is it right value

[JO12]

hiii ....
I have question about value of capacitor
is a 0.027uf ciramic capacitor and value = 27000p (273)p
is it right??
and what about another capacitor
0.082uf is it (82000) p 823 p
and
0.001uf 102p
and
0.0027uf
0.001uf
etc..

[bob91343]

The first one, .027 microfarads is indeed 27000 pF.
The .082 is 82000 pF.
The .001 is 1000 pF.

To convert microfarads to picofarads you use a factor of 1 million, or 10 to the sixth power. These days, many use nanofarads, which uses a factor of 1000. So a .01 microfarad capacitor is 10 nanofarads, or 10000 picofarads. Just move the decimal point the required number of places, using zeros to fill gaps (or removing leading zeros) where appropriate.

[40 watt]

here is a handy conversion table

[tangmonster]

As a side note.

If you are going to use that circuit with an AC adaptor i would use a 12V adaptor and use another 7809 to the the 9V which should be much cleaner.

IF you are going to use it with a 9 or 12V battery permanently that configuration is just fine.

[JO12]

I bought ceramic capacitor
for 0.027uf written on capacitor (( 2E273K ))
and another one for 0.082 (( 2G823K ))
is it right
and what dose 2E***K mean
ceramic capacitor
like this
green one

[AndrewT]

193x197 pixels does not show sufficient detail.

A close up of both sides of each type would be much more informative.

[infinia]

green ones are asian Mylar film >Not Ceramic

1H = 50V
2A = 100V
2D = 200V
2E = 250V
2G = 400V
2J = 630V

Tolerance Code:

K = ±10%

[Prophetmaster]

This capacitors is not ceramic All capacitors on a photo with a film insulator.
2E - may be type of insulator, K - capacitor may work up to 63 V

100pF=0.1nF=0.0001µF 101
1000pF=1nF=0.001µF 102
10000pF=10nF=0.01µF 103
100000pF=100nF=0.1µF 104
1000nF=1µF 105

[Prophetmaster]

"2E = 250V"
This are low-voltage capacitors on a photo! 250V - capacitors will fail!

[kroto]

I've been seen an article on wikipedia about capacitor coding (also with color code).
go search there, it may help you much.
If I wasn't wrong, 2E for 250Vdc and
K for tol'+/-10%.