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Frontpanel

azonenberg·triggercrossbar·pcb/frontpanel/frontpanel.kicad_pcb

Frontpanel PCB layout, top view — open source STM32 board by azonenberg
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About the Frontpanel PCB

Frontpanel is an open source STM32 PCB design by azonenberg, published on GitHub under the BSD-3-Clause license. It is a 4-layer board measuring 220 × 29 mm, with 115 components from 27 distinct parts.

Its main chip is the STM32L431VxIx, from the STM32 family. Other key parts include the TCA6424A and AT30TS74_UDFN. By type, the board carries 38 resistors, 35 diodes, 26 capacitors, 4 connectors, 4 test points and 3 ICs.

From the project

Rack mountable crossbar matrix for T&M trigger in/out signals, allowing dynamic reconfiguration of an experiment without recabling

You probably don't want to build this as is, there's a couple of bugs. May or may not respin later on with fixes, for now I'm just bodging my prototype.

Bodge log at https://docs.google.com/document/d/14ighvhOLtBR-3ShkNhyRGlamA1f7WH5_sXfJCJYxb1o/edit

When finished, it will be a 1U rack-mountable appliance with a TBD number of BNC and/or SMA connectors on the back side for trigger inputs and outputs. Some will be input only, some output only, and some bidirectional. Exact mix is TBD.

Main components on the Frontpanel

STM32L431VxIxTCA6424AAT30TS74_UDFN

Frontpanel bill of materials (BOM)

115 components, 27 distinct parts.

QtyPartRefs
1
STM32L431VxIx
U1
1
TCA6424A
U2
1
AT30TS74_UDFN
U3
1
SSM6N58NU
Q1
1
PICOBLADE_10POS
J1
1
CONN_01X03
J2
1
XILINX_JTAG
J3
1
DISPLAY
J4
2
SWITCH
SW1, SW2
1
CONN_01X03
TP1
1
CONN_01X08
TP2
2
U.FL
TP4, TP5
32
GREEN
D1, D2, D3, D4, D5, D6, D7, D8 +24
3
CTS05S30,L3F
D33, D34, D35
1
MI0603J601R-10
FB1
1
TFM322512ALMA100MTAA
L1
14
0.47 uF
C1, C4, C5, C6, C7, C8, C9, C10 +6
3
4.7 uF
C2, C12, C15
1
0.1 uF
C3
1
4.7 uF 25V
C18
Show 7 more
QtyPartRefs
7
1 uF 25V
C19, C20, C21, C22, C23, C24, C25
1
10K
R1
1
DNP
R2
1
33
R3
2
4.7K
R4, R5
32
470
R6, R7, R8, R9, R10, R11, R12, R13 +24
1
0.47
R38

Frontpanel design files

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

Frontpanel: common questions

What microcontroller does the Frontpanel use?

The Frontpanel is built around the STM32L431VxIx, from the STM32 family.

How big is the Frontpanel PCB?

The Frontpanel measures 220 × 29 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Frontpanel?

115 components, from 27 distinct parts. The full bill of materials is listed on this page.

Where can I download the Frontpanel design files?

From the azonenberg/triggercrossbar repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Frontpanel design in my own project?

Yes, under the terms of its BSD-3-Clause license, which azonenberg chose for the repository.

Can I test firmware for the Frontpanel 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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