What do I use to glue an LED into a slightly oversized hole in an aluminum faceplate. I tried Gorilla Glue super glue gel but it melted the plastic. Will a two part epoxy melt the plastic as well?
Cyanocrylate (Super Glue) glues to aluminium well, and does not dissolve plastics. Add backing soda for hardness.
a general precaution when using RTV Silcones with electronics is that some emit acetic acid while curing
likely not a problem for small glue volumes, open air constructions - but could be a potential corrosion problem if you were tempted to try potting a circuit with the wrong type Silicone
likely not a problem for small glue volumes, open air constructions - but could be a potential corrosion problem if you were tempted to try potting a circuit with the wrong type Silicone
What if I tested the LED's before the glue (gel) was completely dry. Could the heat of the LED combined with the glue dissolve the plastic? The LED's went POP and they are definitely melted.
My suggestion of the silicone caulk is mostly so you can remove the LED without damaging the aluminum panel. Two-part epoxy will not allow you to do that. Super Glue I am not sure as it is not among my favorite products.
If the LEDs went pop, there is probably too much current through them. What voltage is feeding them and to what level is the current limited?
If the LEDs went pop, there is probably too much current through them. What voltage is feeding them and to what level is the current limited?
![IMG_1820[1].jpg](https://www.diyaudio.com/community/data/attachments/558/558760-0bc48d8878546ab8be940525d2797292.jpg?hash=C8SNiHhUar "IMG_1820[1].jpg")
![IMG_1819[1].jpg](https://www.diyaudio.com/community/data/attachments/558/558781-4daf812f6d9375267ca7fe261c26e180.jpg?hash=Ta-BL22TdS "IMG_1819[1].jpg")
basic neoprene glue , blob of RTV Silicone , two-component glue of any sort
practically - whatever you have in drawer , even drop of paint
nothing mentioned will harm plastic, if you had problem it was electrical ( not enough ohms to limit current through LED)
rule of thumb - use 1K per each Volt ; more than adequate with nowadays efficient LEDs
practically - whatever you have in drawer , even drop of paint
nothing mentioned will harm plastic, if you had problem it was electrical ( not enough ohms to limit current through LED)
rule of thumb - use 1K per each Volt ; more than adequate with nowadays efficient LEDs
That looks like a 3 mm LED. You could just increase the hole and use a 5 mm LED.
The LED holder would also work, you just need to enlarge the hole.
The LED holder would also work, you just need to enlarge the hole.
I did , if you asking about those mentioning resistor
however , proof is in da pudding - either LED is junk , or resistor is wrong
regarding epoxy glue (2 component) - usually there is enough grease residue from drilling and fingers , so tiny drop of glue isn't end of world , if need to be removed later
as I said - whatever you have in drawer
however , proof is in da pudding - either LED is junk , or resistor is wrong
regarding epoxy glue (2 component) - usually there is enough grease residue from drilling and fingers , so tiny drop of glue isn't end of world , if need to be removed later
as I said - whatever you have in drawer
I agree it is a possibility, that's why I asked the question in the first place. It was an opening for Kevin to say something like: "Oops, wrong resistor. I'll fix that."
🙂
yup,not nuclear science
I had ( and will , no doubt) my share of junk LEDs (paid dearly!) and wrong resistors ;
NB - proper resistor often found on bench , later ; I calculated properly , pick it properly, just later took wrong one from mess on table
I had ( and will , no doubt) my share of junk LEDs (paid dearly!) and wrong resistors ;
NB - proper resistor often found on bench , later ; I calculated properly , pick it properly, just later took wrong one from mess on table
Kevin,
It looks like your front panel is 10 mm thick. That LED holder will only clear 1.4 mm. Either select a different LED holder or machine the panel from the back to reduce the thickness on those spots only. A pilot point drill bit will do the job nicely.
Make that 24v with no resistance. I forgot to put the resistor in the circuit.
Sorry!!
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