Digikey Samsung LM301b question

Dryxi

Dryxi

Well-Known Member
I was told i should repost this here.

Are these the same diodes that are found in the QBs and is there a guide on building a light with a reel of diodes instead of the solid strips?

Also am I reading it right that the QB550 has 1152 diodes and costs 1,000$, but I can buy 4000 diodes for 450$? So I could theoretically make 3+ lights out of that 450$ (not including buying a driver, heatsink, etc)

https://www.digikey.com/product-det...inc/SPMWHD32AMD7XAU0S0/1510-2385-2-ND/7802604
 
boilingoil

boilingoil

Well-Known Member
Dryxi said:
I was told i should repost this here.

Are these the same diodes that are found in the QBs and is there a guide on building a light with a reel of diodes instead of the solid strips?

Also am I reading it right that the QB550 has 1152 diodes and costs 1,000$, but I can buy 4000 diodes for 450$? So I could theoretically make 3+ lights out of that 450$ (not including buying a driver, heatsink, etc)

https://www.digikey.com/product-det...inc/SPMWHD32AMD7XAU0S0/1510-2385-2-ND/7802604
Click to expand...
A lot more work to be done with single diode's reels. Board designs, board printing and re-flowing of the diodes to the boards.
By the time you add it all up, you'd be better off buying them already made unless your going to mass manufacture them.
 
Dryxi

Dryxi

Well-Known Member
boilingoil said:
A lot more work to be done with single diode's reels. Board designs, board printing and re-flowing of the diodes to the boards.
By the time you add it all up, you'd be better off buying them already made unless your going to mass manufacture them.
Click to expand...
Is a board needed? You can't use those to build a light similar to the diy strip builds?
 
boilingoil

boilingoil

Well-Known Member
Dryxi said:
Is a board needed? You can't use those to build a light similar to the diy strip builds?
Click to expand...
No, you'd have to use at the min star boards 1-4 chips per board which will require re-flowing still. It's a reel not a tape, as those are single diode with no electrical pathways from one chip to the next.
 
JavaCo

JavaCo

Well-Known Member
Have fun doing this 4000 times ...... You have to have a re-flow machine for it to be feasible to use these chips. If not you are going to get your ass kicked on time+ labor. Doesn't even go into the cost of the boards the chips need to solder too.
 
Moflow

Moflow

Well-Known Member
Heres what he done I copied n pasted this from another thread,

A reel has 2500 diodes, pcb's need to maximize usage so no leftovers. basic math 2500/384 = 6.5 boards. 5000/384 = 13 boards. no leftover diodes. For this job a reel of Samsung LM561C S6 bin cost $150/roll. two rolls per job for 13 pcb's on completion.
 
Dryxi

Dryxi

Well-Known Member
Ok thanks for all the replies. I understand now. Ya I thought the reel was those led strips that have the tape and such. Didn't realize it was legit just the diodes alone.
 
verticalgrow

verticalgrow

Well-Known Member
JavaCo said:
Have fun doing this 4000 times ...... You have to have a re-flow machine for it to be feasible to use these chips. If not you are going to get your ass kicked on time+ labor. Doesn't even go into the cost of the boards the chips need to solder too.
Click to expand...
 
Passel

Passel

Member
Hmm, that pick and place machine is putting on chips, but on other side guy is taking board off conveyor - how? Did they cut out video of reflow oven in between?
 
boilingoil

boilingoil

Well-Known Member
Looks like they panned the camera to fast but he looks like the oven is on his left as he's removing them from it at the end
 
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