would one of those little hot plates that you see guys testing the purity of cocaine with (like in the movie Blow where Bob Gothwait he heats the coke to 187 degrees incrementally "Fuck me running 187?")..would one of those be suitable for soldering these? as i do not have a heat gun that can be dialed in (lol i dont have a cocaine hotplate either it's just an idea)
@KeithWasHere1 I've seen it done that way. But that is not the recommended way.
You'll need a temperature of about 230 C (or about 25 C above the melting point of your solder paste - 206 C is fairly typical). The problem with a hot plate is that, they are slow to heat and cool. The LEDs are very sensitive to high temperature, and will only tolerate a temperature of 230 C for a few seconds before being damaged. A hotplate may not heat and cool quickly enough to solder the LEDs before they burn
ok for some reason it says error every single time i respond to you post CHUMPUSREX..so ill ask here (and sorry if you got this question 3 times ..youtube is fubar tonight)..but do you have a part number or makers name for the type of solder paste required?
"Philips Lumileds recommends lead-free solder for the LUXEON Rebel. Philips Lumileds successfully tested SAC 305 solder paste from Alpha Metals (OM338 grade 3 and OM 325 grade 4) with satisfactory results. However, since application environments vary widely, Philips Lumileds recommends that customers perform their own solder paste evaluation in order to ensure it is suitable for the targeted application"
@ChumpusRex now does this go both ways..soldering the led to a mounting board and soldering your neg and positive leads to it? (i knew i should of bought the mounted ones..thats what i get for being cheap!)
@KeithWasHere1 I'd just use a soldering iron and regular solder for soldering the wires to the board. You could use solder paste if you want, but it's much messier.
@ChumpusRex what kind of wattage iron are we talking about? would it be prudent to use one of those cold heat soldering irons? (as seen on tv) i have never used them so i dont know if they are worth a crap,but at the very least they seem safe for the thing your soldering.(rapid cooldown).all i got is a crappy 5 dollar 30watt..it does good but its not the best.
whats the best way to solder these...i have some (without mount) in 447nm royal blue and they are so small i have no idea how to work with them.any help is greatly appreciated.
@KeithWasHere1 A professionally made PCB with solder-resist is almost essential for these. The best way to home solder these is to use solder paste, and a temperature controlled hot air gun. Place the paste on the PCB. Drop on the LED. Heat up the board with the air gun, with a thermometer attached to the board. Monitor the temperature and increase/decrease the temperature as specified in the rebel soldering instruction sheet.
They havnt a large enough footprint to dump the heat into a heatsink, also they would need some sort of clamping instead of solder so they stay put.
Ive only ever used ordinary solder for my repairs, is there a higher melting point solder that would not melt?, i would solder them to tin strips then thermal compound the strips to a chuffin big heatsink lol.
@zx8401ztv They're too small to clamp, and the thermal pad is so small that thermal paste won't help (thermal paste is actually a good insulator, just not as good as air). The thermal pad has to be soldered.
The proper way of doing it is to get a proper PCB. If you have a "wire" running to the thermal pad 20 mm wide and 20 mm long, with vias to a similar wire on the bottom of the PCB.
That way the PCB acts as a heatspreader, and you can then clamp the board to a heatsink.
Very nice small LEDs.
I bet there a bitch to solder lol.
Thanx for sharing ya videos.
Cool channel.
Subscribed*
Thumbs up*
high1voltage1rules 2 weeks ago
would one of those little hot plates that you see guys testing the purity of cocaine with (like in the movie Blow where Bob Gothwait he heats the coke to 187 degrees incrementally "Fuck me running 187?")..would one of those be suitable for soldering these? as i do not have a heat gun that can be dialed in (lol i dont have a cocaine hotplate either it's just an idea)
KeithWasHere1 1 month ago
@KeithWasHere1 I've seen it done that way. But that is not the recommended way.
You'll need a temperature of about 230 C (or about 25 C above the melting point of your solder paste - 206 C is fairly typical). The problem with a hot plate is that, they are slow to heat and cool. The LEDs are very sensitive to high temperature, and will only tolerate a temperature of 230 C for a few seconds before being damaged. A hotplate may not heat and cool quickly enough to solder the LEDs before they burn
ChumpusRex 1 month ago
ok for some reason it says error every single time i respond to you post CHUMPUSREX..so ill ask here (and sorry if you got this question 3 times ..youtube is fubar tonight)..but do you have a part number or makers name for the type of solder paste required?
KeithWasHere1 1 month ago
@KeithWasHere1 This is what it says in the datasheet:
"Philips Lumileds recommends lead-free solder for the LUXEON Rebel. Philips Lumileds successfully tested SAC 305 solder paste from Alpha Metals (OM338 grade 3 and OM 325 grade 4) with satisfactory results. However, since application environments vary widely, Philips Lumileds recommends that customers perform their own solder paste evaluation in order to ensure it is suitable for the targeted application"
ChumpusRex 1 month ago
@ChumpusRex cool cool cool..thanks man i appreciate that very much..
KeithWasHere1 1 month ago
@ChumpusRex now does this go both ways..soldering the led to a mounting board and soldering your neg and positive leads to it? (i knew i should of bought the mounted ones..thats what i get for being cheap!)
KeithWasHere1 1 month ago
@KeithWasHere1 I'd just use a soldering iron and regular solder for soldering the wires to the board. You could use solder paste if you want, but it's much messier.
ChumpusRex 1 month ago
@ChumpusRex what kind of wattage iron are we talking about? would it be prudent to use one of those cold heat soldering irons? (as seen on tv) i have never used them so i dont know if they are worth a crap,but at the very least they seem safe for the thing your soldering.(rapid cooldown).all i got is a crappy 5 dollar 30watt..it does good but its not the best.
KeithWasHere1 1 month ago
whats the best way to solder these...i have some (without mount) in 447nm royal blue and they are so small i have no idea how to work with them.any help is greatly appreciated.
KeithWasHere1 1 month ago
@KeithWasHere1 A professionally made PCB with solder-resist is almost essential for these. The best way to home solder these is to use solder paste, and a temperature controlled hot air gun. Place the paste on the PCB. Drop on the LED. Heat up the board with the air gun, with a thermometer attached to the board. Monitor the temperature and increase/decrease the temperature as specified in the rebel soldering instruction sheet.
ChumpusRex 1 month ago
Thats dam hot!!
They havnt a large enough footprint to dump the heat into a heatsink, also they would need some sort of clamping instead of solder so they stay put.
Ive only ever used ordinary solder for my repairs, is there a higher melting point solder that would not melt?, i would solder them to tin strips then thermal compound the strips to a chuffin big heatsink lol.
zx8401ztv 1 month ago
@zx8401ztv They're too small to clamp, and the thermal pad is so small that thermal paste won't help (thermal paste is actually a good insulator, just not as good as air). The thermal pad has to be soldered.
The proper way of doing it is to get a proper PCB. If you have a "wire" running to the thermal pad 20 mm wide and 20 mm long, with vias to a similar wire on the bottom of the PCB.
That way the PCB acts as a heatspreader, and you can then clamp the board to a heatsink.
ChumpusRex 1 month ago
Bright little sods arnt they :-)
zx8401ztv 1 month ago
@zx8401ztv Hot too. More than 30 seconds, and the flux starts melting on the solder!!
And that's at 25% power - I can't imagine what sort of cooling is needed for a bank of those at full power.
ChumpusRex 1 month ago