HardLabs

Tempo

rrainey·tempo·hardware/tempo/tempo.kicad_pcb

Tempo PCB layout, top view — open source Microchip SAM board by rrainey

About the Tempo PCB

Tempo is an open source Microchip SAM PCB design by rrainey, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 58.4 × 54 mm, with 55 components from 39 distinct parts.

Its main chip is the DMP3125L, from the Microchip SAM family. Other key parts include the BMP390, SAM-M10Q-00B, ICM-42688-V, MMC5983MA and SPX3819M5-L-3-3/TR. By type, the board carries 22 capacitors, 10 resistors, 7 ICs, 4 connectors, 4 LEDs and 2 crystals.

It belongs with the sensors, audio and rf & radio designs in this gallery.

From the project

Audible information for skydivers

This repository is a collection point for a number of jump logging devices I designed for skydivers.

Three boards are part of the Tempo project: Tempo-BT, Tempo, and Peakick. All three explore modern sensor ICs for use in skydiving. The Peakick board is more research oriented. Peakick is design as a daughter board for experimentation with a range of microcontroller boards. It is most easily connected to SparkFun "Thing Plus" form factor boards, although it can be connected to almost any modern MCU/SOC board designed for 3.3V peripherals.

Tempo, from the project README
From the project README

Main components on the Tempo

BMP390SAM-M10Q-00BICM-42688-VMMC5983MASPX3819M5-L-3-3/TRATSAMD51J20A-AUTMCP73831T-4ADI/OT

Tempo bill of materials (BOM)

55 components, 39 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
BMP390
U1
1
SAM-M10Q-00B
SAM-M10Q
U2
1
ICM-42688-V
U3
1
MMC5983MA
U4
1
SPX3819M5-L-3-3/TR
U5
1
ATSAMD51J20A-AUT
ATSAMD51J20A-A
U6
1
MCP73831T-4ADI/OT
MCP73831
U7
1
DMP3125L
Q1
1
MEM2061-01-188-00-A
X2
1
FC-135 32.7680KA-A5
32.768kHz
Y1
1
S2B-PH-SM4-TB
JSTPH
J1
1
3221-10-0300-00-TR
J2
1
SM04B-SRSS-TB
QWIIC_CONNECTORJS-1MM
J3
1
10103594-0001LF
J4
1
1056TR
CR1220
B1
1
KMR221 LFS
RESET
S1
1
JS102011SAQN
SW1
2
LTST-S270KGKT
LED1, LED3
1
LTST-S270KRKT
LED2
1
LTST-S270YKT
Yellow
LED4
Show 19 more
QtyPartRefs
1
LTST-S270YKT
1A/23V/620mV
D1
1
BLM18RK221SN1D
220 Ω FERRITE
L1
1
10uF
C1
2
100nF
C2, C3
1
0.1uF
C4
1
10nF
C5
1
2.2uF
C6
2
10uF
C7, C8
2
15PF-0402-50V-5%
C9, C10
1
1.0UF-0603-16V-10%-X7R
C11
6
0.1UF-0402-16V-10%
C12, C13, C14, C15, C17, C20
1
2.2UF-0603-10V-20%
C16
1
10UF-0805-10V-10%
C18
3
4.7UF-0603-6.3V-(10%)
C19, C21, C22
3
2.2K
R1, R2, R3
3
10KOHM-0603-1/10W-1%
R6, R7, R8
1
1K
R9
1
2.0k
R11
2
2.2KOHM-0603-1/10W-1%
R12, R13

Tempo design files

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

Tempo: common questions

What microcontroller does the Tempo use?

The Tempo is built around the DMP3125L, from the Microchip SAM family.

How big is the Tempo PCB?

The Tempo measures 58.4 × 54 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Tempo?

55 components, from 39 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 Tempo design files?

From the rrainey/tempo 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 Tempo design in my own project?

Yes, under the terms of its GPL-3.0 license, which rrainey chose for the repository.

Can I test firmware for the Tempo 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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