dhenry:
At 14-15amp range, you need fairly beefy mosfets and you will need to use a mosfet gate driver for those things at moderate switching frequencies (1k or up).
Why so high of frequencies? I noticed the Pololu and Sabertooth boards mentioned going up to ridiculously high PWM frequencies over 20kHz so you can avoid a high pitched whine, but is the Arduino standard ~500Hz PWM frequency insubstantial? Also I am looking at beefy MOSFETs, like this onehttps://www.jameco.com/Jameco/Products/ProdDS/210542.pdf. Looking at the maximum rating on the drain, 72A peak, 18A continuous I should be fine right?
oric_dan(333):
Just to get some background, you might look through 6 or 15 of the sites linked here,http://www.google.com/search?num=10&hl=en&site=imghp&tbm=isch&source=hp&biw=994&bih=833&q=h-bridge
I know how to Google lol, and I know what an H bridge is. My questions are more about using MOSFETs. Yes I Googled that and I can't find any good resources on circuit designing or component selection for MOSFETS either. That's why I'm asking here is someone can either explain this kind of stuff or knows of any good resources.