Hardware
About the Hardware PCB
Hardware is an open source Nordic nRF PCB design by edatki, published on GitHub. It is a 2-layer board measuring 31.5 × 42 mm, with 60 components from 32 distinct parts.
Its main chip is the nRF52840, from the Nordic nRF family. Other key parts include the TP4054-42-SOT25-R, XC6206PxxxMR, LSM6DS3, DS3231MZ and W25Q128JVS. By type, the board carries 27 capacitors, 13 resistors, 7 ICs, 3 transistors, 3 switches and 2 crystals.
It belongs with the wearables and iot & wireless designs in this gallery.
From the project
A WIP minimal smartwatch based on the ESP32-C3
Main components on the Hardware
Hardware bill of materials (BOM)
60 components, 32 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | nRF52840 | Nordic_AQFN-73-1EP_7x7mm_P0.5mm | U1 |
| 1 | TP4054-42-SOT25-R TP4054 | SOT-23-5 | U2 |
| 1 | TP4054-42-SOT25-R MAX17048 | TDFN-8-1EP_2x2mm_P0.5mm_EP0.8x1.2mm | U3 |
| 1 | XC6206PxxxMR | SOT-23-3 | U4 |
| 1 | LSM6DS3 | LGA-14_3x2.5mm_P0.5mm_LayoutBorder3x4y | U5 |
| 1 | DS3231MZ | SOIC-8_3.9x4.9mm_P1.27mm | U6 |
| 1 | W25Q128JVS | SOIC-8_5.23x5.23mm_P1.27mm | U7 |
| 2 | AO3401A | SOT-23 | Q1, Q4 |
| 1 | AO3400A | SOT-23 | Q2 |
| 1 | 32MHz 8pF ±10ppm | Crystal_SMD_2016-4Pin_2.0x1.6mm | Y1 |
| 1 | 32.768kHz 6pF ±20ppm | Crystal_SMD_3215-2Pin_3.2x1.5mm | Y2 |
| 1 | USB_C_Receptacle_USB2.0 | USB_C_Receptacle_G-Switch_GT-USB-7010ASV | J1 |
| 1 | LCD | Molex_54548-1071_1x10-1MP_P0.5mm_Horizontal | J2 |
| 3 | SW_Push | Panasonic_EVQPUL_EVQPUC | SW1, SW2, SW3 |
| 1 | 1N5819WS | D_SOD-323 | D1 |
| 1 | 4n7 | L_0402_1005Metric | L1 |
| 1 | 15u | L_0603_1608Metric | L3 |
| 9 | 1u | C_0402_1005Metric | C1, C12, C21, C22, C31, C34, C35, C36 +1 |
| 2 | 12p | C_0402_1005Metric | C2, C3 |
| 1 | 47n | C_0603_1608Metric | C4 |
Show 12 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 820p | C_0402_1005Metric | C5 |
| 1 | 0p5 | C_0402_1005Metric | C6 |
| 2 | 100p | C_0402_1005Metric | C7, C20 |
| 5 | 100n | C_0402_1005Metric | C8, C14, C15, C18, C19 |
| 1 | 0p8 | C_0402_1005Metric | C9 |
| 3 | 4u7 | C_0402_1005Metric | C10, C11, C13 |
| 2 | 6p8 | C_0402_1005Metric | C16, C17 |
| 1 | 27R 5K1 | R_0402_1005Metric | R1 |
| 1 | 5K1 | R_0402_1005Metric | R2 |
| 7 | 10K | R_0402_1005Metric | R3, R4, R6, R7, R8, R14, R15 |
| 3 | 100K | R_0402_1005Metric | R5, R10, R11 |
| 1 | 2K2 | R_0402_1005Metric | R9 |
Hardware design files
The KiCad project lives in the edatki/Quectowatch repository on GitHub; these links point at the commit this page was built from.
Hardware: common questions
What microcontroller does the Hardware use?
The Hardware is built around the nRF52840, from the Nordic nRF family.
How big is the Hardware PCB?
The Hardware measures 31.5 × 42 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Hardware?
60 components, from 32 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 Hardware design files?
From the edatki/Quectowatch 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 Hardware design in my own project?
The repository has no license, so all rights stay with edatki. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Hardware 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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