I need to design a pcb that has few smd elements like ne555, resistors, tiny leds and capacitors. All must be very small like 5x3in or even smaller.
What are the proper sizes and numbering of the mostly used smd elements and components on pcb smd boards? Can anybody help me with such information?
The circuit is 3.3v with 5v input
Thanks!
You should use what works for your design.
Some are so small.. that doing them by hand is pretty difficult.
Common SMD sizes for resistors/caps are:
1206
0603
0402 <-- pretty small to be soldering by hand.
LEDs too... but they get bigger as well...5050's..etc
The circuit is 3.3v with 5v input
That means nothing.
When you look up a part in a PDF data sheet, it will tell you the availabile packages.
xl97:
You should use what works for your design.Common SMD sizes for resistors/caps are:
1206
0603
0402 <-- pretty small to be soldering by hand.
Dont forget 0805.
5x3 inches is huge for a 555 and a couple of supporting components. Even in throughhole, that's a couple of square inches (could even do it on protoboard)...
srnet:
Dont forget 0805.
100% correct!
If you going to start doing SMD then IMO it's nice/worth having a ruler like this to give you a good idea of package sizes and if your likely to be able to hand solder them.
Deous:
I need to design a pcb that has few smd elements like ne555, resistors, tiny leds and capacitors. All must be very small like 5x3in or even smaller.
What are the proper sizes and numbering of the mostly used smd elements and components on pcb smd boards? Can anybody help me with such information?
The circuit is 3.3v with 5v input
Thanks!
You need to spend some time with a parametric search engine of a major electronics supplier - you'll learn
all about what packages are available, as this is one of the search keys.