Electronic conference badges are a thing. I like to hack them into weird delicate blinky sculptures.
supercon monster matrix (2016)
The 2016 Hackaday Supercon badge had an 8x16 red LED matrix. I felt it was too small, so I used a few chunks of FR4 and a bunch of magnet wire to embiggen it. Won Best Dead Bug in the badge hacking contest. More documentation here, article here.
tindie binary counter eyes (2017)
The Tindie Badge is a simple learn-to-solder project, where the user solders a pair of insertion mount T1-3/4 color-changing LEDs to the front and a battery/switch to the back. I swapped the LEDs for a pair of 5-element midair loops:
... and added a QFN ATTiny84A to the back, along with a few support components:
Jolly Wrencher + Teensy (2018)
Like the Tindie badge, the Jolly Wrencher originally was a learn-to-solder project with a few blinky LED eyes. I added all the parts of a Teensy 3.2 (ARM Cortex M4 microcontroller, bootloader, bypassing, oscillator, etc), along with a MEMS microphone, analog amplifier, power supply, and ten LEDs. The badge used the ARM CMSIS DSP FFT capabilities to display a real-time audio spectrum from the microphone (LEDs in test mode below).
That is, until something broke. Some things are too delicate to survive. More documentation here.
Dead-Bug Linux computer (2018)
Based on the Octavo OSD335x SiP running BeagleBone firmware. The chip enumerated over USB but I never got it to boot, but to be fair it was a busy weekend and SD cards can be fussy.
© copyright zach fredin, 2016-2018