Few people have heard of it, yet many consider John Blankenbaker's KENBAK-1 to be the first commercial personal computer.

Koss introduced these headphones over 40 years ago, and they remain affordable favorites to this day.

Steam Powered King Tiger Tank

Radio controlled steam tank

I loved building model kits when I was younger, but it never dawned on me how fun it would be to combine a Tamiya 1/16 kit of a WWII German King Tiger tank with a couple of miniature Regner Piccolo steam engines and a 3.5" marine boiler. This brilliant machine uses 100% steam propulsion, relying on batteries only for remote control and lighting.

The tank is controlled using a traditional 6-channel radio control unit, although the R/C receiver is a custom designed circuit board. All in all, this a brilliant machine. My only regret is that there aren't more of them. A nice little British Cromwell might prove to be an excellent adversary. 

Steam Turret Tank [instructables via Hack a Day]


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