FindMyCharger
About the FindMyCharger PCB
FindMyCharger is an open source Nordic nRF PCB design by dave9123, published on GitHub. It is a 4-layer board measuring 74 × 56 mm, with 189 components from 71 distinct parts.
Its main chip is the NRF54L10-QFAA-R7, from the Nordic nRF family. Other key parts include the TPS25730DREFR, BQ25713RSNR, TPS25762DQRQLRQ1, BQ4050RSMR and AT24C256C-SSHL-T. By type, the board carries 86 capacitors, 63 resistors, 11 diodes, 9 transistors, 7 inductors and 6 ICs.
It belongs with the iot & wireless and power & battery designs in this gallery.
From the project
Smart powerbank with finding capabilities!
A smart powerbank with locating capabilities through Apple FindMy network
- Low power at 10mA BLE transmission at +8dBm - Charging input/output up to 60W - 5 LED battery indicator
There were 2 consecutive bicycle robbery that happened near where I live which got me curious, where do they place them at? With this, no SIM card nor GPS needed (which saves energy and mobile credits)!
Main components on the FindMyCharger
FindMyCharger bill of materials (BOM)
189 components, 71 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TPS25730DREFR | REF0038A-MFG | U1 |
| 1 | BQ25713RSNR | RSN32_TEX | U2 |
| 1 | TPS25762DQRQLRQ1 | RQL0029A-MFG | U3 |
| 1 | NRF54L10-QFAA-R7 nRF54L10-QFXX | QFN-48-1EP_6x6mm_P0.4mm_EP4.6x4.6mm_ThermalVias | U4 |
| 1 | BQ4050RSMR | VQFN-32_L4.0-W4.0-P0.40-TL-EP1.4 | U5 |
| 1 | AT24C256C-SSHL-T | SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL | U6 |
| 7 | QNM30N20AJ Q_NMOS | QNM30N20AJ-PDFN-8L_L3.3-W3.3-P0.65-BL_XINFEIHONG_FH1404G6 | Q1, Q2, Q4, Q5, Q7, Q8, Q9 |
| 2 | C53433530 Q_PMOS | ZC015P2G-POWERTDFN-8_L3.1-W3.1-P0.65-LS3.3-BL | Q3, Q6 |
| 1 | XTM20032000DT00351005 32MHz | CRYSTAL-SMD_4P-L2.0-W1.6-BL-A | X1 |
| 2 | USB_C_RECEPTACLE_USB2.0_16P USB_C_Receptacle_USB2.0_16P | USB-C-SMD_TYPE-C16PIN | J1, J2 |
| 2 | SW_Push | SW_PUSH_6mm | SW1, SW3 |
| 1 | SW_Push | SolderWire-0.127sqmm_1x02_P3.7mm_D0.48mm_OD1mm | SW2 |
| 1 | 10K 10k | SolderWire-0.127sqmm_1x02_P3.7mm_D0.48mm_OD1mm | TH1 |
| 2 | 30V hongjiacheng | D_SOT-23 | D1, D3 |
| 4 | H5VU25U hongjiacheng | DFN2510-10_L2.5-W1.0-P0.50-BL | D2, D4, D5, D6 |
| 5 | LED | LED_0603_1608Metric | D7, D8, D9, D10, D11 |
| 1 | BLM18PG121SN1D 120 | L_0603_1608Metric | FB1 |
| 1 | YSPI0630A-2R2M 2.2uH | IND-SMD_L7.1-W6.6 | L1 |
| 1 | XR0640-4R7M 4.7uH | IND-SMD_L7.0-W6.6 | L2 |
| 1 | 4.7UH 4.7uH | IND-SMD_L7.0-W6.6 | L3 |
Show 51 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LQP03HQ2N7B02D 2.7nH | L_0201_0603Metric | L4 |
| 2 | LQP03HQ3N5B02D 3.5nH | L_0201_0603Metric | L5, L6 |
| 3 | 10UF 10uF | C_0402_1005Metric | C1, C30, C46 |
| 20 | 0.1UF 0.1uF | C_0402_1005Metric | C2, C3, C11, C26, C37, C38, C48, C49 +12 |
| 15 | 10UF 10uF | C_0805_2012Metric | C4, C5, C6, C7, C8, C9, C10, C12 +7 |
| 5 | 22UF 22uF | C_0805_2012Metric | C13, C14, C66, C67, C82 |
| 1 | 10NF 10nF | C_0402_1005Metric | C22 |
| 2 | 1NF 1nF | C_0402_1005Metric | C23, C50 |
| 2 | 47NF 47nF | C_0603_1608Metric | C24, C25 |
| 3 | 330PF 330pF | C_0402_1005Metric | C27, C28, C36 |
