Hi yavid,

If you would like to use USB instead of a serial port, you can buy a USB to serial converter for about $15. Though programming is much quicker directly through a serial port. Alternatively, to add USB support to the MiniPOV kit is possible, but not a beginner’s project.

Adding a volume control is pretty easy. Just add two potentiometers. Search through this blog (you might have to search through both pages) for “volume”.

Using a 9v battery isn’t a good idea. You can do it, but you’ll need a DC-to-DC converter or a voltage regulator. If you want smaller batteries, try a CR2032 coin cell.

Using different colored LEDs may be fun to play with.

I’ve been working on a bunch of projects, including TV-B-Gone Pro, as well as making the Brain Machine into a ready-made manufactured product that people can buy (I’m calling them Trip Glasses). Doing Maker Faires and other geeky conferences has also taken lots of time and energy (but way worth it!). These and other projects have slowed down my progress with the advanced version of the Brain Machine that will help people sleep. But I hope to have a version of it ready this summer.

Best of luck with everything! Please post back to this blog with any results.

Mitch.