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4 layers18.1 × 39 mmTikk hw, the printed circuit board in 3D

sensor/io front panel for low cost keyboard bluetooth breakout

Size
18.1 × 39 mm
Copper layers
4
Thickness
1.6 mm
Parts
155
Nets
56
Pads
390
Tracks, vias
1,489, 235
Pours
11
Routed
Yes
KiCad
KiCad 9.0 (file 20241229)
Created
8 Jul 2025
Updated
21 Aug 2025

Overview

Tikk hw is an open-source printed circuit board by golioth, from the golioth/tikk-hw repository on GitHub, published under the CERN-OHL-P-2.0 licence. It is a 4-layer board of 18.1 × 39 mm with 155 parts on 56 nets, routed with 1,489 tracks and 235 vias.

It is built around the IS31FL3731-QFLS2-TR, TMP102AIDRLR(UMW) and F.0402.00003/P2-0402R1TS2-045T-001, with the CC0402KRX7R7BB104, CL31A107MQHNNNE and CC0603JRNPO8BN561 among its other parts. Its parts include 14 capacitors, 7 resistors, 6 ICs, 2 connectors and 2 switches. It belongs with the radio and wireless and sensors and measurement boards and the nRF52 and nRF5x boards of this library.

Main components

11

README

README.md

Tikk Bluetooth Sensor / Output Board

We created the Tikk board as an affordable* board ($15 in low volume) for displaying the capabilities of Golioth's Bluetooth Connectivity. It plugs into a low cost ($3) Tenstar Robot nRF52840 breakout board, targeted at Keybord makers. We will have many of these nodes surrounding a Golioth gateway to showcase all of the uplink and downlink functions available to users. The focus was on easily demonstrated functions, such as LEDs and motor drivings for outputs and various in-tree Zephyr supported sensors for inputs.

Rev A Preview Image

image image

Rev A Photos

Tikk-RevA-Back

Tikk-RevA-Front

Features

This board has the following characteristics when soldered to something like the Tenstar Promicro

  • 105 LEDs in 0402 format, individually addressable in a 7x15 matrix with the IS31FL3731
  • Two H-Bridge chips (L9110S) for driving a single stepper or two dc motors
  • 3 axis accelerometer (LIS2DH12)
  • Temperature sensor (TMP102)
  • QWIIC / Stemma header to expand breakout boards*
  • User button
  • Reset button
  • A voltage divider that monitors battery voltage

Additional capabilities added by the Tenstar ProMicro and nRF52840

  • Additional GPIOs I can solder to (5 digital, one analog)
  • LiPo battery charger on board
  • Load switch for all peripherals except motor driver
  • USB Input to the nRF52840 (get serial terminal using USB-CDC)
  • NFC tag emulation (via the nRF52840 and onboard flex connector)

Parts

155
QtyValueFootprintReferences
105F.0402.00003/P2-0402R1TS2-045T-001easyeda2kicad:LED0402-RDLEDC1-R1, LEDC1-R2, LEDC1-R3, LEDC1-R4, LEDC1-R5, LEDC1-R6, LEDC1-R7, LEDC1-R8, LEDC1-R9, LEDC1-R10, LEDC1-R11, LEDC1-R12, LEDC1-R13, LEDC1-R14, LEDC1-R15, LEDC2-R1 +89
6CC0402KRX7R7BB104easyeda2kicad:C0402C3, C8, C9, C10, C11, C12
6FiducialFiducial:Fiducial_0.5mm_Mask1mmFID1, FID2, FID3, FID4, FID5, FID6
4CL31A107MQHNNNEeasyeda2kicad:C1206C4, C5, C6, C7
3RC0402FR-0720KLeasyeda2kicad:R0402R3, R4, R5
2CC0603JRNPO8BN561easyeda2kicad:C0603C13, C14
2L9110S_C5157607easyeda2kicad:SOP-8_L4.9-W3.9-P1.27-LS6.0-BLU4, U7
2MountingHoleMountingHole:MountingHole_2.1mmH1, H2
2RC0402FR-07100KLResistor_SMD:R_0402_1005MetricR1, R2
2TS24CAeasyeda2kicad:SW-SMD_TS24CASW1, SW2
151281-0598easyeda2kicad:512810598J1
1AUDIO-INTestPoint:TestPoint_Pad_D1.0mmTP8
1CB9TestPoint:TestPoint_Pad_D1.0mmTP9
1CL10B224KA8NNNCeasyeda2kicad:C0603C1
1CL21A106KAYNNNEeasyeda2kicad:C0805C2
1IS31FL3731-QFLS2-TReasyeda2kicad:QFN-28_L4.0-W4.0-P0.40-BL-EPU1
1Jumper_3_Bridged12Jumper:SolderJumper-3_P1.3mm_Bridged12_Pad1.0x1.5mm_NumberLabelsJP1
1LIS2DH12TReasyeda2kicad:LGA-12_L2.0-W2.0-P0.50-BLU2
1NC1TestPoint:TestPoint_Pad_1.0x1.0mmTP1
1NC2TestPoint:TestPoint_Pad_1.0x1.0mmTP3
1NC3TestPoint:TestPoint_Pad_1.0x1.0mmTP4
1NFC1TestPoint:TestPoint_Pad_1.0x1.0mmTP2
1NFC2TestPoint:TestPoint_Pad_1.0x1.0mmTP5
1PZ254R-11-04Peasyeda2kicad:HDR-TH_4P-P2.54-H-M-W10.4H3
1RC0402FR-070RLeasyeda2kicad:R0402R7
1RC0402FR-07100KLeasyeda2kicad:R0402R6
1SWCLKTestPoint:TestPoint_THTPad_1.0x1.0mm_Drill0.5mmTP6
1SWDIOTestPoint:TestPoint_THTPad_1.0x1.0mm_Drill0.5mmTP7
1TMP102AIDRLReasyeda2kicad:SOT-563_L1.6-W1.2-P0.50-LS1.6-BRU5
1Tenstar nRF52840nrfmicro:pro_microU3
1ZX-SH1.0-4PWTeasyeda2kicad:CONN-SMD_4P-P1.00_MEGASTAR_ZX-SH1.0-4PWTP6

Questions

How big is the Tikk hw PCB?

It measures 18.1 × 39 mm and has 4 copper layers, 1.6 mm thick.

What parts does the Tikk hw use?

155 parts, built around the IS31FL3731-QFLS2-TR, TMP102AIDRLR(UMW), F.0402.00003/P2-0402R1TS2-045T-001 and CC0402KRX7R7BB104. 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 Tikk hw KiCad files?

From the golioth/tikk-hw repository on GitHub, at the commit this page was made from: the board is tikk-hw.kicad_pcb and its schematic tikk-hw.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Tikk hw design in my own project?

Its repository publishes it under the CERN-OHL-P-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

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