This article shows how to make a air gap high speed flash. With this flash you are able to capture a bullet in the air. The circuit uses a 35,000 volts capacitor. glacialwanderer.com writes: [via]
In my quest to capture amazing high speed photographs I notice that when photographing shooting bullets the bullets were blurred. I found that standard xenon tube, which standard flashes use, is very bright for the energy put into it because of glowing xenon gas. The book Electronic Flash Strobe by Harold Edgerton explains all the calculations, but in practice this means all the flashes from Nikon, Canon and others that use xenon flash tubes have a minimum duration of 1/40,000th of a second. That’s fast enough for most things, but not for a shooting bullet travels around 1000 feet/second. In 1/40,000th of a second that bullet can travel about 1/3rd of an inch leading to blurry photographs of bullets.
High Speed Air-gap Flash - [Link]
Tweet-a-Pot: Twitter Enabled Coffee Pot using an Arduino and power switch tail. [via]
Like the idea of making coffee on the fly? from your bed? While you’re on the bus coming home? Then the Tweet-a-pot is for you! Tweet-a-pot is the next in fancy twitter enabled devices. This coffee pot enables its owner to make a pot of coffee from anywhere they have cell phone reception, using twitter and an arduino board.
Tweet-a-Pot: Twitter Enabled Coffee Pot – [Link]
This project is a virtual bike riding program. Using a few simple electronic components and some software you too can ride in virtual style! A sensor from a bike computer is used to detect the rotation of a bike tire. The output of this sensor and the turning angle (controlled by the thumb joystick) is read by an Arduino and relayed to a computer over a usb cable. The computer reads the number of rotations and angle of the joystick and uses these values to control a virtual bike within google earth! [via]
Bike controller for Google Earth - [Link]
Markus got his hands on some old split-flap displays from a train station and build a controller for them. The controller is based on a PIC 12F683 and is using optocouplers to isolate the 42 volts display motors from the driver circuit. The unit is able to control 8 of the segments.
DIY Split-flap display driving circuit – [Link]
This project adds pan and tilt features to a webcam. It has IR control and uses a common television remote to instruct a servo motor. The device is based on Picaxe 08M microcontroller. Check details and schematic on the link below.
Cammy v.1.0 Living Room Webcam Tracking – [Link]
This project is a temperature controller that is able to control a fan according to temperature. It’s a simple design and uses simple components. Check schematic and PCB on the link below.
0C to 150C Temperature controller – [Link]
This project is a thrust-vectoring inverted pendulum and it is demonstrating of how one might control an unstable system. It consists of a propeller and motor mounted to a servo on the end of a pendulum. The servo allows the thrust to be angled or vectored in order to swing-up and balance the pendulum. Control is accomplished by a PC running LabVIEW, but in the electronics you’ll also find a pair of AVR microcontrollers for PWM signal generation.
The thrust-vectoring inverted pendulum - [Link]
This project is a temperature controller that controls the temperature of refrigerator and can regulate conditions for food and alcohol fermentations. It is based on ATmega48 microcontroller and includes a remote temperature sensor. It also has a relay to control the refrigerator. Check schematic and source code on the link below.
YATC – Yet Another Temperature Controller – [Link]