4 layers96 × 99.2 mm
Panel
cheyao/nrf54l15-discovery
nRF54L15 Discovery board for low-power BLE prototyping
419 parts18CERN-OHL-P-2.0
4 layers23.8 × 4 mm
TinyCoinCell
hlord2000/TinyCoinCellTinyCoinCell 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.
- Size
- 23.8 × 4 mm
- Copper layers
- 4
- Thickness
- 1.58 mm
- Parts
- 51
- Nets
- 61
- Pads
- 268
- Tracks, vias
- 441, 73
- Pours
- 12
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 3 Jun 2026
- Updated
- 23 Jun 2026
Overview
TinyCoinCell is an open-source printed circuit board by hlord2000, from the hlord2000/TinyCoinCell repository on GitHub. It is a 4-layer board of 23.8 × 4 mm with 51 parts on 61 nets, routed with 441 tracks and 73 vias.
It is built around the NRF54L15-QFAA-R. Its parts include 22 capacitors, 7 resistors, 6 inductors, 3 ICs and 2 crystals. It belongs with the nRF52 and nRF5x boards of this library.
Main components
1README
README.mdTinyCoinCell
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.
Hardware
- 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
Assembly Variants
| Variant | Populate | Do not populate | Notes |
|---|---|---|---|
nPM2100 | U8, C44-C47, C49, L6, R3 | R4, R7 | Button is connected to the nPM2100 ship-button input. The host can observe it through nPM2100.GPIO0 on P1.05. |
No nPM2100 | R4, R7 | U8, C44-C47, C49, L6, R3 | Battery powers the board directly and the user button is connected to P1.11. |
Both variants omit the test pads from production placement files. The KiCad
variants also override R5 and R6 to 4.7kR.
Pinout
| Function | nRF54L15 pin |
|---|---|
| User LED | P1.02 |
| I2C SDA | P1.03 |
| I2C SCL | P1.04 |
| nPM2100 GPIO0 | P1.05 |
| User button, no-nPM2100 variant | P1.11 |
| UART TX | P2.00 |
| UART RX | P2.02 |
This project uses symbols and footprints from nordic-lib-kicad
Release Artifacts
The v2 release is built from the contents of the local build/ directory.
It includes the rendered board images, schematic PDF, STEP model, Gerbers, BOMs,
placement files, KiCad ERC/DRC reports, and the generated design-review bundle.
Parts
51| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | TestPoint | TestPoint:TestPoint_Pad_D1.0mm | TP1, TP2, TP3, TP4, TP5, TP6, TP7 |
| 5 | 1uF | Capacitor_SMD:C_0201_0603Metric | C45, C47, C48, C50, C51 |
| 4 | 100nF | passives:C_0201_0603Metric_L | C1, C2, C3, C4 |
| 3 | 0R | Resistor_SMD:R_0402_1005Metric | R3, R4, R7 |
| 3 | 1kR | passives:R_0201_0603Metric_L | R1, R5, R6 |
| 3 | 3.5nH | passives:L_0201_0603Metric_L | L3, L4, L5 |
| 2 | 2.2uF | passives:C_0201_0603Metric_L | C7, C10 |
| 1 | 0.3pF | passives:C_0201_0603Metric_L | C11 |
| 1 | 1.5pF | passives:C_0201_0603Metric_L | C6 |
| 1 | 10nF | passives:C_0201_0603Metric_L | C12 |
| 1 | 10uF | passives:C_0402_1005Metric_L | C5 |
| 1 | 10uF | Capacitor_SMD:C_0402_1005Metric | C44 |
| 1 | 120R/0.2A | passives:L_0201_0603Metric_L | FB1 |
| 1 | 1pF | passives:C_0201_0603Metric_L | C14 |
| 1 | 2.0pF | passives:C_0201_0603Metric_L | C9 |
| 1 | 2.2nF | passives:C_0201_0603Metric_L | C13 |
| 1 | 2.2uF | Capacitor_SMD:C_0201_0603Metric | C49 |
| 1 | 2.2uH | Inductor_SMD:L_0603_1608Metric | L6 |
| 1 | 2.7nH | passives:L_0201_0603Metric_L | L2 |
| 1 | 22uF | Capacitor_SMD:C_0402_1005Metric | C46 |
| 1 | 3.9pF | passives:C_0201_0603Metric_L | C8 |
| 1 | 32.768kHz | Crystal:Crystal_SMD_2012-2Pin_2.0x1.2mm | X2 |
| 1 | 32MHz | Crystal:Crystal_SMD_2016-4Pin_2.0x1.6mm | X1 |
| 1 | 4.7uH | passives:L_0603_1608Metric_L | L1 |
| 1 | 500R | Resistor_SMD:R_0402_1005Metric | R2 |
| 1 | ADXL367 | TinyCoinCell:ADXL367_LGA-12_2.11x2.21mm_P0.5mm_LayoutBorder2x4y | U2 |
| 1 | Battery_Cell | easyeda2kicad:BAT-TH_BAT-HLD-001-THM_1 | BT1 |
| 1 | LED_Small | LED_SMD:LED_0603_1608Metric | D1 |
| 1 | SW_Push | Button_Switch_SMD:SW_Push_1P1T_NO_Vertical_Wuerth_434133025816 | SW1 |
| 1 | nPM2100-QEXX | Package_DFN_QFN:UQFN-16-1EP_4x4mm_P0.65mm_EP2.6x2.6mm_ThermalVias | U8 |
| 1 | nRF54L15-QFAA | Package_DFN_QFN:QFN-48-1EP_6x6mm_P0.4mm_EP4.6x4.6mm_ThermalVias | U1 |
Questions
How big is the TinyCoinCell PCB?
It measures 23.8 × 4 mm and has 4 copper layers, 1.58 mm thick.
What parts does the TinyCoinCell use?
51 parts, built around the NRF54L15-QFAA-R. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the TinyCoinCell KiCad files?
From the hlord2000/TinyCoinCell repository on GitHub, at the commit this page was made from: the board is TinyCoinCell.kicad_pcb and its schematic TinyCoinCell.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the TinyCoinCell design in my own project?
Its repository states no licence, so its author keeps all rights: ask hlord2000 before reusing the design.
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