Need help buying leds from Digitex/mouser

PicklesRus

PicklesRus

Well-Known Member
Can someone explain to me why all of the non-cob leds on digikey aren't mounted to a star/pcb?
Doesn't it essentially make them unusable for normal people if they aren't mounted to stars or pcbs?
There are so many LEDs there, it seems a shame they aren't usable for diy stuff. I must be missing something.

Edit: I don't know if this is a safe way to attach LED chips to stars, but if it is then it doesn't look too hard.

 
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PicklesRus

PicklesRus

Well-Known Member
No big deal, there's lots of
Videos online that explain how to attach leds to pcbs using a reflow method.
 
alesh

alesh

Well-Known Member
PicklesRus said:
Can someone explain to me why all of the non-cob leds on digikey aren't mounted to a star/pcb?
Doesn't it essentially make them unusable for normal people if they aren't mounted to stars or pcbs?
There are so many LEDs there, it seems a shame they aren't usable for diy stuff. I must be missing something.

Edit: I don't know if this is a safe way to attach LED chips to stars, but if it is then it doesn't look too hard.

Click to expand...
Why aren't resistors already soldered on a PCB?
 
PicklesRus

PicklesRus

Well-Known Member
alesh said:
Why aren't resistors already soldered on a PCB?
Click to expand...
Well that's it, if you go look at a supplier Ike digikey the majority of mono LED semiconductors they sell are just the diode without a pcb- I ended up going with a white LED strip instead because I didn't want to bother attaching (reflowing) the LEDs to the pcbs
 
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welight

welight

Well-Known Member
alesh said:
Why aren't resistors already soldered on a PCB?
Click to expand...
why do you need resistors on the PCB, most leds mounted on boards are built based on being driven by CC, so no resistor required, the only need for a resistor would be if you want to drive by CV and I would not recommend that
Cheers
Mark
 
PicklesRus

PicklesRus

Well-Known Member
welight said:
why do you need resistors on the PCB, most leds mounted on boards are built based on being driven by CC, so no resistor required, the only need for a resistor would be if you want to drive by CV and I would not recommend that
Cheers
Mark
Click to expand...
I'm confused - I see the majority of mono LEDs on Digikey come without PCB. I was trying to figure out how to use them - if I was forced to buy a mono already on a PCB my options were a lot narrower, that's why I asked.
 
welight

welight

Well-Known Member
PicklesRus said:
I'm confused - I see the majority of mono LEDs on Digikey come without PCB. I was trying to figure out how to use them - if I was forced to buy a mono already on a PCB my options were a lot narrower, that's why I asked.
Click to expand...
understand, just wanted to separate the issue of resistors on boards.
Buying seperate led emitters NOT on boards does present a lot of options. We have a lot of leds mounted on PCB online, however we probably have 3 times that available that can be ordered, its just a maintenance issue to get everything on line, my advice simply is if you tell me what you actually want and I can tell you if we have or can make it, you might find this video of us making Solderless boards on our production line worth a couple minutes of your time
Cheers
Mark
 
PicklesRus

PicklesRus

Well-Known Member
Awesome -
welight said:
understand, just wanted to separate the issue of resistors on boards.
Buying seperate led emitters NOT on boards does present a lot of options. We have a lot of leds mounted on PCB online, however we probably have 3 times that available that can be ordered, its just a maintenance issue to get everything on line, my advice simply is if you tell me what you actually want and I can tell you if we have or can make it, you might find this video of us making Solderless boards on our production line worth a couple minutes of your time
Cheers
Mark
Click to expand...
 
alesh

alesh

Well-Known Member
welight said:
why do you need resistors on the PCB, most leds mounted on boards are built based on being driven by CC, so no resistor required, the only need for a resistor would be if you want to drive by CV and I would not recommend that
Cheers
Mark
Click to expand...
I'm well aware of that :wall: My post wasn't all that serious.
Why are they selling bare resistors without a PCB?
 
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