HardLabs

Comms

cuspaceflight·hybrid-ignition·pcb/comms/comms.kicad_pcb

Comms PCB layout, top view — open source STM32 board by cuspaceflight

About the Comms PCB

Comms is an open source STM32 PCB design by cuspaceflight, published on GitHub. It is a 4-layer board measuring 80 × 50 mm, with 50 components from 25 distinct parts.

Its main chip is the STM32F437VIT6, from the STM32 family. Other key parts include the ADP3335, MAX14787E and RJHSE-538x. By type, the board carries 19 capacitors, 9 diodes, 7 resistors, 5 crystals, 5 connectors and 4 ICs.

From the project

Hybrid Rocket Engine Ignition System

This repository contains the design files for the valve controller used by CU Spaceflight to control our hybrid rocket engine. It is capable of actuating up to 10x 24W solenoid valves simultaneously and is controlled over RS422 or USB by a GUI.

ChibiOS: ChibiOS RTOS, developed by Giovanni Di Sirio. agg-kicad: KiCAD libraries, footprints and scripts developed by Adam Greig. gen-board.h: Python tool for generating 'board.h' header files for STM32 microcontrollers for use with ChibiOS. m4-gcs: Python GUI used to control and monitor the valve controller, developed by Greg Brooks. pcb: Hardware…

Main components on the Comms

STM32F437VIT6ADP3335MAX14787ERJHSE-538x

Comms bill of materials (BOM)

50 components, 25 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
STM32F437VIT6
IC1
1
ADP3335
IC2
1
MAX14787E
IC3
1
RJHSE-538x
IC4
4
Hole
X5, X6, X8, X9
1
26M
Y1
1
UART1
J1
1
UART2
J2
1
5v In
J3
1
USB-B
P1
1
SWD_TC
P2
1
TESTPAD
TP1
2
LED
D1, D2
7
ESD_DIODE
D3, D4, D5, D6, D7, D8, D9
2
10p
C1, C2
1
4u7
C3
9
100n
C4, C5, C6, C8, C9, C10, C11, C15 +1
1
1u
C7
2
2u2
C12, C13
3
1u
C14, C17, C18
Show 5 more
QtyPartRefs
1
10n
C16
1
100
R1
1
0R
R2
1
120R
R3
4
100R
R4, R5, R6, R7

Comms design files

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

Comms: common questions

What microcontroller does the Comms use?

The Comms is built around the STM32F437VIT6, from the STM32 family.

How big is the Comms PCB?

The Comms measures 80 × 50 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Comms?

50 components, from 25 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 Comms design files?

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

Can I use the Comms 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 Comms 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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