David Swinscoe's Electronics Pages                 Capacitors

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Capacitors of values between 2.2pF and 470nF are not polarised so can be connected any way round.

Values stocked are:
Non-electroytic capacitor
 
2.2pF
4.7pF
10pF
22pF
47pF
100pF
220pF
470pF
1nF
2.2nF
4.7nF
10nF
22nF
47nF
100nF
220nF
470nF

Disc ceramic capacitors are marked with a three digit code. The first two digits give the two digits of the value and the third digit tells you the number of 0s, the value is always in pF.
Example 223 is 22000pF which is the same as 22nF.

There is a capacitor code calculator to convert the codes for you.

Press the button for the code calculator

Alternatively, try your your own skill with an instant test on reading capacitors or try Nick Reeder's capacitor game (check out Nick Reeder's pages at Sinclair College)

But be careful sometimes a 100pF capacitor is marked 101 and sometimes 100 so you may have to check it with a meter!

Some of the small ceramic capacitors are marked with the value in digits and letters p for pico or n for nano. The letter is in the place of the decimal point.
Examples: 2p2 is 2.2pF, 47n is 47nF, n22 is 0.22nF=220pF

Capacitors of 1mF and larger are all electrolytic. It is very important that you connect these the right way round otherwise they can explode! The negative end usually has - sign next to it or an arrow pointing to the - lead.
electrolytic capacitor
1mF
2.2mF
4.7mF
10mF
22mF
47mF
100mF
220mF
470mF
1000mF

Components