HardLabs

ULP-Wearable-Module

MarcusFunt·ULP-Wearable-Module·hardware/kicad/ULP-WM/ULP_Wearable_Module_Preliminary.kicad_sch

This repository ships a schematic but no board layout.

About the ULP-Wearable-Module

ULP-Wearable-Module is an open source Nordic nRF PCB design by MarcusFunt, published on GitHub. It is a board, with 72 components from 53 distinct parts.

Its main chip is the NRF54L15-QFAA-R7, from the Nordic nRF family. Other key parts include the nPM1300-QEAA-R7, BMI270, MCP9808T-E/MC (0x18), MCP9808T-E/MC (0x19) and DRV2605LDGSR. By type, the board carries 29 capacitors, 10 test points, 10 resistors, 6 ICs, 6 connectors and 4 inductors.

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

From the project

Open ULPWearableModulePreliminary.kicadpro in KiCad 10 or newer. The generated ULPWearableModulePreliminary.net` is the corresponding KiCad S-expression netlist.

Open ULPWearableModulePreliminary.kicadpro in KiCad 10 or newer. The generated ULPWearableModulePreliminary.net` is the corresponding KiCad S-expression netlist.

The schematic is a connected architecture and bring-up draft. It contains six hierarchical sheets:

1. USB-C/battery input, protection, nPM1300-QEAA, 1.8 V and 3.3 V buck rails. 2. nRF54L15-QFAA, reference decoupling, crystals, RF network, and status LED. 3. BMI270 and two independently addressed MCP9808 sensors on the 3.3 V I2C bus. 4. DRV2605L closed-loop ERM/LRA haptic driver and actuator connector. 5. Molex 226276-0202 expansion…

Main components on the ULP-Wearable-Module

NRF54L15-QFAA-R7nPM1300-QEAA-R7BMI270MCP9808T-E/MC (0x18)MCP9808T-E/MC (0x19)DRV2605LDGSR

ULP-Wearable-Module bill of materials (BOM)

72 components, 53 distinct parts.

QtyPartRefs
1
NRF54L15-QFAA-R7
U1
1
nPM1300-QEAA-R7
U2
1
BMI270
U3
1
MCP9808T-E/MC (0x18)
U4
1
MCP9808T-E/MC (0x19)
U5
1
DRV2605LDGSR
U6
1
32MHz CL=8pF +/-40ppm
Y1
1
32.768kHz CL=9pF +/-20ppm
Y2
1
UJC-H-G1-SMT-P6-TR-67
J1
1
1S LiPo: BAT+, GND, NTC
J2
1
226276-0202 EXPANSION
J5
1
ARM CORTEX 10-PIN SWD
J6
1
UART: VREF, GND, TX, RX
J7
1
LRA/ERM HAPTIC ACTUATOR
J8
1
2.4GHz antenna - select with layout
AE1
1
500mA PTC - TBD
F1
1
RESET
SW1
1
VBAT
TP1
1
VDD_3V3
TP2
1
VDD_1V8
TP3
Show 33 more
QtyPartRefs
1
VDD_3V3_RF_OPT
TP4
1
GND
TP5
1
I2C_SDA
TP6
1
I2C_SCL
TP7
1
PMIC_INT
TP8
1
SWDIO
TP9
1
SWCLK
TP10
1
5V low-leakage TVS - TBD
D1
1
STATUS
D2
2
2.2u
L1, L2
1
4.7u 120mA
L3
1
3.5n RF reference
L4
2
1u 10V X5R
C1, C5
7
10u 25V X5R
C2, C3, C4, C7, C8, C9, C10
1
2.2u 16V X7R
C6
1
10u 6.3V X6S
C11
8
100n 10V X7R
C12, C13, C20, C21, C22, C23, C31, C35
1
1.5p C0G high-Q
C18
1
2.0p C0G high-Q
C19
1
4.7u 6.3V X5R
C24
2
1u 10V X5R
C27, C28
1
10u
C29
1
100n
C30
2
2.2u 2.5V X6T
C33, C34
1
47u 6.3V low-ESR
C36
1
47k 1%
R1
1
330k 1%
R2
1
0R CURRENT MEASURE LINK
R3
1
1k
R4
2
4.7k 1%
R5, R6
1
10k 1%
R7
2
100k 1%
R8, R10
1
10k
R9

ULP-Wearable-Module design files

The KiCad project lives in the MarcusFunt/ULP-Wearable-Module repository on GitHub; these links point at the commit this page was built from.

ULP-Wearable-Module: common questions

What microcontroller does the ULP-Wearable-Module use?

The ULP-Wearable-Module is built around the NRF54L15-QFAA-R7, from the Nordic nRF family.

How many components are on the ULP-Wearable-Module?

72 components, from 53 distinct parts. The full bill of materials is listed on this page.

Where can I download the ULP-Wearable-Module design files?

From the MarcusFunt/ULP-Wearable-Module repository on GitHub, which has the schematic; the links under Design files point to each one.

Can I use the ULP-Wearable-Module design in my own project?

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

Can I test firmware for the ULP-Wearable-Module without the hardware?

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

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