Note that poly capacitor's are no good for decoupling, which is the main use of a 0.1uF capacitor with the Arduino. They need to be ceramic.
work better at high frequencies.
Would you care to give rough figures? To many 16MHz is a pretty high frequency?
Russellz said that poly caps work better at higher frequencies
I said "electrolytes" to prevent our resident one-upmanship-engineers here from "reminding" me that an electrolytic capacitor contains electrolyte... but I got hammered anyway for the insulator thing.....
Just to explain, they have lower series inductance and thus work better at high frequencies.Russell.
No he didn't. Read reply #15 again.
Only because you said something that was directly wrong. No other complaints.My rule is to make it as simple as necessary, but never by asserting something that is clearly incorrect. That is not a valid educational principle because it can and will impede further learning, sooner or later.
How was I wrong? Is the material between aluminum sheets not paper? Is not the paper saturated (or at least wetted) with an electrolyte of sorts?
Electrolytic capacitors such as the kind you described are made by taking two long, thin sheets of aluminum, separated with paper saturated with an electrolyte and rolled up into a cylinder. Each foil sheet is one terminal.
To make a high value, small capacitor, you have to minimize aluminum foil thickness and paper insulator thickness.Now, when the paper insulator is very thin, it won't take much voltage to break it down and short out the capacitor.