Fantastic. Can it be done with perhaps 4 LEDs, close to the wavelengths I mentioned above (605, 655, 715, 835)? And yes, I'm talking about a separate unit. If this can be done easier, cheaper, and quicker then I may forego the laser unit for now and try this out first. If not then an 835nm laser would be my choice.Could one LED each of those be cranked up in wattage to actually deliver noticeable heat? I'm thinking at least 25W or more?
I presume you're talking about an entirely different unit here. 25 watts is entirely doable with LEDs but not usually with a single LED.
If someone is actually willing to come up with plans for a programmable unit like this .......
Programming for the microcontroller is the easiest part of that build.
That's really great. I have other ideas but it might raise the bar a bit. For now I should probably just stick with the LED and LD units I have in mind. When I said "programmable" I meant something where the frequency of the pulse could be programmed into the unit manually. That's a whole other animal, no?