I wish to build a mute switch for my wired telephone. The cable into the handset has 4 wires; I assume two for the earpiece and two for the mic. I would be installing this mute switch in-line to the handset cable.
I would guess the simplest solution is to install a spst switch onto one of the wires leading to the mic. What I don't know is if this will negatively affect the phone operation with the mic circuit being open. Also, opening then closing the mic circuit might create an undesirable 'pop' on the line, which I don't want. If so, perhaps this could be eliminated with a capacitor??
To further improve this mute switch, it would be awesome if I could have a LED which indicates that the mute is active! Is there enough current in either the mic circuit or the earpiece circuit to drive a LED? I could use a dpst switch (or similar) to light the LED if so.
I have searched online to buy such a device, and was surprised to find virtually nothing.
With thanks,
Mike
I would guess the simplest solution is to install a spst switch onto one of the wires leading to the mic. What I don't know is if this will negatively affect the phone operation with the mic circuit being open. Also, opening then closing the mic circuit might create an undesirable 'pop' on the line, which I don't want. If so, perhaps this could be eliminated with a capacitor??
To further improve this mute switch, it would be awesome if I could have a LED which indicates that the mute is active! Is there enough current in either the mic circuit or the earpiece circuit to drive a LED? I could use a dpst switch (or similar) to light the LED if so.
I have searched online to buy such a device, and was surprised to find virtually nothing.
With thanks,
Mike