Vermes
Advanced Member level 4
The schema of this device consists of two tda2003 amplifiers connected to two heads from discs and stabilizer 3V fot lm317 to power the laser.
A green laser 10mW was used in this project. Head positioning is done on springs because in the case of heads, magnetic positioning is not an option. The vertical control head falls into the resonance, so some brackets were added. Unfortunately, they don't help too much and the resonance distort the image.
The projector displays Lissajous curves, showing the ratio of the two frequencies sine waves.
Link to original thread – Projektor laserowy HDD-sterowany dźwiękiem