[Jared] sent us a feature he posted involving time-lapse photography and an LED. Using a custom built aparatus an LED is moved on two axis’ during a long exposure of around thirty seconds. The frame is wood and PVC with two gearhead motors powered by AA batteries to provide the locomotion. The LED is powered by a 3v button cell and automatically transitions through different colors.
[youtube=http://www.youtube.com/watch?v=XK9en2H7rBA]
We’ve brought you an HDD clock in the past, but [mb1988] tried to bring his project to another level by fully documenting it (in Polish). Inspired by [dzgdzzh]’s version of the same invention, [mb1988] decided to reverse engineer it (as well as make a few changes) and base it on the powerful ATmega128. Since this clock, along with most HDD clocks, can only display solid lines of radii, it cannot be used to display text. However, color schemes and animations can be toggled using a remote control. The housing itself is also pretty impressive. The back part of the enclosure was molded out of Rayobond, while the front was simply the original HDD case but spray-painted black and etched with some original artwork. The source code, schematics, and PCB layouts are freely available to download on the project’s thread, but you will have to login to the forum to access them.
We’ve seen bright bike lamps before. This one caught our eye because it needs a heat sink while in operation. [700lumenLED] built a super bright light for his bike that features an aluminum enclosure and heat sinks to protect the LEDs against overheating. Some nice work was done incorporating the 12v battery into a bike bottle with the power switch and a dimming potentiometer attached to the bottle cap.
There are so many apps available for the iPhone, one might even say there are a plethora. We would like to take a moment to help you find a few that might help with your hacking projects. Ever have problems remember a formula when you need it? Need to track the acceleration of your brand new rover? How about beginners needing help remember resistor codes. Well, there’s an app for that. Check out our suggestions after the break.
Continue reading “Top 10 IPhone Apps For Electronics Hackers”
[woody1189] put together some automatic lighting for his closet. Nine LEDs are grouped into three lamps and controlled by a hall effect sensor. He prototyped this on an Arduino and then migrated over to an ATtiny85. Although the current implementation could be accomplished without a microcontroller, we’d love to see some firmware improvements such as an auto shutoff for when you forget to close the closet door. The hall effect sensor seems to pop up in a lot of projects so make sure you get a few of them with your next parts order. Video of this in action after the break.
For some, a peggy 2.0 is pretty cool, but simply not impressive enough. [MonsieurBon] felt this way and simply built a larger LED rig for his peggy2.0. It still uses the brains of the peggy, but the LED array is a custom built cabinet, using ping pong balls as diffusers. Another interesting modification is that they added a midi port to the setup to generate music based on what LEDs are lit. They say it creates some nice background generative music during the game of life. You can see a video of the system in action after the break.
It looks like they weren’t the only ones with this idea. The u:moon project is very similar, meant to be hung from a balloon. There seems to be an issue with the gallery on his page though, so you might want to go to his picasa gallery.
[Matt] wanted to increase the intensity of the center brake light on his car. The factory installed light uses a 20w incandescent bulb and although aftermarket LED replacements are available, he decided to take the retrofit on himself. Using the Fresnel lens from the light assembly as protoboard, he mounted a row of 10mm LEDs along with their current limiting resistors. He then broke the glass from the original bulb, removed the filament, and soldered directly to the two electrodes. This way the bulb socket can still be used to connect to the car’s electrical system.
