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# A simple qestion...(plese)

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#### Someone Electro

##### New Member
How do i know the capacity of a ceramic capacitor? :?:

If on the capacitator is labled:
104
LP

Then the capacity is 104 pF? :roll:

PS:
I know its a stupid qestion but i never used a ceramic capacitor!

It works very similar to a resistor code except minus the colours. So your 104 capacitor is in fact 1 0 0,000 = 100nF. The third digit is usually the multiplier if you haven't already guested!

Olly's answered the question perfectly well, just piping in with my \$0.02.
Most caps are spec'd in pF, unless otherwise indicated. Just convert the 3rd number on the cap to zeros, so 103 becomes 10,000pf => 10nF => .01uF. and 104 is 10 0,000pF => 100nf => 0.1uF. Engineers prefer to move the decimal point three places at a time, it's simple and easy to remember. Small-valued caps usually have only the pF number printed on them, so you'll see something like 47, or 680. A capacitor's physical size is a rough indicator of how to interpret the number printed on it, though watch out for the newer "supercaps" (1 Farad@2.5V in a thumbnail sized-package can be found).

It probably isn't needed on this board, but

- CAL

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