Voja Antonic
Hackaday names Voja Antonic as the badge designer for the down-to-the-metal computer trainer lineage used at Berlin.
SourceHackaday Berlin 2023 · Germany · 2023
Hackaday Berlin 2023 Voja4 Badge
Berlin-reskinned down-to-the-metal computer trainer
Hackaday Berlin 2023 gave European attendees a Berlin-reskinned Voja Antonic Voja4 badge: a compatible revision of the 2022 Supercon down-to-the-metal computer trainer and retrocomputer, with public event sources tying it to the March 25-26 MotionLab.Berlin gathering and Saturday badge-hacking ceremony.
EventHackaday Berlin 2023
SeriesHackaday Europe
LocationMotionLab.Berlin
CountryGermany
Image Provenance
- Asset
- optimized WebP from Wikimedia Commons photo
- Status
- licensed original photo
- Source
- Hackaday Berlin 2023 electronic badge Voja4
- License
- Creative Commons Attribution-Share Alike 2.0 Generic
- Attribution
- Mitch Altman, Wikimedia Commons / Flickr maltman23
- Notes
- Original 4032x3024 Wikimedia Commons documentary photo downloaded through Special:Redirect/file for File:Berlin, Mar-2023 (52930401548).jpg and preserved in Public/images/source; the public badge asset is an optimized WebP derivative. Commons records FlickrreviewR 2 confirmation on 7 June 2024 that the Flickr source was licensed cc-by-sa-2.0; this is a real conference photo of the physical Hackaday Berlin 2023 Voja4 badge, not generated content or placeholder art. The published badge.gallery delivery file is an optimized WebP generated from the rights-cleared local derivative/source with metadata stripped, WebP quality 82, and a maximum side cap of 1600 pixels when the source is larger; upstream source URL, license, and attribution remain unchanged.
People
Authors & Credits
Mitch Altman
Wikimedia Commons and the Flickr source identify Mitch Altman as the author of the CC BY-SA 2.0 Hackaday Berlin 2023 badge photo.
SourceHackaday
Hackaday published the event page and official Berlin badge preview used as primary evidence.
SourceWhy It Mattered
The record fills the missing first Berlin Hackaday hardware-conference badge year and keeps the lineage explicit: the artifact is a real Hackaday Berlin conference badge, but its technical identity descends from Voja Antonic's Supercon Voja4 design rather than an unrelated Germany-only badge.
Hardware
Hackaday describes the Berlin unit as a re-skinned and hardware-tweaked badge that stayed compatible with the 2022 Supercon badge. The v0j4 architecture notes document a 4-bit datapath, 12-bit instruction words and addresses, 4096-word instruction memory, 256 nibbles of data memory, 16 registers, input/output GPIO bits, a 16x8 LED raster display, serial access, an SAO port, and a PIC24 implementation of the v0j4 virtual machine.
Software & Apps
The public v0j4 notes describe a low-level, machine-code-oriented instruction set with compact opcodes, register-mapped state, GPIO access, stack behavior, and stored program slots. The Berlin record does not claim a separate final firmware archive beyond the public v0j4 and Hackaday source trail.
Lore
The official Hackaday Berlin preview framed the badge as a second chance for European attendees who missed Supercon, pointed to earlier hardware and software hacks including a punchcard reader and demo pull requests, and announced a Saturday-night badge-hacking ceremony for attendees to show their builds.
Lifecycle
Add-ons & Upgrades
event challenge
historical
Badge-hacking ceremony
Hackaday announced a Saturday-night badge-hacking ceremony for attendees to show what they made with the Berlin Voja4 badge.
Source
hardware expansion
source-backed
SAO and external IO surface
The architecture notes list four output bits, four input bits, an external connector, serial mention, and an SAO port as the public expansion surface.
Source
virtual CPU
source-backed
v0j4 machine-code trainer
The v0j4 project describes the badge as a PIC24 implementation of a 4-bit virtual machine with small instructions, visible registers and stack state, GPIO, and program slots.
