Ok i get through a couple of tutorials.
The thing confusing me is the huge library. Any eagle expert, Please say a word or two about this library! (i am using single sided pcb and just trying to make 555 timer schematic in eagle). The problem is that i can't figure out which component to pick.
This is normal and we all went through it. The library has to be huge on any good program of this type because there are a huge number of parts out there.
Suppose i want to add this resistor (
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Which resistor should i select from the library?
As I said in another post the passives are mostly found in the RCL library. You have a choice of R-US or R-EU symbols. For now click on the R-US, then you can click on each resistor and and it will show enough info to figure out which one you want. The first resistor is listed a R-US_204/2V. You use this if you want a 7.5mm resistor to mount upright in the board with one end sticking up. You can see the foil pattern and the symbol to the right of the list of devices. Under the foil pattern you will find more info about the resistor
RESISTOR, American symbol
Package: 0207/7
RESISTOR
type 0207, grid 7.5 mm
For 1/8 watt resistors I use R-US_0207/7.
and for a capacitor!
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Which component from the library?
You want an electrolytic cap. In the rcl library choose CPOL-US or CPOL-EU. There are a lot of caps from different vendors. I you can not find an exact match pick one with the same space between the leads and a similar diameter. A digital caliper can be handy here.
For electrolytic caps with .1" (2.54mm) spacing I often use
CPOL-USE2.5-5 (CPOL-US) <-- CPOL-US is lib name
For the little .1uF bypass caps with .1" spacing I use
C-US025-024X044 (C-US) <--- C-US is lib name