Edgy
Newly Enlightened
Has anyone had any experience with a seoul p7 diode burning out from soldering? It seems that I may have burned out my diode last night by accident. Are they always this sensitive to heat?
A question for the pros on cpf
- Thread starter Edgy
- Start date
Help Support Candle Power Flashlight Forum
lolzertank
Enlightened
All electronics in general are sensitive to heat. Soldering is usually far above their maximum rated operational temperatures, and you really need to do it quickly.
What type of soldering iron were you using? If you have a temp controlled one, what temperature was it set at?
Were you trying to reflow the bottom pad onto a star with a soldering iron?
What type of soldering iron were you using? If you have a temp controlled one, what temperature was it set at?
Were you trying to reflow the bottom pad onto a star with a soldering iron?
Edgy
Newly Enlightened
well i was just simple soldering a positive lead onto the positive solder pad on the star. I accidentally soldered the positive lead to the positive lead in the led by mistake but i let it cool and then removed the lead and placed it back into the correct position. My soldering iron is a cheapo walmart one and does run quite hot. I tried to solder with the star on top of a wet sponge to keep it cool. The strange thing is that the led is receiving 4 volts from the battery but isn't producing any light. The led isn't discolored so I'm not sure if its really burnt or not.
The slug on the p7 is not isolated. It is actually bridged with the positive lead. Check to make sure that your heatsink is insulated properly from the slug. If the slug is making direct (metal on metal) contact with a negative source (heatsink or negative lead) then you are not going to get any light, but you will get a lot of heat, and are likely to do some damage to your emitter/driver/switch/battery. The easiest way to test is to desolder the wires from the emitter, hook up your multimeter and check for continuity between the positive lead and your heatsink. If it shows continuity, then you haven't properly isolated the slug from the heatsink.
I've made this mistake numerous times (positive slug emitter is a poor design). Sometimes it causes permanent damage, sometimes it doesn't.
I've made this mistake numerous times (positive slug emitter is a poor design). Sometimes it causes permanent damage, sometimes it doesn't.
Edgy
Newly Enlightened
Ok dumb question, but how do i check for continuity using my multi meter? Never done anything like that before :sigh:
