0,0047uF = 47pF?

[Bas Horneman]

Sorry for asking such a trivial question...but
is 0,0047uF equal to 47pF???

[jean-paul]

No, it's 4.7 nF. Which is the same as 4700 pF.

On your calculator:
uF is 10 with exponent -6.
nF is 10 with exponent -9
and pF is 10 with exponent -12.

Note that the international way to express these values is by using a dot instead of a comma. In Europe we write down 4,7 which confuses others. We write down 10.000 for ten thousand whilst the Americans write down 10,000 for the same thing.( If I'm correct ).

[Austin]

.0047uF would be 4.7nF and 4700pF

uF=10^-6
nF=10^-9
pF=10^-12

Austin

[Bas Horneman]

47pf would thus be 0,0000047uF?

Thanks for the replies!

[UrSv]

Originally posted by Bas Horneman
47pf would thus be 0,0000047uF?

Thanks for the replies!

No, it would be 0,000047uF.

/UrSv

[jean-paul]

Bas, if you use the 0,0000xxx way of noting values errors creep in easily.
Try the exponent way of expressing these values on your calculator and your cross over filters will require much smaller caps ( or bigger ) than you calculated before

[chris ma]

Hi,

Please check the numbers here

[sam9]

Who decided on making a Farad so big, anyway? Ocassionally, ones sees a 1F cap used for an autosound system (the one that drives you nuts sitting at a stop light, no doubt). Otherwise, it seems of no use except to microwave a cow or fire up 'ole sparky.

[chris ma]

Ah...Far..rad....I remember there used to be a guy around called Faraday, might have been a DIYer too....
Chris

[jan.didden]

Originally posted by sam9
Who decided on making a Farad so big, anyway? Ocassionally, ones sees a 1F cap used for an autosound system (the one that drives you nuts sitting at a stop light, no doubt). Otherwise, it seems of no use except to microwave a cow or fire up 'ole sparky.

I think they defined it as a cap that gets charged 1 volt by 1 Amp for 1 Sec. They really couldn't predict we would be working with uamps 100 years later, could they?

Jan Didden