jamstraz
Active Member
Way too long 5-6 maybe
1.8mm LEDs = what am I doing wrong
- Thread starter jamstraz
- Start date
xl97
Master Member
Is your resistor math correct?
4.8v source
3.2v fV
??
using a 300ohm resistor.. like giving them only 5.5mA per led.... which could work.. but maybe not be so bright? (depends on the led)
4.8v source
3.2v fV
??
using a 300ohm resistor.. like giving them only 5.5mA per led.... which could work.. but maybe not be so bright? (depends on the led)
teslabe
Sr Member
Anti-Static, ESD Straps, Grounding Cords | Electronic Components Distributor DigiKey
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Rule of thumb is, no longer then ten seconds on a lead or leg of your component. Be sure both you and the iron you're are using are grounded, you, with a ground strap and the iron, with a grounded plug/outlet and an "ESD safe" label, a grounded work pad wouldn't hurt. Also a temperature controlled "ESD safe" solder station would be the best way and set the temp no higher then 600 deg F / 315 C, if you can't get good results at that temp then your iron is too low a wattage for the work you're doing. But I can't stress enough how much add extra flux to your connection will help with good "wetting".
I can easily solder a wire to a LED in 1 sec with my puny 15W iron. Make sure the end of the iron is clean and tinned - that is essential for good heat conduction. Clean and re-tin regularly.
teslabe
Sr Member
Out of curiosity, what color is the LED you're trying to get working, as "xl97" points out, you may not have enough current for the color LED you're trying light or too much and you're blowing them out. If the LED is red, they only needs about 1.7-1.8 volts were as blue and white need about 3.2 volts and green or yellow about 2.0 volt.
teslabe
Sr Member
Excellent point, keep the tip clean and coated.
jamstraz
Active Member
I need a sponge then...
jamstraz
Active Member
The LEDs are multiple colors. But this was a fail on a red and a cool white
jamstraz
Active Member
...which means I need a new iron....not my Weller I posted. Gah.Anti-Static, ESD Straps, Grounding Cords | Electronic Components Distributor DigiKey
Anti-Static, ESD Straps, Grounding Cords are in stock at DigiKey. Order Now! Anti-Static, ESD, Clean Room Products ship same daywww.digikey.com
Rule of thumb is, no longer then ten seconds on a lead or leg of your component. Be sure both you and the iron you're are using are grounded, you, with a ground strap and the iron, with a grounded plug/outlet and an "ESD safe" label, a grounded work pad wouldn't hurt. Also a temperature controlled "ESD safe" solder station would be the best way and set the temp no higher then 600 deg F / 315 C, if you can't get good results at that temp then your iron is too low a wattage for the work you're doing. But I can't stress enough how much add extra flux to your connection will help with good "wetting".
teslabe
Sr Member
The flux in the solder burns off quickly making for cold solder joints, the additional liquid flux assures good wetting, I don't use wet sponges,
I uses these, it's easier on the tip.
Hakko 599B-02 - Wire Solder Tip Cleaning Sponge With Holder
The Hakko 599B-02 is a wire sponge with a holder enclosure for cleaning your solder iron tips without water. The 599B is made from coils of brass, which is softer than the tip plating yet harder than the oxidation that forms on the tip. To clean the tip, simply plunge the iron tip into the...
www.all-spec.com
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tsenecal
Well-Known Member
for electronics, i use a paste style flux, on each part, then tin each part, and then basically hold the two parts together, and within a second for those LEDs, the solder already tinned on each item will flow, creating a clean shiny joint. my soldering iron is one of these: VIVOHOME 2 in 1 898D SMD Rework Station Soldering Station Iron Hot Air Heat Gun with 3 Nozzles 110V - - Amazon.com
modelcitizen
Sr Member
as someone before me posted, HEATSINK. i use an alligator clip between the led and where i'm soldering.
no need to spend more money and good luck.
no need to spend more money and good luck.
jamstraz
Active Member
Don't have any alligator clips :/ I really misallocated my purchases I think
modelcitizen
Sr Member
then use something else...paperclips? needlenose pliers....?
gotta improvise and work with what you got like a county jail inmate....
gotta improvise and work with what you got like a county jail inmate....
jamstraz
Active Member
….I do have paper clips....
modelcitizen
Sr Member
don't pick up the soap! lol
jamstraz
Active Member
I never drop my soap.
modelcitizen
Sr Member
lol and keep your nozzle clean!
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