Krzysztof Marcinek writes:
The main aim of this project was to design my very own home theater system. The first unit I wanted to build was 7.1 preamplifier. Searching the net I found Mark Hennessy site with great preamplifier project. This was really good starting point. With no need for my own researches on analog stage, I decided to expand this project with more inputs, more channels and better power supply. The unit don’t provide any kind of decoding DD, DTS etc. Surround input accepts only analog signal from external decoder, such as Denon DVD 1920 in my case.
DIY Home Theater Preamplifier - [Link]
Here is a well documented DIY tutorial on how to build a basic electronic speed controller. The article takes your through a ground up process on how to build the circuit as well as how to program the PIC that controls the speed controller. The article does indicate that the design does lack sophistication, but this is a good place to start. You could use this design as a learning process and then modify the circuit as needed. [via]
DIY Electronic Speed Controller for brushed DC motors - [Link]
When I first saw Crispin Jones Tengu, I was sure, I must have one. If you don’t know tengu and don’t want to follow the link, it’s a small face, made of LEDs, that reacts to music and sound. It did not take long until I decided to clone this funny little device. All it needs is a microcontroller, an LED matrix and a sound sensor.
DIY Tengu on a breadboard - [Link]
I haven’t used these folks but their selection is really impressive. Might be worth checking out if you need to make or build an enclosure for a project… -
Over 600 unique combinations of options are possible when you choose the DIY-1712 chassis, our most universal chassis. These options include: three base styles, 6 front panels, 8 different knobs, ventilated or blank top panels, and blank, or IEC-cutout rear panels. Our chassis are designed to accommodate both solid state and tube-based equipment, by providing you with the option of a .050″ (1.3mm) ventilated top panel, or a blank .080″ (2mm) top panel.
DIY Enclosures - [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]
Philip writes -
Actual-size Electronic Breadboard templates in SVG and other formats. A while ago I was wanting to document some breadboard circuits I was working on and went looking for an SVG-format electronic breadboard template I could use with Inkscape. The only file I found didn’t seem to be actual size so I created my own. I’ve just uploaded a variation of my original design that also includes connectors from the Arduino Diecimila alongside the breadboard. When printed at actual size the dimensions and layout of the holes on this template should be able to accept actual component leads. The template files are in the Public Domain. The files are available in SVG, PDF and PNG format and you can either use an editor like Inkscape to layout your designs or print them out and draw on top. (Because they’re actual size you could lay out the actual components on them too.)
Electronic breadboard templates - [Link]