A newbie Question about Caps.

[deletemeplease]

Hi!

I'm trying to order the parts for my MBHP core module but i'm a little confused about a couple of things :-/.

Firstly, ceramic capaicitors - my local electronics store Maplin (www.maplin.co.uk) sells "Decoupling Ceramic Disc Capacitors", "Metallised Ceramic Plate Capacitors", and finally "Resin-Dipped Ceramic Capacitors". Which do i need for the board (the values are 100 nF, 330 nF, and 33 pF).

From TK's pictures they look like resin-dipped caps to me  ;). Does it make any difference which i use?

Also a question about resistors (hope i'm not boring you!):

Maplin doesnt stock the 0.25w resistors that i needed for my JDM programmer (which i built! yeah!) so they said 0.6w ones will work fine.  Is the wattage\voltage rating the maximum watts\volts it can handle, or the optimum working condition?  I guess its the maximum voltage but i'd like to be sure before one of my caps gets too much voltage and blows up in my face  ::).

Thanks for your help guys, and thanks to TK as it's giving me a better understanding of MIDI and MIDI hardware !

Paul

[dragon]

Hey,

As for 100nF and 330nF you can take Metalised Polyester Film capacitors and for 33pF Metallised Ceramic Plate will do the job

You are right, wattage rating is the max value resistor can handle, so everything above the 0.25W is ok

dragon

[deletemeplease]

Cool.. Thanks dragon.

Blimey, a bit of common sense and educated guessing actually pays off!  8)

EDIT: If anyone is stuck with converting values (e.g. nF to pF or µF) there is a value converter on this page http://www.free-treasures.com/units_converter.htm . Scroll down to "The Prefixes of the S I" then click on the Conversion Calculator.

Or here is a direct link:

http://www.ex.ac.uk/cimt/dictunit/ccprefix.htm

8)