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I got an Email notifying me that somebody commented my Instructable "Connecting a 12V Relay to an Arduino":


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From: dustinandrews
Date: Sep 4, 2010. 2:48 PM
Subject: https://www.instructables.com/id/Connecting-a-12V-Relay-to-Arduino/step7/Assembling-the-Circuit/

The relay won't turn back off. I have the same setup as you with a 2n2222 NPN transistor. My relay read as this one across the coil. When I apply 12v to the coil circuit all is well. When add power from the arduino to the transistor base, the relay activates. However, the relay stays activated until I disconect the 12v. My "12v" supply is actually reading 13.2v with the meter. Am I possibly overloading the transistor and it stays stuck on?

reply: https://www.instructables.com/you/backtalk/?action=reply&commentId=CRWA0ZRGDNIZCED

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but the comment doesnt show up and I cant "backtalk".


greetz Daniel

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Kiteman

8 years ago

Possibly the poster deleted their comment before you got to see it?

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homunkolossKiteman

Reply 8 years ago

OK. That would be possible.
Thanks.

greetz Daniel