HardLabs

Tapt

grimsteel·tapt·pcb/tapt.kicad_pcb

Tapt PCB layout, top view — open source Nordic nRF board by grimsteel

About the Tapt PCB

Tapt is an open source Nordic nRF PCB design by grimsteel, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 28.3 × 28.3 mm, with 28 components from 20 distinct parts.

Its main chip is the nRF52810-QCxx, from the Nordic nRF family. By type, the board carries 13 capacitors, 5 inductors, 4 resistors, 2 crystals, 1 IC and 1 antenna.

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

From the project

just a button

tapt is a BLE-powered IoT button. It uses an nRF52810 and can be powered for long periods of time on a single CR2032 battery.

It can be connected to Home Assistant and hooked up to automations from there.

1. The 5 pin debug header must be soldered on for flashing 2. The battery holder can be soldered onto the back 3. The WS2812B and the UART are optional. Both of these will cause more battery drain. 4. The PCB can be screwed into the base of the case. The button cap locks into the case.

Tapt, from the project README
From the project README

Main components on the Tapt

nRF52810-QCxx

Tapt bill of materials (BOM)

28 components, 20 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
nRF52810-QCxx
U1
1
32MHz
Y1
1
32.768kHz
Y2
1
Antenna_Chip
AE1
1
SW_SPST
SW2
1
LED
D2
2
3.9nH
L1, L5
1
10uH
L2
1
15nH
L3
1
2.7nH
L4
4
100nF
C1, C2, C6, C15
1
0.8pF
C3
1
1.0pF
C4
1
100pF
C8
1
1uF
C9
4
12pF
C11, C12, C13, C16
1
4.7uF
C14
1
1k
R3
1
100k
R4
2
1M
R5, R6

Tapt design files

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

Tapt: common questions

What microcontroller does the Tapt use?

The Tapt is built around the nRF52810-QCxx, from the Nordic nRF family.

How big is the Tapt PCB?

The Tapt measures 28.3 × 28.3 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Tapt?

28 components, from 20 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 Tapt design files?

From the grimsteel/tapt 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 Tapt design in my own project?

Yes, under the terms of its GPL-3.0 license, which grimsteel chose for the repository.

Can I test firmware for the Tapt 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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