I have already have pretty extensive knowledge of the ROBOTC programming knowledge which I plan to use to progam this project from VEX (Woo! 6252 The Surge!), so I don't think I'll be needing any help with that, just hardware. I am also currently in a Computer Applications class where we are briefly touching on Arduino, so I can use that as a resource for early testing and such, and learning basic hardware and such. I also know some circuitry from one of my other classes. Hoping you guys can help me out with starting this project as soon as VEX season gives me a little time to do it.
Thanks,
James D.
Yeah, I was planning on making the concept first, one string, then 8, then the full thing etc. and the only reason I meant to use the LEDs was price, and I couldn't find another way to do it... Could you link me to this photo transistor you speak of?
EDIT: Someone already showed me a good photo-sensor on a different thread
Yes, I would also like to see if I can do MIDI output. Not sure how, though I did find a tutorial for it on the playground. And Grumpy_Mike (it's weird referring to people by usernames...) how did do a wave table? Sounds like what I's want to do.
I used an iPad running OSC to control a processing application. This allowed me to define a set of envelopes for each harmonic. This was then converted into a wave table and downloaded into the arduino where it was stored in external EEPROM on the I2C bus. When a wave table was required the arduino picked out one of the previously downloaded ones and transferred it to External SRAM on the SPI bus. This was read under an interrupt and transferred to an external D/A on the SPI bus.
I have the impression that the actual way a "laser harp" is implemented, is that you use a single dimension scanner as in a laser "light show" to generate the individual "strings" from a single laser; the light sensor simply detects from the sequence which string or strings are being played, and issues MIDI commands to a synthesiser accordingly.
In other words, it is not a set of modulated beams with the various frequencies.
cliveharper:
I have everything needed to build a laser harp, i just cant get the TTL modulation to blank to show just the dots without the centre line....
Not sure I understand that.cair to post a schematic?
Nope the schematics are private... Brought and paid for..
Just need advice on how to get the TTL modulation to work, harp builders will know what i mean...
Laser Harp hardware == a set of light-interrupt buttons.
Nothing more.
The software is where "the magic" that plays the music and interfaces with the user resides. It's "magic" because the input is adjusted to fit the song, you need zero talent to play one which probably helps loads with the listening.
