Analog feedback - oscilloscope & Lite2Sound BC
Oct 7, 2018 builds p26-lite2sound-bcContributed by Kevin Reid on Oct 7, 2018
Light from the oscilloscope screen hits a photodiode, producing an electrical signal which is amplified and fed into the oscilloscope input. Modulation results from the the beam moving off the screen, passing under the black graticule (grid), or being obstructed by objects in front of the screen.