light activated sound using 555 timer
1,848 views · Published 10 October 2017 · 1:40 · Indexed 21 September 2026
Channel: All About RC · 2017 · Education
This is a circuit that generates different sounds with different frequencies when exposed to different intensities of light. A digital oscilloscope is connected to the output of the circuit to observe how frequency of the output changes as different intensities of light fall on the LDR. Higher the intensity of light falling on the LDR, higher will be the frequency of the output audio signal and vice versa.
