Rfiddler - A SciFi-Gun that works in the real world
Destroys RFID-chips and some electronic devices (like usb-sticks) with a hacked 0.6KJ flashunit driving a 50 turn copper spool
Temporarily blinds (and annoys) humans with a second flashunit in front
4-Track MP3, 2 Watt built-in sound
32 LEDs, 3 AVR ATMega8, VLSI7000, 2 7segs
Power consumption 860mA
Mechanical components still working, you can load+fire the gun and the flash will engage (even with main cpu off, relay trips because of vibration)
Only 500 lines of c-code, total.
Video, zapping a id-card and a hotel key:
Information needed to build your own:RFID zapping idea based on an idea from chaos communication congress 2005.
The mp3-player is a hacked Hama SD CardReaderWriter with MP3 Player ordered from amazon for <3 Euros. Chip is a VLSI7000, you can control it via SPI.
The two 7seg display are directly soldered to a MegaAT8, similar to this approach.
Orange leds are charlieplexed to PORTB and PORTD, PORTC for the white leds. Uses software-PWM at ~500 Hz, Interrupt-driven (SIG_OVERFLOW0) via Timer0/prescale 1024.
Gun is a Nerf N-Strike Recon CS-6 a friend gave me (it was broken). Mine is unmodified and still works, last used in an office-war inculding 40 people.
Flash circuits salvaged from an old Canon Prima 2 Camera (analog, not needed anymore) and an old studio flash (with a gigantic 1KV/2800uF cap) i found via ebay.
Project cost: ~50€ total, including accupack, chips, leds, paint and primer.
I plan to add a (protected) RFID reader (that displays rF on the 7seg on a received packet) so you can instantly check that
your RFID died.