U.S. CitiesCity-Data Forum Index
Covid-19 Information Page
Go Back   City-Data Forum > General Forums > Science and Technology
Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
View detailed profile (Advanced) or search
site with Google Custom Search

Search Forums  (Advanced)
Old 07-19-2012, 10:31 PM
3,614 posts, read 3,132,542 times
Reputation: 910


I could probably find a more specific forum to post on, but I'll start with the good old CityData for some help.

I recently destroyed my lanyard for my flash-drive. As a replacement, I wired up a loopback adapter with cat6 to act as the "loop" on the flash drive, and would like to make another end with a keystone jack to act as a quick-disconnect and lanyard.

But, I want it to be more. I'd like to jam a little 3V battery inside the keystone, wire it up to an LED, and have it light whenever the flash-drive is missing.

But the question I have is "how."

I imagine it's possible to do with some kind of switch, I just don't know how to switch off the power to the LED when the loopback is connected, and turn on the LED when the loopback is disconnected.

Reply With Quote Quick reply to this message

Please update this thread with any new information or opinions. This open thread is still read by thousands of people, so we encourage all additional points of view.

Quick Reply

Over $104,000 in prizes was already given out to active posters on our forum and additional giveaways are planned!

Go Back   City-Data Forum > General Forums > Science and Technology
Similar Threads
Follow City-Data.com founder on our Forum or

All times are GMT -6.

© 2005-2020, Advameg, Inc. · Please obey Forum Rules · Terms of Use and Privacy Policy · Bug Bounty

City-Data.com - Archive 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35 - Top