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.

Single Tube Nixie Clock

Compact Nixie clock

Trax designed a rather appealing little Nixie clock around a single IN-8 tube. He writes: "This clock is more an ornament than a useful machine because it consists of just one digit (tube) so it displays current time every minute for three times. It is built inside of an old wooden box and it's powered from a 7V DC wall adapter. Under a nixie tube there is a very bright green LED which makes everything look more beautiful. When time is not displayed, this LED blinks with 1 second period (seconds counter). To power-up a nixie, some 170V DC is required, which means that there is a step-up converter on board with MC34063A IC."

There's even a 3V lithium backup battery inside the case to keep the clock running if it's unplugged from the mains. Source code is available if you'd like to build your own.

IN-8 Single Nixie Tube Clock [via Hacked Gadgets]

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