This coil launcher is based on a disposable camera flash system. It uses the charging system from one camera plus the the flash capacitors from four cameras. The coil is 200 turns in 10 layers wrapped around a glass tube with a 3mm inside diameter. The projectile is a 2.5mm diameter nail. It certainly isn’t as high powered as some of the systems we’ve featured, but firing at 20-25m/s it can still be dangerous.
[thanks phuzzy3d]
Timothy Wisdom’s D’Groove is a digital haptic force feedback turntable. D’Groove takes digital music control further than products like FinalScratch. The platter has four divisions marked on it; each line represents one beat in a measure. Every time the record makes a full rotation it plays a full measure. The force feedback allows you to actually feel where the beats are.
The Q-Slider represents where in the song you are. As the song progresses, the slider moves to match. If you grab the handle it’s like picking up the record needle. Sliding the handle you can feel the intensity of the track. There are a lot of other features and possibilities that I haven’t covered. Check out the video on the site to see it in action.
Automatic Position Reporting System (APRS) is used to transmit location and other real-time data over amateur radio frequencies. [Scott Miller]’s OpenTracker project is designed to encode the NMEA data from a serial GPS receiver for transmission. It doesn’t have to be used for GPS telemetry though, you could hook up a weather station or any other remotely located project. Scott has boards, parts and even full kits available.
The transform switch on a mixer is used to turn ON and OFF individual channels. The toggle switches used in the DJM-707 are three position switches, but their plastic caps limit them to only two positions. [Sp4rk] removed the switches from the unit, wired the other off position, and trimmed the cap. After this modification the switches have an OFF-ON-OFF motion. Here’s an MP3 of Sp4rk scratching with the new modification and a Coral cache of the transform modification.
Backlights are one of the most common failure points on LCD panels. Even though they usually say “no serviceable parts” on the back you might still be able to fix your monitor. Jared Bouck details the removal of the dead cold cathode and replacing it with a new tube and inverter. Not quite as dangerous as opening a CRT, but you still need to be careful with the mercury vapor filled tubes.
[thanks Tom]
[Aj] found this great article for building a really cheap microscope. The goal of the project is to construct a compound microscope that is superior to the cheap toy/children’s microscopes. Besides standard construction materials it uses the lenses from four disposable cameras. The article also covers a lot of possible improvements to the ‘scope: focus control, fine focus control, condensers, different eyepieces.
Jason wanted a simple underwater housing for his cheap X10 camera. He decided to add IR illumination and thrusters to move it around. Before he knew it he had a simple PVC remote operated vehicle on his hands. The lights and camera are housed in the upper PVC tubes. Six 12V bilge pumps are located below for directional control.
