We’ve all seen these on the side of the road and wondered how we could change the message. It turns out that it is actually pretty easy. There’s a keypad inside for programming that is often still set with a default password of “DOTS”. Even if the password has been changed, you can reset it right there pretty quickly. We shouldn’t even need to warn you that it is illegal to tamper with these, so unless there really are zombies ahead, you probably shouldn’t mess with it.
A leyden jar is basically just a simple home made capacitor. We’ve shown you how to make them before. This, however, is how you make a ridiculously large one. [Nickademuss] used a five gallon bucket to make his leyden jar. That’s five whole gallons of lightning. The video, which you can see after the break, shows it light up the entire room when it lets out a fairly formidable spark. This is dangerous folks, be careful.
Continue reading “Leyden jar of DOOM.”
[Steve] was discussing airsoft with a friend when he came up with this idea. His friend was lamenting the lack of “action” style targets for their airsoft hobby. [Steve] took this as an opportunity to make his own automated target system. The targets themselves are made from Construx, a paper target and a piece of cloth to stop the airsoft pellets. Controlled by an Arduino and an ioBridge module, it has a web interface so he can switch programs from up range. You can see a video example of him shooting some targets after the break. Next,he should make it twitter where each target was hit.
Continue reading “Automated shooting range”
For those who use these little cartridges, you know how quickly the price can add up. [steve] takes us through the process of adding a valve to a spent cartridge so it can be refilled. Over all, it doesn’t seem too difficult, and [steve] offers lots of tips to increase longevity and reliability. It isn’t very often that we show a hack here that doesn’t involve some kind of electronics, so take a break from the resistors and microprocessors for a moment and enjoy.
In [Bre Pettis]’s latest “things” video, he talks with [Adam Mayer] about his geared business cards. [Adam] has designed several versions of these cards that have functional gear systems in them. There appears to be a simple two gear one and a more complicated planetary gear set up. The designs have been uploaded to Thingiverse, so you can download and build your own.
We pretty much don’t know anything about this POV device other than it uses 96 LEDs. We’ve seen POVs with more LEDs, but usually they aren’t packed in so tight. This thing looks almost capable of displaying low res movies. Wouldn’t this thing be cool, and probably dangerous, in a hat?
[via Hacked Gadgets]
WEEE Man is an art display that has been roving around England. No, he doesn’t walk or talk. He is here to remind us of how wasteful we can be. Hackers rejoice, we’re part of the solution. It also doesn’t hurt that he is Seven Meters tall and over three tons. WEEE Man looks awesome, but are we the only ones that spotted stuff and thought “ooh, I could have used that for a cool project.”?
[via The Presurfer]