[Charlie] has been making a diy Spectrophotometer, as well as while it is a “shambling mess of information-age technology!” it is still much much better than ours. Focused around an arduino, bits of lego, as well as a flashlight, this innovative gadget rotates a diffraction grating (flake of compact disc) aimed at a picture resistor. As the light spectrum is passed over the sample, the picture resistor measures exactly how much light is showed as well as that data is passed back to a pc.
As nothing is as ever simple as it should be, a huge issue popped up with utilizing a servo. It was method as well course, meaning the entire spectrum would be jumped over in 6 steps. A quick robbery of a gear assembly from a floppy disk drive as well as the motor motion was smoothed out. A bit as well well since 120 degrees of the servo is not rather sufficient to cover the entire spectrum. Oh well there is always space for improvement.