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remote control of intercom speaker

windyhills

Feb 22, 2023
1
Joined
Feb 22, 2023
Messages
1
Hello there. I am very noob in this so I need a bit more help.

I have a 50ohm 0.5W speaker inside my apartment intercom device. That speaker connected to the intercom's board with two wires: red and black. The intercom device itself is pretty basic, only two external wires are connected to it.

I want to insert a switch so that I can turn on/off speaker. My idea is to cut the red wire, insert a relay and then control that relay with NodeMCU.

Now, I have NodeMCU and Omron G5V-1 (5VDC). How can I wire up those 3 things to turn on/off the speaker?
I made a "schematic" so if someone could draw wires on top of this image?
2.png

Note: please do not make professional schematics, I can't read those. Just draw lines in paint (like I did :D)

Thank you very much.
 

Martaine2005

May 12, 2015
4,932
Joined
May 12, 2015
Messages
4,932
Just put your switch on the red wire. That will cancel the speaker. No need for exciting new electronics to block!.
 
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