| 2 | 1UF 1uF | C_0402_1005Metric | C29, C35 |
| 2 | 33NF 33nF | C_0603_1608Metric | C31, C32 |
| 4 | 4.7UF 4.7uF | C_0402_1005Metric | C33, C62, C73, C78 |
| 3 | 470NF 470nF | C_0603_1608Metric | C34, C55, C86 |
| 1 | 33PF 33pF | C_0402_1005Metric | C39 |
| 1 | 15PF 15pF | C_0402_1005Metric | C40 |
| 1 | 1.8NF 1.8nF | C_0402_1005Metric | C41 |
| 1 | 680PF 680pF | C_0603_1608Metric | C42 |
| 7 | CC0603KRX7R9BB104 100nF | C_0603_1608Metric | C43, C44, C45, C47, C63, C74, C79 |
| 1 | 3.3NF 3.3nF | C_0402_1005Metric | C51 |
| 4 | 2.2UF 2.2uF | C_0805_2012Metric | C54, C59, C61, C80 |
| 1 | 10NF 10nF | C_0201_0603Metric | C60 |
| 1 | TCN4107M035R0100E 100uF | CAP-SMD_L7.3-W6.1_TCN4227M025R0100 | C68 |
| 1 | 1.5PF 1.5pF | C_0201_0603Metric | C75 |
| 1 | GJM0335C1E2R0WB01 2pF | C_0201_0603Metric | C76 |
| 1 | 0.3PF 0.3pF | C_0201_0603Metric | C77 |
| 2 | CL10C331JB8NNNC 330pF | C_0402_1005Metric | C81, C88 |
| 1 | 2PF 2pF | C_0201_0603Metric | C85 |
| 3 | 10M 10m | R_1206_3216Metric | R1, R2, R50 |
| 2 | 4.7 | R_0603_1608Metric | R3, R4 |
| 1 | 1 | R_0402_1005Metric | R5 |
| 4 | 10 | R_0402_1005Metric | R6, R7, R17, R48 |
| 9 | 10K 10k | R_0805_2012Metric | R9, R15, R16, R18, R19, R25, R26, R30 +1 |
| 1 | 160K 160k | R_0603_1608Metric | R10 |
| 5 | 220K 220k | R_0402_1005Metric | R11, R13, R21, R23, R60 |
| 2 | 40.2K 40.2k | R_0603_1608Metric | R14, R24 |
| 1 | 390K 390k | R_0603_1608Metric | R20 |
| 1 | 137K 137k | R_0603_1608Metric | R22 |
| 1 | 300 | R_1206_3216Metric | R27 |
| 3 | 10M | R_0402_1005Metric | R28, R29, R32 |
| 3 | 5.1K 5.1k | R_0402_1005Metric | R33, R34, R36 |
| 9 | 100 | R_0402_1005Metric | R35, R41, R45, R47, R49, R51, R52, R55 +1 |
| 4 | 0805W8F220KT5E 2.2 | R_0805_2012Metric | R37, R38, R39, R40 |
| 6 | 4.7K 4.7k | R_0402_1005Metric | R42, R43, R44, R58, R59, R62 |
| 1 | 0 | R_0603_1608Metric | R46 |
| 1 | 1m | R_1206_3216Metric | R53 |
| 2 | 200 | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R54, R63 |
| 1 | 1k | R_0603_1608Metric | R56 |
| 1 | 5.6K 5.6k | R_0402_1005Metric | R57 |
| 1 | 0402WGF100JTCE 10 | R_0402_1005Metric | R61 |
| 1 | 22K 22k | R_0402_1005Metric | R65 |
FindMyCharger design files
The KiCad project lives in the dave9123/FindMyCharger repository on GitHub; these links point at the commit this page was built from.
FindMyCharger: common questions
What microcontroller does the FindMyCharger use?
The FindMyCharger is built around the NRF54L10-QFAA-R7, from the Nordic nRF family.
How big is the FindMyCharger PCB?
The FindMyCharger measures 74 × 56 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the FindMyCharger?
189 components, from 71 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 FindMyCharger design files?
From the dave9123/FindMyCharger 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 FindMyCharger design in my own project?
The repository has no license, so all rights stay with dave9123. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the FindMyCharger 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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