Our friend Daniel Eindhoven from Megavolts has been hard at work improving on the coil gun that we featured here before. The new circuit modifications allows the gun to fire every second now. The new halogen charge resistors look much cooler also. “At the moment the only limiting factor for fire rate is the charge time, this is the time the capacitor bank takes to get fully charged. This time
We have seen some some strange batteries before, the potato battery comes to mind. When I think of beer, electrolyte isn’t the first thing I think of but the picture above is a beer battery. Watch the video below to see the battery lighting an LED. Now it just needs to be scaled up a bit to charge an iPod. Via HG Forum “The core of this device is the
If you like steampunk you are going to love this. This Steampunk Wheelchair Project is a work of art, other than the obvious donor electric wheel chair platform at the bottom the unit looks like it is something crazy from the past. The sound effects really top it off. Via Adafruit and Make “What you get when you mix an 1875 Eastlake Victorian platform rocking chair with a Permobil C300
If you are looking for a nice DIY Binary Clock design have a look at this one by Kenneth Finnegan. It uses a sweet DS3232 RTC, but at a cost of $7.63 it better also do the dishes… “The time is kept by a DS3232, which is a very cool chip in that it has a built in temperature sensor, which it uses to compensate the crystal to try and
Tangible Interaction and Macetech (makers of the Shift Bright) were part of the Olympics! They had a hand in quite a few LED installations but the coolest are these Olympic Interactive LED Globes. Macetech talks about the hurdles they had designing and building these devices, due to time constrains and part shortages they had to make some quick decisions in order to meet the deadline. “The globes are about six
Svofski sent in a neat hard drive clock design he calls Strobeshnik. The clock looks wonderful and he has documented the entire build including how he etched through the aluminum hard drive platters to make the number cutouts. There is a full schematic and code for the microcontroller provided. “Strobeshnik uses stroboscopic effect to create the illusion of persistent numeric display. The hard drive platter has 10 digits, colon and
BlackCow from Homebrew Tech has a curious cat who likes to open the front door if it wasn’t properly latched. This Time Delay Door Alarm Project solves that problem by monitoring the door and producing a tone if it has been left open for more than around 30 seconds. This way it isn’t buzzing every time you use the door normally. The schematic is available on his site if you
