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LED installation - beginner questions
severdhed:
hey guys, in my last panel, i installed two novagem buttons from GGG and they are awesome. I have the labeled inserts and use them for pause and exit. so naturally when building my new panel, i want to have a light up exit button. however GGG is sold out of these buttons. So, i ordered a red translucent iL button, and a red button blaster LED from GGG. the LED came with the resistor, but i'm not sure how to do this.
1. one wire on the LED is longer than the other, which one needs the resistor soldered to it?
2. when i connect these the teh 5v line on my power supply, does the side with the resistor go to the 5v or the ground?
3. is the resistor directional, or does it not matter which way it is turned when soldering it to the LED?
i only got 1 LED, so i'd rather not destroy it.(should have ordered a few more i guess)
HaRuMaN:
1) resistor can go on either side
2) doesn't matter, resistor just restricts current flow
3) resistor is not directional, either way is fine.
severdhed:
how about securing the LED to the button itself? I tried using hot glue before to hold LEDs, but after they are on for a while and get a little warm, the glue would melt and they would fall out. i guess there is always super glue
HaRuMaN:
Did you drill a hole in the bottom of the button, and insert the LED first?
RandyT:
--- Quote from: severdhed on August 19, 2010, 12:54:52 pm ---how about securing the LED to the button itself? I tried using hot glue before to hold LEDs, but after they are on for a while and get a little warm, the glue would melt and they would fall out. i guess there is always super glue
--- End quote ---
You need to use just the correct size bit and press-fit the LED into place. If you made the hole too big, you might need a glue which can fill gaps. You could also use a high temp hot melt, but honestly, I think it's the type of hot melt, or the very low temperature of the gun you are using that is allowing the glue to separate from the parts.
The long leg is the Anode (+) and the short one is the Cathode (-).
RandyT
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