HardLabs

Only Tag

andrewo3·pangotag-pcb

Only Tag PCB layout, top view — open source STM32 board by andrewo3

About the Only Tag PCB

Only Tag is an open source STM32 PCB design by andrewo3, published on GitHub. It is a 6-layer board measuring 31.9 × 27.2 mm, with 77 components from 42 distinct parts.

Its main chip is the STM32U585RITXQ, from the STM32 family. Other key parts include the TLV3691IDPFR, TPS62840DLCR, TS3A5018RSVR, NSEC3T016-IT and SN74AUP1G08DPWR. By type, the board carries 33 capacitors, 14 ICs, 14 resistors, 4 transistors, 4 diodes and 4 inductors.

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

From the project

KiCad 10 project for a GNSS and motion tracking tag for the white-bellied pangolin, built in the Harvard Microrobotics Laboratory.

KiCad 10 project for a GNSS and motion tracking tag for the white-bellied pangolin, built in the Harvard Microrobotics Laboratory.

PangotagPCBLCSCcompat4.kicadpcb is the V2 tag: a 31.94 × 27.18 mm, 6-layer, 1.6 mm board with 80 parts on both sides, using parts that JLCPCB stocks.

- STM32U575 microcontroller (LQFP-64) and a 32 GB eMMC on the underside - u-blox MAX-M10S GNSS module with a U.FL antenna connector - BMI270 IMU, BMP581 pressure sensor, T117 temperature sensor and LTC2944 coulomb counter on one I2C bus - Two TPS62840 buck converters for always-on 1.9 V and 3.3 V rails, fed from a…

Only Tag, from the project README
From the project README

Main components on the Only Tag

TLV3691IDPFRTPS62840DLCRTS3A5018RSVRNSEC3T016-ITSN74AUP1G08DPWRMAX-M10SLTC2941IDCB-1#TRMPBFSTM32U585RITXQAS6221T-AWLTBMP581BMI270

Only Tag bill of materials (BOM)

77 components, 42 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
TLV3691IDPFR
IC1, IC2
2
TPS62840DLCR
IC3, IC4
2
TS3A5018RSVR
IC5, IC6
1
NSEC3T016-IT
U2
1
SN74AUP1G08DPWR
U3
1
MAX-M10S
U4
1
LTC2941IDCB-1#TRMPBF
ADI(亚德诺)
U7
1
STM32U585RITXQ
STM32U585RITxQ
U8
1
AS6221T-AWLT
U11
1
BMP581
U14
1
BMI270
U16
4
PMX100UNZ
Q1, Q2, Q3, Q4
1
CM9V-T1A-32.768KHZ-7PF-20PPM-TA-QC
Y1
1
USB_C_Receptacle
J1
1
Conn_Coaxial
J2
1
CONN_01X02
Conn_01x02
J5
1
XZCM2CRK53WA-1VF
D1
1
XZCM2CYK53WA-1VF
D2
1
XZCDGK53W-1VF
D3
1
XZCFBB53W-1VF
D4
Show 22 more
QtyPartRefs
1
100N
27n
L1
3
2.2U
2.2u
L5, L6, L7
14
100N
100n
C1, C2, C3, C10, C15, C18, C20, C21 +6
1
10n
C4
2
4.7U
4.7u
C7, C8
1
0.1U
0.1u
C13
2
8p
C16, C17
5
10U
10u
C22, C24, C25, C30, C35
5
100n
C26, C27, C28, C31, C32
1
1u
C38
2
2.2U
2.2u
C41, C42
2
10K
10k
R1, R2
2
5.1K
5.1k
R3, R4
1
56K
10
R5
1
900
R6
1
725
R7
2
325
R8, R9
1
267K
267k
R13
1
1M
R15
1
500K
500k
R16
1
80M
R21
1
10M
R22

Only Tag design files

The KiCad project lives in the andrewo3/pangotag-pcb repository on GitHub; these links point at the commit this page was built from.

Only Tag: common questions

What microcontroller does the Only Tag use?

The Only Tag is built around the STM32U585RITXQ, from the STM32 family.

How big is the Only Tag PCB?

The Only Tag measures 31.9 × 27.2 mm, has 6 copper layers and is 1.6 mm thick.

How many components are on the Only Tag?

77 components, from 42 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 Only Tag design files?

From the andrewo3/pangotag-pcb repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Only Tag design in my own project?

The repository has no license, so all rights stay with andrewo3. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Only Tag 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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