Reverse Photoresistor for volume control when nearing

[RW74]

How could I apply this to a speaker to reduce volume the closer a person gets to it?

 

[danadak]

Arduino and a distance sensor, use PWM in Arduino as a control voltage on a JFET voltage divider,
or a I2C variable resistor in a divider.....

Complete Guide for Ultrasonic Sensor HC-SR04 with Arduino | Random Nerd Tutorials

This post is all about the Ultrasonic Sensor HC - SR04. I'll explain how it works, show some features and share an Arduino Project example to help you with your projects. We provide a schematic diagram on how to wire the ultrasonic sensor, and an example sketch to use with your Arduino.

randomnerdtutorials.com

I2C resistor, app circuits on datasheet :

https://media.digikey.com/pdf/Data%20Sheets/Xicor%20PDFs/X9313.pdf

Regards, Dana.

 

[Delta Prime]

How could I apply this to a speaker to reduce volume the closer a person gets to it?

You can't.

 

[crutschow]

How could I apply this to a speaker to reduce volume the closer a person gets to it?

For that you need a distance sensor, not a light sensor.

 

[bertus]

Hello,

I created this new thread from a necropost and hyjack.
This is a link to the origenal thread:

https://maker.pro/forums/threads/reverse-photoresistor.283441/

Bertus