January 21, 2011
Hi y'all, just joined LMR, fantastic site, lovin' it already . . .
I am a bit of a beginner to robotics, I mean I can program and all that, and make these things, but I know not how or why they work.
One thing I have been wondering is about capacitors:
When designing a circuit, how does one know where to place capacitors, or why to have them, or how they function in that position?
With this circuit in particular (from here: http://letsmakerobots.com/node/2074), why the caps?
those two in the top-right, why do they both need to be there?
I guess my three main questions are (focussing on this circuit):
1. Why are the capacitors there? (and what they do)
2. How do you know to stick them there?
3. How do you know what type/size, or whther they must be polarised?
Any light shed on this would be much appreciated.