On Thursday, June 19, 2014 5:52:39 PM UTC-4, Pico Rico wrote:
That's what I would do.
An LED is a Light Emitting Diode. A diode is a device that transmits in one direction. It's essentially a short in that direction.
Whoops, that's not gonna work, is it? It shouldn't transmit at all in the other direction, unless you're above breakdown voltage, which you probably are.
Something about that circuit is making a switch that should be Normally Open act as if it were Normally Closed. The diode sounds likely. You could just snip the diode wire. That would be a good test.
On Friday, June 20, 2014 1:28:04 PM UTC-4, Mark Lloyd wrote:
Yeah. The LED sounds less likely now that I think about it. It wouldn't act as a short unless the current limiting series resistor had failed, and if that happened the LED should burn out and go open, stopping the chime.
As others have already mentioned, you probably bought a lighted button. The
filament in the bulb is conducting enough current to trigger your doorbell.
I encountered this same situation a few months ago at my in-laws. They have
a battery operated doorbell that wouldn't support a light anyway. So I just
cut the leads to the light on the button. It works fine now.
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