HardLabs

Tempo bt

rrainey·tempo·hardware/tempo-bt/tempo-bt.kicad_pcb

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

About the Tempo bt PCB

Tempo bt is an open source Microchip SAM PCB design by rrainey, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 58.4 × 54 mm, with 59 components from 45 distinct parts.

Its main chip is the DMP3125L-7, from the Microchip SAM family. Other key parts include the BMP390, SAM-M10Q-00B, MMC5983MA, ICM-42688-V and UBXH13-0000138. By type, the board carries 16 resistors, 14 capacitors, 8 ICs, 4 connectors, 4 switches and 4 LEDs.

From the project

Audible information for skydivers

Core MCU/Module: u‑blox NORA‑B106 (nRF5340) OS: Zephyr RTOS Goal: Provide a canonical, test‑ready mapping of logical nets from the NORA‑B106 to each peripheral IC for driver bring‑up and HW connectivity tests.

Additional compatibility labels seen on sheet:

FLASHMOSI, FLASHMISO, FLASHSCK appear alongside the QSPI set; treat as alternative/legacy SPI naming used at fan‑out or test points.

Main components on the Tempo bt

BMP390SAM-M10Q-00BMMC5983MAICM-42688-VUBXH13-0000138SPX3819M5-L-3-3/TRNORA-B106-00BMCP73831T-4ADI/OT

Tempo bt bill of materials (BOM)

59 components, 45 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
BMP390
U1
1
SAM-M10Q-00B
SAM-M10Q
U2
1
MMC5983MA
U3
1
ICM-42688-V
U4
1
UBXH13-0000138
MX25R64
U5
1
SPX3819M5-L-3-3/TR
U6
1
NORA-B106-00B
U7
1
MCP73831T-4ADI/OT
MCP73831
U8
1
DMP3125L-7
Q1
1
MEM2061-01-188-00-A
X1
1
ABS07-120-32.768KHZ-T
32.768kHz
Y1
1
S2B-PH-SM4-TB
JSTPH
J1
1
USB4105-GF-A-120
USB_C_Receptacle_USB2.0
J2
1
SM04B-SRSS-TB
QWIIC_CONNECTORJS-1MM
J4
1
M50-3500542
2x5 PTH ARM CORTEX DEBUG
J5
1
1056TR
CR1220
B1
1
SMD0805B050TF
500mA, 6V
F1
1
UBXH11-0000058
LTST-C19HE1WT
RGB1
1
JS102011SAQN
SW1
2
UBXH19-0000035
PTS850
SW2, SW3
Show 25 more
QtyPartRefs
1
KMR221NG LFS
RESET
SW4
2
LTST-S270KGKT
LED1, LED3
1
LTST-S270KRKT
LED2
1
LTST-S270YKT
Yellow
LED4
2
UBXH07-0000034
D1, D2
1
BAT20JFILM
1A/23V/620mV
D5
2
VJ0603Y104KCXAT
100nF
C1, C3
3
GRM188Z71A106MA73J
10uF
C2, C4, C8
1
GRT033C81A104KE01D
0.1uF
C5
1
CGA3E2X7R1H103K080AE
10nF
C6
1
GRM188R71A225KE15D
2.2uF
C7
1
UBXH01-2021002
100nF
C9
1
0603DC105KAT2A
1.0UF-0603-16V-10%-X7R
C10
1
GRM188Z71C225KE43D
2.2UF-0603-10V-20%
C11
2
GRM188Z71A475KE15D
4.7UF-0603-6.3V-(10%)
C12, C15
1
GRM21BR71A475KE51L
4.7UF-0805-10V-10%
C13
2
RCC04025K10FKED
5.1k
R1, R2
2
ERJ-H3EF2201V
2.2KOHM-0603-1/10W-1%
R3, R4
3
ERJ-H3EF2201V
2.2K
R5, R9, R10
1
UBXH18-0000269
499OHM-0402
R6
2
UBXH18-0008033
220OHM-0402
R7, R8
3
ERJ-H3EF1002V
10KOHM-0603-1/10W-1%
R11, R13, R14
1
UBXH18-0008113
470KOHM
R12
1
MR06X1001FTL
1K
R15
1
MR06X2001FTL
2.0k
R16

Tempo bt 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 bt: common questions

What microcontroller does the Tempo bt use?

The Tempo bt is built around the DMP3125L-7, from the Microchip SAM family.

How big is the Tempo bt PCB?

The Tempo bt measures 58.4 × 54 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Tempo bt?

59 components, from 45 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 bt 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 bt 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 bt 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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