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M3radio

cuspaceflight·m3-avionics·m3radio/pcb_r2/m3radio.kicad_pcb

M3radio PCB layout, top view — open source STM32 board by cuspaceflight
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About the M3radio PCB

M3radio is an open source STM32 PCB design by cuspaceflight, published on GitHub. It is a 2-layer board measuring 39.5 × 39.5 mm, with 66 components from 42 distinct parts.

Its main chip is the STM32F405RxTx, from the STM32 family. Other key parts include the NCP380, NC7SZ04, CS2100-CP, SL18860DC and MAX_M8Q. By type, the board carries 30 capacitors, 10 ICs, 8 inductors, 7 resistors, 6 connectors and 4 diodes.

It belongs with the rf & radio designs in this gallery.

From the project

Martlet 3 Avionics

Datasheets: GPS ublox max-7q: https://www.u-blox.com/sites/default/files/products/documents/MAX7-NEO7HIM(UBX-13003704).pdf [Radio SI4460]: (https://www.silabs.com/Support%20Documents/TechnicalDocs/Si4464-63-61-60.pdf)

Main components on the M3radio

NCP380NC7SZ04CS2100-CPSL18860DCMAX_M8QSN74LVC1G0832STM32F405RxTxMCP2562Si4461NCP4620

M3radio bill of materials (BOM)

66 components, 42 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
NCP380
IC1
1
NC7SZ04
IC2
1
CS2100-CP
IC3
1
SL18860DC
IC4
1
MAX_M8Q
IC5
1
SN74LVC1G0832
IC6
1
STM32F405RxTx
IC101
1
MCP2562
IC102
1
Si4461
IC201
1
NCP4620
U1
1
TCXO
Y1
1
WEST TOP
J101
1
WEST BOT
J102
1
EAST TOP
J103
1
EAST BOT
J104
2
COAX
P101, P201
2
ESD_DIODE
D1, D2
1
RED
D101
1
GRN
D102
3
91nH
L1, L2, L3
Show 22 more
QtyPartRefs
1
120nH
L201
1
20nH
L202
1
24nH
L203
1
8.2nH
L204
1
6.8nH
L205
12
100n
C1, C4, C9, C10, C104, C105, C107, C108 +4
5
1u
C2, C3, C7, C8, C106
2
1n
C5, C11
1
220p
C12
1
2.2u
C13
1
4u7
C103
2
2u2
C110, C111
1
100p
C201
1
3p
C203
1
22p
C204
1
1p
C205
2
5.6p
C206, C207
1
10
R1
1
110k
R2
1
1M
R3
2
10k
R4, R5
2
100
R102, R103

M3radio design files

The KiCad project lives in the cuspaceflight/m3-avionics repository on GitHub; these links point at the commit this page was built from.

M3radio: common questions

What microcontroller does the M3radio use?

The M3radio is built around the STM32F405RxTx, from the STM32 family.

How big is the M3radio PCB?

The M3radio measures 39.5 × 39.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the M3radio?

66 components, from 42 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 M3radio design files?

From the cuspaceflight/m3-avionics repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the M3radio design in my own project?

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

Can I test firmware for the M3radio without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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