HardLabs

TinyCoinCell

hlord2000·TinyCoinCell

TinyCoinCell PCB layout, top view — open source Nordic nRF board by hlord2000

About the TinyCoinCell PCB

TinyCoinCell is an open source Nordic nRF PCB design by hlord2000, published on GitHub. It is a 4-layer board measuring 23.8 × 24 mm, with 44 components from 30 distinct parts.

Its main chip is the nRF54L15-QFAA, from the Nordic nRF family. Other key parts include the ADXL367 and nPM2100-QEXX. By type, the board carries 22 capacitors, 7 inductors, 7 resistors, 3 ICs, 2 crystals and 1 battery holder.

It belongs with the iot & wireless designs in this gallery.

From the project

TinyCoinCell is a compact KiCad reference design for a coin-cell powered Nordic beacon built around the nRF54L15, optional nPM2100 primary-cell PMIC, and an ADXL367 accelerometer.

TinyCoinCell is a compact KiCad reference design for a coin-cell powered Nordic beacon built around the nRF54L15, optional nPM2100 primary-cell PMIC, and an ADXL367 accelerometer.

- nRF54L15 low-power Bluetooth LE 6 SoC, 1.5 MB NVM, 256 KB RAM, Arm Cortex-M33, and RISC-V coprocessor - Optional nPM2100 primary-cell PMIC with fuel gauge and hibernate support - ADXL367 ultralow-power accelerometer on I2C - CR2032 battery holder - User button and user LED - SWD programming pads and UART breakout pads - 32 MHz HF crystal and 32.768 kHz LF crystal

TinyCoinCell, from the project README
From the project README

Main components on the TinyCoinCell

nRF54L15-QFAAADXL367nPM2100-QEXX

TinyCoinCell bill of materials (BOM)

44 components, 30 distinct parts.

QtyPartRefs
1
nRF54L15-QFAA
U1
1
ADXL367
U2
1
nPM2100-QEXX
U8
1
32MHz
X1
1
32.768kHz
X2
1
Battery_Cell
BT1
1
SW_Push
SW1
1
LED_Small
D1
1
120R/0.2A
FB1
1
4.7uH
L1
1
2.7nH
L2
3
3.5nH
L3, L4, L5
1
2.2uH
L6
4
100nF
C1, C2, C3, C4
1
10uF
C5
1
1.5pF
C6
2
2.2uF
C7, C10
1
3.9pF
C8
1
2.0pF
C9
1
0.3pF
C11
Show 10 more
QtyPartRefs
1
10nF
C12
1
2.2nF
C13
1
1pF
C14
1
10uF
C44
5
1uF
C45, C47, C48, C50, C51
1
22uF
C46
1
2.2uF
C49
3
1kR
R1, R5, R6
1
500R
R2
3
0R
R3, R4, R7

TinyCoinCell design files

The KiCad project lives in the hlord2000/TinyCoinCell repository on GitHub; these links point at the commit this page was built from.

TinyCoinCell: common questions

What microcontroller does the TinyCoinCell use?

The TinyCoinCell is built around the nRF54L15-QFAA, from the Nordic nRF family.

How big is the TinyCoinCell PCB?

The TinyCoinCell measures 23.8 × 24 mm, has 4 copper layers and is 1.5842 mm thick.

How many components are on the TinyCoinCell?

44 components, from 30 distinct parts. The full bill of materials is listed on this page.

Where can I download the TinyCoinCell design files?

From the hlord2000/TinyCoinCell repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the TinyCoinCell design in my own project?

The repository has no license, so all rights stay with hlord2000. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the TinyCoinCell 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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