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/diy/ - Do It Yourself

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362634 No.362634 [Reply] [Original]

sup /diy/ been making some kickass pcb schematics, and i cant decide on two things

1.should i use a red,green and blue led seperately, or get an all in one rgb smd package (not sure what the size difference would be really which is why i ask)

2. since im populating these boards by hand should I go with an smd or dip AVR chip? ( im torn as i love dip but idk if it would scream production quality or not, and i might try to sell a few)

>> No.362665

RGB leds can be the same size as single-color LEDs.

DIPs are still sometimes used in commercial products. DIP is easy. But if you want much smaller package size and lower lead inductance, go surface mount.

It's hard to imagine someone sniffing about the fact that you used through-hole components instead of surface mount... I'm guessing the circuit board is going to be visible?

Might be a good idea to look at EMI / EMC guidelines if you're going to be selling these, especially of the circuit board is visible. Selling a device that (unintentionally, of course!) interferes with other wireless equipment like radios and cellphones is bad for business.

>> No.362721

>>362665
so getting 3 seperate smd leds would be pretty much the same size as say a neat little packaged format?
(i havent checked my parts place for awhile so idk if they even have a smd rgb package)

also no the board isnt going to be visible, im just overthinking, i guess i could use dip , i got about 50 avrs in dip already, wouldnt be too wrong to implement i guess

>> No.362735

>>362721
>so getting 3 seperate smd leds would be pretty much the same size as say a neat little packaged format?

No, all I was saying is that you can get RGB LEDs in the same size as individual LEDs.

You can get RGB LEDs as small as 1x1mm.

But if you want, you can put 3 separate 1x0.5mm LEDs clustered together.

It's all up to you. Find out what's easier, you're the one who's going to be assembling these.

>> No.362737

>>362735
true true, i just wanted to discuss some things out loud, before commiting them to a gerber file, thx for the input bro

>> No.362739

>>362737
No problem, cheers diyfriend

>> No.362742

>>362739
if i could id email you this delicious mixed drink in appreciation, but alas, we dont have the technology ;_;

>> No.362747

>>362742
I do!

>> No.362749

/me sends delicious mixed drink (I've had a few)

And OP, bump 2/2 for you tonight. What's the project for?

>> No.362759

i would get 1206 or 0805 smd LEDs and smd avr myself

>> No.362764

>>362749
a new awesome little side usb gizmo, ill definitely post it when im finished, have a proof of concept and prototype already made, im just going into pre production stage now

>>362759
and where the hell do you learn sizing and shit for smd parts, im trying to find that to make custom parts in kicad

>> No.362785

>>362764
google SMD sizing chart

>> No.362819

>>362785
ooh, mucho danke schon

>> No.362957

If the intention is to have your board mass-produced, then SMD is usually the way to go. If you're going to assemble them by hand, then use whatever you're more comfortable with.

>> No.363007

>>362957
question about mass production, I like any /diy/er enjoy making things with my hands, but if i wanted to make a metric shit ton, what are some places you can send the files and parts lists to?

(trying to get some options aside from hiring friends with beer and pizza)

>> No.363016

>>363007
Search around for a small assembly house that's willing to do business with individuals (could be as small as a single guy with a pick & place machine).

>> No.363098

>>363016
yeah, i dunno might just invest in a reflow and pick and place, could be worth it