If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)

Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie

LED Question

upandcumming · 2010-07-02 02:17:53

Hey my boss asked me to do some electrical work earlier and I was wondering if someone could help me: When someone presses a button, I need an LED to come on; easy enough, but what I need is the LED to stay on when they release the button, until I press another button to stop the current to the LED. Possible? Cheers!

Options

02-07-2010 3:17am

#1

upandcumming

Registered Users Posts: 2,718 ✭✭✭

Join Date: February 2010

Posts: 2669

Hey my boss asked me to do some electrical work earlier and I was wondering if someone could help me:

When someone presses a button, I need an LED to come on; easy enough, but what I need is the LED to stay on when they release the button, until I press another button to stop the current to the LED.
Possible? Cheers!

0

Comments

Options
#2 02-07-2010 1:10pm
DublinDilbert

Registered Users Posts: 5,379 ✭✭✭

Join Date: July 2006

Posts: 5140

Quickest way is to use a small relay.

You'll need a normally open start switch and a normally closed stop switch.

When I'm near my pc I'll draw you a diagram.

Is the whole system being run from 12v or something?

0
Options
#3 02-07-2010 1:21pm
DublinDilbert

Registered Users Posts: 5,379 ✭✭✭

Join Date: July 2006

Posts: 5140

This web page shows you how to do it:-
http://www.eleinmec.com/article.asp?24

The exact circuit you need is shown in:-
http://www.eleinmec.com/figures/024_03.gif

0
Options
#4 02-07-2010 1:21pm
FarmerGreen

Registered Users Posts: 1,134 ✭✭✭

Join Date: May 2008

Posts: 986

Like this?

0