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System

stanford-ssi·samwise-avionics·system/system.kicad_pcb

This repository ships a schematic but no board layout.
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About the System PCB

System is an open source Raspberry Pi PCB design by stanford-ssi, published on GitHub. It is a 2-layer board, with 61 components from 56 distinct parts.

Its main chip is the 35362-0450, from the Raspberry Pi family. Other key parts include the TPS54226PWPR, LT3652 (simplified), EP2W+ and BQ25883RGER. By type, the board carries 35 connectors, 8 resistors, 7 switches, 4 ICs, 4 transistors and 2 capacitors.

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

From the project

Avionics for 2U Rev of Sputnik Satellite

Main components on the System

TPS54226PWPRLT3652 (simplified)EP2W+BQ25883RGER

System bill of materials (BOM)

61 components, 56 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
TPS54226PWPR
TPS54226 (simplified)
U5
1
LT3652 (simplified)
U6
1
EP2W+
U13
1
BQ25883RGER
BQ25883 (simplified)
U17
1
BQ25883_BATFET
Q1
1
DMP2040USS-13
Q2
1
MMBT2222A
Q3
1
MMBT2222AT
IRLML2803
Q7
1
503182-1852
Battery Board A
J1
1
CONN_ARM_JTAG_SWD_10
Battery Board B
J2
1
35362-0850
X+ Panel
J3
1
35362-0850
X- Panel
J4
1
35362-1250
Z+ Panel
J5
1
35362-0950
Z- Panel
J6
1
AMPHENOL_901-144
Y+ Panel
J7
1
1985807
Y- Panel
J8
1
1985807
Interface Board
J9
1
35362-0450
Raspberry Pi 4
J10
1
Arducam Multiplexer
J11
1
35362-0550
Earth Facing Camera
J12
Show 36 more
QtyPartRefs
1
Selfie Camera
J13
1
CONN_01X08_HORIZONTAL
Startracker Camera
J14
1
35362-0550
MPPT Add-on
J15
1
1985807
WPC.25A
J16
1
35362-0450
High A
J17
1
1985807
High B
J18
1
35362-0650
Low A
J19
1
35362-0750
Low B
J20
1
35362-0750
Motor Board
J21
1
X+ Sun Pyramid
J22
1
X- Sun Pyramid
J23
2
GPS
J24, J25
1
Magnetorquer X+
J26
1
Magnetorquer X-
J27
1
Magnetorquer Y+
J28
1
Magnetorquer Y-
J29
1
Magnetorquer Z+
J30
1
Magnetorquer Z-
J31
1
Motor 1
J32
1
Motor 2
J33
1
Motor 3
J34
1
Motor 4
J35
4
INT_RBF
SW1, SW2, SW3, SW4
1
EXT_RBF (2 or 3-way)
SW5
2
EXT_RBF
SW6, SW7
1
DFLS130L
CMSH1-40M
D4
1
10nF
C64
1
4.7uF
C65
1
0.02
R7
1
0.02
R8
1
510K
10k
R17
1
10K
10k
R22
1
10K
10k
R29
1
4.7k
R67
1
100K
10k
R68
1
100K
3.3k
R69

System design files

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

System: common questions

What microcontroller does the System use?

The System is built around the 35362-0450, from the Raspberry Pi family.

How big is the System PCB?

The System has 2 copper layers and is 1.6 mm thick.

How many components are on the System?

61 components, from 56 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 System design files?

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

Can I use the System design in my own project?

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

Can I test firmware for the System without the hardware?

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

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