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ATmega SAT

spel-uchile·balloon_experiment·SENSOR_MODULE/ATmega_SAT.kicad_pcb

ATmega SAT PCB layout, top view — open source Microchip SAM board by spel-uchile
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About the ATmega SAT PCB

ATmega SAT is an open source Microchip SAM PCB design by spel-uchile, published on GitHub. It is a 2-layer board measuring 96 × 89.9 mm, with 65 components from 45 distinct parts.

Its main chip is the ATSAMD21G18A-AUT, from the Microchip SAM family. Other key parts include the Payload, 74AHC1G125 and AP2112K-3.3. By type, the board carries 32 connectors, 11 resistors, 8 capacitors, 4 ICs, 4 diodes and 1 transistor.

It belongs with the science & space and sensors designs in this gallery.

From the project

Radiosonde platform to develop, test and integrate payloads for the future CubeSats missions

This repository contains the software and the PCB designs of a radiosonde. This radiosonde is used as a platform to test and integrate payloads for the future CubeSat missions. Version 4.0 complies with the PC104 board standard for CubeSats. The balloon's software architecture uses a command pattern with a ZMQ data format.

The OBC of the radiosonde consists on a PC104 PCB board compatible with the design specification of the SUCHAI CubeSat. The shape of the board considers spaces to improve the cable management inside the radiosonde. The board has some socket pins to connect either a…

ATmega SAT, from the project README
From the project README

Main components on the ATmega SAT

PayloadATSAMD21G18A-AUT74AHC1G125AP2112K-3.3

ATmega SAT bill of materials (BOM)

65 components, 45 distinct parts.

QtyPartRefs
1
Payload
U1
1
ATSAMD21G18A-AUT
U2
1
74AHC1G125
U3
1
AP2112K-3.3
U4
1
2N7002
Q1
1
32.768 kHz
Y1
1
BAT_JUMPER
J1
1
USB_B_Micro
J8
1
Jumper OBC 3V3
J9
1
Jumper OBC Vin
J10
1
Jumper EPS VBAT
J11
1
Jumper VSTK VBAT
J12
1
Jumper LEDs 3V3
J13
1
Vin
J14
1
Jumper USB 3V3
J15
1
Vin 3v3
J16
1
Conn_01x06_Male_Bootloader
J17
1
Conn_01x08_Female
J19
1
Conn_01x08_Male
J21
4
Conn_01x04_UART
J22, J23, J24, J25
Show 25 more
QtyPartRefs
2
Conn_01x04_Male
J26, J29
3
Conn_01x03_Male
J31, J32, J33
1
Micro_SD_Card
J36
2
Conn_01x04_MPU-9290
J37, J41
1
Conn_01x06_Female
J38
1
Conn_01x04_BMP180
J39
1
Conn_01x04_BME280
J40
1
Conn_01x04_GPS
J43
3
Conn_01x06_Male
J44, J45, J46
1
Polyfuse_Small
F1
1
SW_Push
SW1
1
2.5A / 30V
e1
1
BLUE
D1
1
RED
D2
1
GREEN
D3
1
YELLOW
D4
1
FB - 30 Ohm
L1
2
15pF
C1, C2
4
0.1uF
C3, C4, C5, C6
1
1.0uF
C7
1
2.2uF
C8
1
10k
R1
5
330
R2, R4, R5, R6, R8
4
100k
R3, R9, R10, R11
1
47k
R7

ATmega SAT design files

The KiCad project lives in the spel-uchile/balloon_experiment repository on GitHub; these links point at the commit this page was built from.

ATmega SAT: common questions

What microcontroller does the ATmega SAT use?

The ATmega SAT is built around the ATSAMD21G18A-AUT, from the Microchip SAM family.

How big is the ATmega SAT PCB?

The ATmega SAT measures 96 × 89.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the ATmega SAT?

65 components, from 45 distinct parts. The full bill of materials is listed on this page.

Where can I download the ATmega SAT design files?

From the spel-uchile/balloon_experiment repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the ATmega SAT design in my own project?

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

Can I test firmware for the ATmega SAT without the hardware?

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

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