Using a screwdriver to start your car

screwdriver-key

[Hahabird] uses this screwdriver to start his car. Despite what it may look like, only this particular screwdriver will start the ignition because it still uses the key lock. What he’s done is alter the screwdriver to act as an extension for the key. It’s purely aesthetic, but you have to admit it looks pretty gnarly hanging off of the steering column.

The hack merely involved cutting off the unneeded parts of the key and screwdriver. With the shaft of the tool cut down to size he clamped it in a vice and cut a slot into it using a hack saw. From there he headed over to the grinding wheel and smoothed out the sharp edges.

The key itself had the handle portion cut off and was thinned on the grinding wheel to fit snugly in the screwdriver slot. To permanently mate the two pieces he used a torch and some silver solder.

[via Reddit]

High voltage Thor’s Hammer: Mjolnir at 80,000 volts

[Thor's] hammer, Mjolnir, is pretty freaking awesome. It can only be picked up by [Thor], he can use it to fly, and probably the coolest part, it can summon lightning. After watching the first movie, and goofing around with the guys at ArcAttack, I had this idea that I could stuff a tiny tesla coil into a mjolnir and end up with a really cool prop.

At this point, I had to make a decision. I was either going to go portable and live with small arcs, or make this a stationary piece and hide a giant tesla coil in a base. It would have bigger arcs, but I couldn’t carry it around.  While I may re-visit the stationary version at some point, I ultimately decided I wanted to be able to wander around and play with this thing.

I had seen some videos of [Staci Elaan] showing off her battery-powered coils and I really liked her results. I figured, with her experience, she could probably do a better job than I could on getting the most bang out of a small package.  She was happy to be involved and delivered a small 12v powered coil for me to work with. I should also point out that the coils [Staci] makes are usually donated to educational groups. This woman is awesome.

[Read more...]

AM tube radio restored and given MP3 playback too

mp3-antique-radio

This AM radio looks a bit like it did coming out of the factory. But there are a lot of changes under the hood and that faceplate is a completely new addition. The project really is a restoration with some augmentation and [Michael Ross] did a great job of documenting the project.

The Kenyon radio was built in 1946 and uses vacuum tubes for the amplifier. Considering its age this was in relatively good shape and the first thing that [Michael] set out to do was to get the electronics working again. It involved replacing the messy collection of capacitors inside. He then cleaned up the tubes, checking for any problems, and put the electronics back together to find they work great!

He cleaned up the chassis and gave it a new coat of finish. The original dial plate was missing so he built a wood frame to match a dial scale he ordered. The bell-shaped brass cover hides the light that illuminates the dial.

He could have stopped there but how much do people really listen to AM radio these days? To make sure he would actually use the thing he added an Arduino with an MP3 shield. It patches into the antenna port via a relay, injecting modern tunes into the old amplifier circuit. Catch a glimpse of the final project in the video after the break.

[Read more...]

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