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Old 20th May 2010, 07:31 PM   #1
JO12 is offline JO12  Dubai
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Default is it right value

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..
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Old 20th May 2010, 08:02 PM   #2
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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.
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Old 20th May 2010, 08:44 PM   #3
40 watt is offline 40 watt  Canada
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here is a handy conversion table
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Old 21st May 2010, 06:04 AM   #4
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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.
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Old 21st May 2010, 04:27 PM   #5
JO12 is offline JO12  Dubai
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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
Click the image to open in full size.
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Old 25th May 2010, 10:40 AM   #6
AndrewT is offline AndrewT  Scotland
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193x197 pixels does not show sufficient detail.

A close up of both sides of each type would be much more informative.
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Old 25th May 2010, 11:22 AM   #7
infinia is offline infinia  United States
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green ones are asian Mylar film >Not Ceramic

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


Tolerance Code:
K = 10%
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Old 25th May 2010, 11:42 AM   #8
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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=0.0001F 101
1000pF=1nF=0.001F 102
10000pF=10nF=0.01F 103
100000pF=100nF=0.1F 104
1000nF=1F 105
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Old 25th May 2010, 11:51 AM   #9
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"2E = 250V"
This are low-voltage capacitors on a photo! 250V - capacitors will fail!
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Old 25th May 2010, 12:07 PM   #10
kroto is offline kroto  Indonesia
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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%.
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