2 layers28.8 × 14 mm
Pcb s16
serisman/pdk-digital-clock
A 4-digit 7-segment digital clock, based on the inexpensive Padauk microcontrollers
12 parts14GPL-3.0
2 layers106 × 65 mm
39C3badge
hackwinkel/39C3LEDbadge3hardware design files and firmware for an electronic name tag created for 39C3
- Size
- 106 × 65 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 58
- Nets
- 25
- Pads
- 135
- Tracks, vias
- 344, 68
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 5 Jan 2026
- Updated
- 5 Jan 2026
Overview
39C3badge is an open-source printed circuit board by hackwinkel, from the hackwinkel/39C3LEDbadge repository on GitHub, published under the MIT licence. It is a 2-layer board of 106 × 65 mm with 58 parts on 25 nets, routed with 344 tracks and 68 vias.
It is built around the PFS154-S16. Its parts include 43 diodes, 9 resistors, 2 ICs, 2 connectors and 1 capacitor.
Main components
1README
README.md39C3LEDbadge
The 39C3 LED badge is a cheap electronic name-badge with a PADAUK PFS154-S16 microcontroller, 42 LEDs and IR transmitter & receiver for inter-badge communications. It is compatible with other "friends"-badges you can find in this github account.
When alone, the badge (using standard firmware) randomly flashes its LEDs, when there are friends in the neighborhood, it shows a pattern of chasers.
This repository consists of 7 parts:
- This file - README.md
- 39C3LEDbadge-hardware - the schenatic and PCB design files
- 39C3LEDbadge-alternative-hardware - the same schematic but with a different PCB design
- 39C3LEDbadge-software - the software to go with both hardwares
- 39C3LEDbadge-workshop - (unfinished) workshop instructions
- 39C3LEDbadge.pdf - the schematic diagram in pdf format for easy reference
- LICENSE - a file containing the (MIT) license under which these materials are distributed
The software directory contains instructions for building the firmware using FOSS tools. You will, however need to have a suitable programmer.
The software/hardware may also work with a PMS150C-S16 and pin compatible controllers from other manufacturers (e.g. Nyquest tech), but this is untested
Background
Predecessors of this badge were originally designed for SMD hotplate soldering workshops at TBD (https://tbd.camp/) and later used for workshops at camps (Haxogreen. Bornhack, Eth0), various hackerspaces and private workshops. The designs and software for the other badges can be found elsewhere in my github account ( https://github.com/hackwinkel/ )
According to internet rule 663829, "Every hacker conference shall have a badge". Being hackers, of course, this leads to hypotheses 1-3:
- Any hacker conference badge will be overly complex,
- Any hacker conference badge will be released with unfinished software, and
- Any hacker conference badge will function poorly for its namesake purpose.
This badge disproves these 3 hypotheses.
Parts
58| Qty | Value | Footprint | References |
|---|---|---|---|
| 42 | LED_Small | 39C3:D_0805 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +26 |
| 7 | 100 | 39C3:R_0805 | R1, R2, R3, R4, R5, R6, R7 |
| 1 | 100n | 39C3:C_0805 | C1 |
| 1 | 1k | 39C3:R_0805 | R12 |
| 1 | 27 | 39C3:R_1206 | R13 |
| 1 | Conn_01x02_Male | 39C3:battcon | J2 |
| 1 | Conn_01x05_Male | 39C3:progpads | J1 |
| 1 | LED | 39C3:LED_3030 | D43 |
| 1 | Q_NMOS_GSD | 39C3:SOT-23 | Q1 |
| 1 | TSDP341xx | 39C3:IR_receiver | U2 |
| 1 | pfs154-s16 | 39C3:SOP-16 | U1 |
Questions
How big is the 39C3badge PCB?
It measures 106 × 65 mm and has 2 copper layers, 1.6 mm thick.
What parts does the 39C3badge use?
58 parts, built around the PFS154-S16. 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 39C3badge KiCad files?
From the hackwinkel/39C3LEDbadge repository on GitHub, at the commit this page was made from: the board is 39C3LEDbadge-hardware/39C3badge.kicad_pcb and its schematic 39C3LEDbadge-alternative-hardware/39C3badge.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the 39C3badge 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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