I'll be posting build logs of my more complete projects here.
HDD Self-Destruction: Attempt 3
My most recent self-destruct rig.
I wanted to use the rest of my thermite for this one (it was starting to get pretty oxidized) so I cut my limited-collateral-damage requirement and went all out with a thermite volume about 20 times greater than my initial attempt.
Linear Pilot Valve Air Cannon
My first [successfull] attempt at building a custom pilot valve. Similar to my first "compact" air cannon, the LAW I but 6" shorter and 30% lighter courtesty of the internal valve.
Air Cannon Booby Trap
A trip wire triggered air cannon I built when I was a lot younger. (I just found it in my basement)
Elegant? No. Cool? YES.
Infrared Triggered Airsoft Claymore
I spent a summer building this before I headed off to college.
It's a motion sensing mine that shoots a blast of airsoft bbs at it's target.