If you decide to learn microcontrollers you always need a real board to test programs in reality. Using development boards rather than simulators is more exciting as you can see really working results…or not:). Tahan Prahara have developed simple cheap AT89Sxx development board that every beginner can build for learning assembly or C language programming.
AT89Sxx Cheap and Simple Learning Board - [Link]
This is a ScreenKey – a programmable button that can display any graphic with a backlight that is itself configurable to be a handful of different colors. We have both RGB and RG versions. So cool !
ScreenKey - [Link]
I ordered a MiniPOV3 kit from the Makezine Store, a while back. After building it and playing with it, and letting my kids play with it, and repairing it a couple times after the kids played with it, I decided it needed a case to live in. Realization struck. The first thing I did was check Google to find out if it had been done before. As far as I could tell, it hadn’t, so I started gathering parts.
Rather than mess up my original kit, I decided to scratch build the circuit on perfboard. I used LEDs that I had harvested from a string of LED christmas lights, resistors and other bits from various sources, and the requisite mint (Wintergreen flavor) tin.
MintyPOV - [Link]
The design for this Tesla Coil is based on the larger DIY Tesla Coil project but with the aim of getting a much smaller and portable device. A Power Pulse Modulator circuit is used to drive two small high voltage ignition coils wired together in an ‘anti-parralel’ configuration. The output is rectified and used to charge the tank capacitor of a small spark gap Tesla Coil.
A Hand Held Tesla Coil Battery Powered ‘Plasma Gun’ - [Link]
The goal of this project was to expand upon the extremely popular LED persistence of vision (POV) devices that have become a staple of introductory electronic kits. By using the same POV concept as the LED-based kits, we can construct a laser projector for a significantly lower price than any commercially available unit.
Laser POV projector - [Link]
Two-photon (2-P) microscopy offers several advantages for biological imaging – in particular for non-injurious imaging of dynamic cell behaviors deep within intact tissues, organs and even the living animal. However, its widespread adoption for such applications has been hindered by two factors: commercial 2-P microscopes are very expensive, and they typically acquire images at frame rates too slow to resolve many biological processes. Both of these problems may be circumvented by building your own 2-P microscope!
Build Your Own Video-Rate 2-photon Microscope - [Link]
If you thought Sandia’s Mini-Robots were tiny, the pico (which they inspired) is even tinier at half the volume. It’s also much more impressive, with a top speed of 0.5 foot per second and a 15 minute runtime, and it’s 100% home built by Zac Wheeler from commercial available (until recently, anyway) parts.
Pico: It’s Small, Fast, Smart, And Suicidal - [Link]
The DelFly II is basically a 16-gram “ornithopter” [that] can fly for at least 15 minutes (at a maximum speed of 30mph) or hover in place for 8.” Video after the break.
The DelFly II, developed by the Delft University of Technology, is one of those miracles of construction that, at first glance, doesn’t seem to be physically possible. In a 16 gram package, this ornithopter can fly for at least 15 minutes (at a maximum speed of 30mph) or hover in place for 8. It can take off and land vertically, and can even fly backwards. It’s fully out of sight controllable thanks to realtime onboard streaming video (!). Since it uses flapping wings, it’s quiet, efficient, and robust enough to fly comfortably in wind and survive collisions with objects. Check out the video:
[YouTube] DelFly II – The Tiny Robot Spycam - [Link]
Randall converted an Arduino into AVR chip programming hardware for use with AVRDude. The project programs AVR tiny13 and other tiny AVR chips using an Arduino. He provides code and instructions to implement the Atmel AVR910 In System Programming protocol.
Arduino AVR In System Programmer (ISP) - [Link]
This is a precision ±15V regulator on a single side PCB.The circuit is based on EB-802 with design by zerosoft on www.headphoneamp.co.kr . I have replaced some components that easy to find in the market and design a new PCB that look like symmetry layout.But,you can replace the components with high quality component if you can find.
Precision +/- 15V regulator for pre-amp or headphone amplifier – [Link]