2 layers43 × 57 mm
PiKwonDoHAT
Wright4TheJob/PiKwonDo
A Raspberry Pi-based system for scoring TaeKwonDo sparring matches.
42 parts2MIT
2 layers110 × 44.5 mm
A Raspberry Pi-based system for scoring TaeKwonDo sparring matches.
- Size
- 110 × 44.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 23
- Nets
- 16
- Pads
- 91
- Tracks, vias
- 172, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 18 Mar 2018
- Updated
- 20 Oct 2025
Overview
Timer is an open-source printed circuit board by Wright4TheJob, from the Wright4TheJob/PiKwonDo repository on GitHub, published under the MIT licence. It is a 2-layer board of 110 × 44.5 mm with 23 parts on 16 nets, routed with 172 tracks and 0 vias.
It is built around the 74HC165D, MIC5504-3.3YM5 and BAT54. Its parts include 5 capacitors, 5 resistors, 5 switches, 4 diodes and 2 ICs.
Main components
3
74HC165D
SO-16-40℃~+125℃ 1 28ns@6V,50pF 2V~6V 35MHz 500mW 74HC 8 Parallel or Serial to Serial SOIC-16 Shift Registers ROHSNexperiaShift Registers
MIC5504-3.3YM5
SOT-23-5-40℃~+125℃@(Tj) 1 120uVrms 15uA 180mV@(300mA) 3.3V 300mA 5.5V 75dB@(1kHz) Fixed Over Temperature Protection、Enable Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTECH PUBLICVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
BAT54
SOT-23200mA 2uA@25V 30V 800mV@100mA Independent SOT-23 Schottky Diodes ROHSFOSANSchottky Diodes
README
README.mdPiKwonDo
A Raspberry Pi-based system for scoring TaeKwonDo sparring matches.
Goals
The goal of this project is to create an inexpensive system for scoring TaeKwonDo sparring. This system is intended to be small and easily modified to suit the needs of individual Dojangs. The system is currently designed for electronic scoring manually triggered by corner judges.
Phase 1 of the judging system will use judge triggers connected by wires to the central controller. Phase 2 is intended to use wireless judge trigger systems or mobile phone connectivity.
While the system is designed to mimic expensive World TaeKwonDo-approved systems, it is not certified for official tournament use.
Status
Bill of Materials:
The project is under alpha development. Software has been developed but has yet to be tested with the hardware. Electronics are designed for single-sided PCB routing and have all completed initial design but have not been tested yet. Cases are designed for 3D printing. Hardware and software folders have individual README files with more particular statuses and todo items.
All design files and software are provided "as-is." Any stable releases will be bundled for easy download, but this does not guarantee suitability for your particular setup.
Software
The judging software and UI is written in python and QT. A dedicated thread scans the status of judge controller buttons. Game logic and UI are run as the primary thread.
Electronics
Controllers use shift registers to store and sequentially read out the values of the buttons in each controller. Judge controllers have 10 buttons and the timer controller has 5. PCBs are designed for single-side milling, with traces no smaller than 0.4mm and trace gaps of 0.3mm. Through-hole components are used for hand soldering and occasional jumper wires are used.
Hardware
The system is designed and tested on a Raspberry Pi 3B+. Physical wiring uses phone jacks and standard 4-conductor phone cables for data communication to judging triggers. Cases are designed for 3D printing and modeled in Solidworks.
Parts
23| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | DPDT-Button | PiKwonDo:Switch-DPDT | S1, S2, S3, S4, S5 |
| 3 | 470 | Resistors_SMD:R_1206_HandSoldering | R2, R3, R4 |
| 3 | 470pF | Capacitor_SMD:C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C3, C4, C5 |
| 2 | 1uF | Capacitor_SMD:C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C1, C2 |
| 1 | 10 | Resistors_SMD:R_1206_HandSoldering | R5 |
| 1 | 100 | Resistors_SMD:R_1206_HandSoldering | R1 |
| 1 | 3.3V | Diode_SMD:D_SOD-123 | D4 |
| 1 | 5V | Diodes_SMD:D_SOD-323_HandSoldering | D3 |
| 1 | 5x 47k | Resistors_THT:R_Array_SIP6 | RN1 |
| 1 | 74HC165 | Housings_DIP:DIP-16_W7.62mm | U2 |
| 1 | BAT54 | Diode_SMD:D_SMA_Handsoldering | D1 |
| 1 | LED | Diodes_THT:D_5W_P10.16mm_Horizontal | D2 |
| 1 | MIC5504-3.3YM5 | TO_SOT_Packages_SMD:SOT-23-5 | U1 |
| 1 | RJ10 | Timer:RJ14 | J1 |
Questions
How big is the Timer PCB?
It measures 110 × 44.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Timer use?
23 parts, built around the 74HC165D, MIC5504-3.3YM5 and BAT54. 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 Timer KiCad files?
From the Wright4TheJob/PiKwonDo repository on GitHub, at the commit this page was made from: the board is Electronics/Timer/Timer.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Timer design in my own project?
Its repository publishes it under the MIT 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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