Re: Laser Harp kits - Batch 2 - 14 left!
1. When buying a laser, the power can be whatever you can afford. However, as you'd already know, lower power beams won't be as visible. It also means you'd need to operate the harp in complete darkness in order to get a distinct reflection into the sensors. I'd recommend at least 50mW green, which is cheap and plentiful from China these days. Higher power is better of course, though keep safety in mind too.
2. Any laser with TTL or analog modulation input will work.
3. Whatever you can afford. Even the cheapest of cheap crap galvo's will work fine for this (Although I wouldn't recommend open loop for stability reasons).
4. Case can be whatever you want. Keep in mind that your galvo amp will probably require heatsinking, so a metal case may be more convenient. If you look back in the thread though, you can see some very create case ideas!
5. The only programming you'll ever need to do is to change settings like the note banks, however the kit will work right out of the box because we have programmed in some default values. How to program the harp is included with the instruction csshih emails to everyone.
6. The laser harp outputs MIDI data. This isn't actually sound, it's a form of serial data. You can connect it to any MIDI compatible device, for example synthesizers/keyboards/drum machines, whatever. You can get MIDI to USB adapters for your computer on eBay for under $5.
