HardLabs

Mia

OpenKeyboards·Mia·PCB v1.1/mia.kicad_pcb

Mia PCB layout, top view — open source PIC board by OpenKeyboards

About the Mia PCB

Mia is an open source PIC PCB design by OpenKeyboards, published on GitHub. It is a 2-layer board measuring 376.2 × 171.5 mm, with 341 components from 42 distinct parts.

Its main chip is the PIC32MX470F512H, from the PIC family. Other key parts include the MCP1727, M24M02-DR, pcf2127t and INA219. By type, the board carries 122 diodes, 121 switches, 37 connectors, 25 resistors, 20 capacitors and 5 ICs.

It belongs with the keyboards designs in this gallery.

From the project

122 key keyboard PCB with usb spi uart i2c

Main components on the Mia

MCP1727PIC32MX470F512HM24M02-DRpcf2127tINA219

Mia bill of materials (BOM)

341 components, 42 distinct parts.

QtyPartRefs
1
MCP1727
U1
1
PIC32MX470F512H
U2
1
M24M02-DR
U3
1
pcf2127t
U4
1
INA219
U5
1
20Mhz
Y1
1
32.768Mhz
Y2
10
CONN_01X01
P1, P8, P9, P10, P11, P12, P13, P14 +2
1
ISCP HEADER
P2
1
CONN_01X06
P3
2
CONN_01X06
P4, P7
1
ViaPattern
P5
2
CONN_01X04
P6, P17
2
CONN_01X27
P18, P19
14
CONN_01X01
P20, P21, P22, P23, P24, P25, P26, P27 +6
4
CONN_01X01
P38, P39, P40, P41
1
Battery_Cell
BT1
1
EMI_Filter_LL
FL1
2
Jumper_NO_Small
JP1, JP3
121
SW
S1, S2, S3, S4, S5, S6, S7, S8 +113
Show 22 more
QtyPartRefs
1
PWR
PWR1
121
D
D1, D2, D3, D4, D5, D6, D7, D8 +113
1
TVSDiodeArray
D127
2
1.5A 600Ohms@100Mhz
L1, L2
1
PPS
L3
1
BL
L8
2
2.2uF
C1, C5
12
0.1uF
C2, C4, C6, C9, C10, C11, C12, C13 +4
1
630nF 16V
C3
2
18pF
C7, C8
1
10uF
C14
2
12.5pF
C19, C20
8
10k
R1, R11, R12, R14, R15, R17, R18, R20
1
1k
R2
1
200k
R3
1
R
R4
1
1M
R5
1
10R
R6
2
4.7k
R7, R8
2
100k
R9, R10
7
330R
R13, R19, R21, R22, R23, R24, R25
1
SENSE
R16

Mia design files

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

Mia: common questions

What microcontroller does the Mia use?

The Mia is built around the PIC32MX470F512H, from the PIC family.

How big is the Mia PCB?

The Mia measures 376.2 × 171.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Mia?

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

Where can I download the Mia design files?

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

Can I use the Mia design in my own project?

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

Can I test firmware for the Mia without the hardware?

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

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