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Connect "NO" and "C": Unless the button is pressed, the circuit is always disconnected. Connect "NC" and "C": Unless the button is pressed, the circuit is always closed. "LED" "-": negative pole of led.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.