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Wired Lighted Gold Doorbell Button

Utilitech Wired Lighted Gold Doorbell Button

4.7
103
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4 Questions
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why does my old doorbell button have a resistor inside. The new one does not have one.


Your old unit probably had an AC lamp light source, new one has a Light Emitting Diode. Requires current limiting resistor, voltage rectification.

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