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Topic: Best Capacitors (Read 8329 times) previous topic - next topic

Drew Davis

I'm going to be buying some capacitors and was wondering which ones were best. Ceramic or Electrolytic?



Your capacitor selection depends entirely on it's role in the circuit. Different ones are best for different applications, that's why there's so many! I'm sure one of the senior members here would elaborate further on which types are most used for what. What circuit are you using them in?

Drew Davis

I'm using them to filter out noise for an analog input.


Given the options I'd go with ceramic there :)

Drew Davis

Drew Davis

Where would you buy from? Spark fun does not have any.


Jan 21, 2013, 08:52 pm Last Edit: Jan 21, 2013, 08:56 pm by BulletMagnet83 Reason: 1
Any of the big-name retailers really... Farnell, RS, DigiKey etc. Or, if I just wanted a cheapo bumper pack of different values I might order from one of eBay's HK-based sellers.

You may be able to pick up something like this https://www.sparkfun.com/products/10003 but bigger, for a lot less money, if you don't mind waiting a few weeks for it to arrive.

Drew Davis

Thanks. I think I will look for a kit.

Drew Davis

What size capacitors should I look for?



100nF is a good value.  It depends on the frequency of the input signal though, since by design it forms a lowpass filter.


Just get a ton of different values, then you'll be sorted out for all kinds of experimenting!

Drew Davis

I was looking at digikey, but they had everything from .011uf to 680uf. I would be broke if I ordered some of each! What is the range I would be using for general Arduino use?



Just be thankful your not trying to enter into the world of 'golden ear' audiophiles. They select and buy their capacitors as if they are rare vintages of wine.





I call them audio-phools.


I use a lot of 0.1u, 12/15/18/22pf. And once in a blue moon, I use 1n or 11n.

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