SourceOperational history
Issues & Camp Impact
firmware archive boundary
note
The recovered public sources describe the architecture and lineage, but this pass did not recover a Berlin-specific final firmware, schematic, BOM, or Gerber archive.
Software and hardware claims stay limited to Hackaday's compatibility statement, the v0j4 architecture notes, and the original Supercon badge context.
- Confidence
- current public source trail
- Status
- needs deeper archive recovery
- Timeframe
- current catalogue build
- Source note
- Hackaday Berlin preview, v0j4 details, and 2022 Supercon badge article.
lineage and revision caveat
note
Hackaday says the Berlin badge was re-skinned and included a couple hardware tweaks, but stayed 100% compatible with the 2022 Supercon badge.
The catalogue records the Berlin artifact as an event-specific revision while avoiding unsupported claims about exact PCB changes until a Berlin-specific hardware archive is recovered.
- Confidence
- official article plus project notes
- Status
- documented
- Timeframe
- Hackaday Berlin 2023
- Source note
- Hackaday Berlin badge preview and v0j4 project notes.
photo description typo
note
The Commons/Flickr photo description contains the typo 'macjine code'; badge.gallery records the machine-code behavior in normalized wording while preserving the source title and provenance.
The image is still usable because the license, attribution, Flickr source, and review status are explicit; the typo is not treated as technical evidence beyond the intended machine-code description.
- Confidence
- image source metadata
- Status
- documented
- Timeframe
- Wikimedia Commons transfer
- Source note
- Wikimedia Commons File:Berlin, Mar-2023 (52930401548).jpg.
Resources
2022 Supercon Voja4 article
lineage article · Hackaday article establishing the original Supercon Voja4/retrocomputer badge context that the Berlin badge reused and re-skinned.
Hackaday Berlin 2023 Voja4 photo
licensed image source · Wikimedia Commons source page for Mitch Altman's original documentary photo, including CC BY-SA 2.0 license, FlickrreviewR confirmation, attribution, and file metadata.
Hackaday Berlin 2023 event page
official event page · Official Hackaday.io event page for Berlin, Germany, March 25-26, 2023, at MotionLab.Berlin.
Hackaday Berlin badge preview
official article · Hackaday preview announcing the Berlin badge as a re-skinned, hardware-tweaked, Supercon-compatible Voja Antonic computer trainer and scheduling the badge-hacking ceremony.
v0j4 architecture notes
project details · Hackaday.io v0j4 notes describing the 4-bit architecture, instruction and memory model, LED raster display, GPIO, serial path, SAO port, and PIC24 implementation.
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Sources
Hackaday: Hackaday Berlin: The Badge, Workshops, And Lightning Talks
Retrieved 2026-05-15 · Primary Hackaday source for the Berlin-reskinned Voja Antonic badge, Supercon compatibility, hardware-tweak caveat, pre-event hacking pointers, and Saturday-night badge-hacking ceremony.
Hackaday: The 2022 Supercon Badge Is A Handheld Trip Through Computing History
Retrieved 2026-05-15 · Lineage source for the original down-to-the-metal retrocomputer badge framing and planned Gerber, emulator, and PIC code release context.
Hackaday.io: Hackaday Berlin 2023
Retrieved 2026-05-15 · Primary event source for Berlin, Germany, March 25-26, 2023, MotionLab.Berlin, and event identity.
Hackaday.io: v0j4 Project Details
Retrieved 2026-05-15 · Project source for 4-bit datapath, 12-bit instruction words and addresses, memory layout, registers, GPIO, 16x8 LED raster screen, serial mention, SAO port, and PIC24 implementation.
Wikimedia Commons: File:Berlin, Mar-2023 (52930401548).jpg
Retrieved 2026-05-15 · Image-provenance source for the original Mitch Altman conference photo, badge identification, CC BY-SA 2.0 license, Flickr source, and FlickreviewR confirmation.