Add-on dossier
A linkable lifecycle record for hardware expansions, app ecosystems, firmware upgrades, cases, radio parts, and post-event badge experiments.
The ATmega88 was already flashed with a USB bootloader so attendees could program it over a normal USB port with avr-gcc, avrdude, and the public SVN checkout.
Badge context
Simon Schoar's project index identifies eHaserl as the Easterhegg 2010 conference badge.
muCCC badge-history note placing eHaserl before r0ket and later camp badges.
Assembly, flashing, errata, alternative software, and parts notes for the eHaserl badge.
Schematic link from the official badge assembly page.
SVN checkout path used by the wiki's flashing example.
media.ccc.de talk described as the surprise talk for the Easterhegg surprise badge.
Source trail
Primary source for assembly order, ATmega88, USB bootloader, flashing command flow, alternative software, errata, and safety notes.
Project source identifying eHaserl as the Easterhegg 2010 conference badge organized by the Munich CCC.
Talk source for the surprise-badge framing and eHaserl lore.
Current muCCC history note tying eHaserl into the club's camp-badge lineage.
Software source checkout path documented by the EH2010 badge wiki.