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DS DB SMT

taozhengbo·mmdvm_hs_duplex

DS DB SMT PCB layout, top view — open source STM32 board by taozhengbo
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About the DS DB SMT PCB

DS DB SMT is an open source STM32 PCB design by taozhengbo, published on GitHub. It is a 2-layer board measuring 66 × 58.4 mm, with 107 components from 42 distinct parts.

Its main chip is the STM32F103C8T6, from the STM32 family. Other key parts include the ADF7021. By type, the board carries 51 capacitors, 24 resistors, 12 inductors, 8 diodes, 5 connectors and 3 ICs.

From the project

duplex ver of mmdvm

This project provides a Raspberry Pi Hat for the MMDVM_HS Hotspot. It was designed for the Raspberry Pi any Version, but should work on any other Pi with the Hat interface.

First revisions of the board have been built successfully!

The PCB is designed in KiCad and the necessary libraries are included. The supplied Gerber files can be used to order PCBs, for example at Elecrow or DirtyPCBs.

Main components on the DS DB SMT

ADF7021STM32F103C8T6

DS DB SMT bill of materials (BOM)

107 components, 42 distinct parts.

QtyPartRefs
1
ADF7021
U1
1
STM32F103C8T6
U2
1
ADF7021
U3
1
TCXO
X1
1
8MHz
Y1
2
Conn_02x05_Top_Bottom
J1, J2
1
STLINK
P1
1
DISPLAY
P2
1
SMA
P3
1
Antenna_Shield
AE2
1
RPI-ZERO
PI2
3
red
D1, D4, D8
2
green
D2, D6
2
yellow
D3, D5
1
amber
D7
2
22n
L1, L7
2
20n
L2, L8
2
13n
L3, L9
2
27n
L4, L10
2
10u
L5, L6
Show 22 more
QtyPartRefs
2
18n
L11, L12
4
6p8
C1, C6, C35, C40
11
10n
C2, C7, C9, C17, C19, C22, C36, C41 +3
2
220p
C3, C37
2
10p
C4, C38
2
4p7
C5, C39
14
100n
C8, C10, C15, C16, C20, C24, C25, C26 +6
2
22n
C11, C45
2
470p
C12, C46
2
15n
C13, C47
2
1n
C14, C48
2
22p
C18, C33
2
20p
C21, C23
2
10u/10V
C28, C31
2
10u
C29, C32
2
10k
R1, R7
2
1k1
R2, R8
2
3k8
R3, R19
2
3r9
R4, R20
2
560
R5, R21
2
270
R6, R22
12
1k
R9, R10, R11, R12, R13, R14, R15, R16 +4

DS DB SMT design files

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

DS DB SMT: common questions

What microcontroller does the DS DB SMT use?

The DS DB SMT is built around the STM32F103C8T6, from the STM32 family.

How big is the DS DB SMT PCB?

The DS DB SMT measures 66 × 58.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the DS DB SMT?

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

Where can I download the DS DB SMT design files?

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

Can I use the DS DB SMT design in my own project?

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

Can I test firmware for the DS DB SMT 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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