board carries 24 capacitors, 18 resistors, 15 connectors, 10 diodes, 5 ICs and 4 transistors.

It belongs with the test & measurement designs in this gallery.

From the project

mmMercury is an Open Hardware, blood pressure measurement device (not FDA approved).

[CERN Open Hardware Licence v1.2 ]:http://www.ohwr.org/attachments/2388/cernohlv12.txt

Main components on the MmM

TXB0104DLM2675-5.0LM2675-3.3DS3231NATMEGA328P-AU-ND

MmM bill of materials (BOM)

162 components, 55 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
TXB0104D
U1
1
LM2675-5.0
U2
1
LM2675-3.3
U3
1
DS3231N
U5
1
ATMEGA328P-AU-ND
U7
4
BCP5416TA
Q1, Q2, Q3, Q4
1
16MHz
X1
1
5V_EXT
J1
1
3V3_EXT
J2
1
AREF
P1
1
ICSP
P4
1
FTDI
P5
1
GAGE_PR
P7
2
C3SB
P9, P10
1
VSel_Vlv
P11
1
PWR_IN
P13
1
X_VALVE
P14
1
PUMP
P17
1
PWR_IN
P24
1
VSel_Vlv2
P34
Show 35 more
QtyPartRefs
1
X_VALVE2
P38
3
I_O
B1, B2, B3
2
PB0
B4, B12
2
PC1
B7, B9
1
PC0
B8
1
PC6
B10
1
PC7
B11
1
BATT_HOLDER
BT1
34
via01
REF1, REF2, REF3, REF4, REF5, REF6, REF7, REF8 +26
28
via01
REF28, REF29, REF30, REF31, REF32, REF33, REF34, REF35 +20
4
SCREW
SC6, SC7, SC9, SC10
1
BUZZER
SP1
1
Reset
SW1
1
INT0
SW2
1
INT1
SW3
2
EN
W1, W2
4
ES1D-13-F
D1, D3, D4, D9
2
SS35
D2, D10
1
5V0
D5
1
3V3
D6
1
BLINK
D7
1
12V
D8
2
33uH
L1, L2
15
100nF
C1, C4, C7, C8, C9, C10, C11, C13 +7
2
22pF
C2, C3
2
330uF 25V
C5, C6
2
10nF
C12, C15
2
100uF 10V
C16, C18
1
100uF
C27
11
10k
R1, R2, R3, R4, R11, R12, R14, R15 +3
1
4k7
R5
3
1k
R6, R10, R13
1
Zero
R7
1
330E
R8
1
120E
R9

MmM design files

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

MmM: common questions

What microcontroller does the MmM use?

The MmM is built around the ATMEGA328P-AU-ND, from the AVR/Arduino family.

How big is the MmM PCB?

The MmM measures 99 × 80 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the MmM?

162 components, from 55 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 MmM design files?

From the wyolum/mmM 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 MmM design in my own project?

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

Can I test firmware for the MmM without the hardware?

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

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