Re: Digest Number 537
- Thanks Jack,
I just put some L298's on order. I couldn't find them locally (Northbay). I just hope they get here in time for me to be ready for the next meeting. I may just try making a "Roll Your Own" motor controller in the mean time. I'll let you know how it goes.
--- In firstname.lastname@example.org, "Jack Buffington" <j1432@h...> wrote:
> I'll get two replys with one stone here...
> You could check out the L298N H-bridge chip. It can handle up to 55 Volts
> and 3 Amps. That is what I am using on my corner-finding robot. I have
> gotten the robot far enough that the robot can move on its own but needs
> some programming to be able to follow a wall. If only I had more free
> time... In any case, you could check out the very disorganized page that I
> have on my website about h-bridges.
> I see that I am quoting a different spec for the L298 on that page. Maybe
> the 298 and 298N are different or the specs have changed.
> If you are really adventurous you could try making your own! I have before
> and have run into a lot of trouble. These days things are a bit different.
> Circuits are different too. I have wanted to try building an H-bridge out
> of some IRLZ44 Hexfets and some good Schottky diodes for a while now but it
> is that time thing again...
> Two wheels that are offset should work but might make your navigation
> trickier. It will take a little extra torque to turn the robot because you
> will be forcing the wheels to slide sideways just a bit when you are
> turning. Other than that it should work. One thing you might do is think
> about getting some bevel gears. That way you can have your motors side by
> side and then have your wheels aligned. I bought some bevel gears from
> Stock Drive Products a few months ago. I think that they were only $14 for
> a pair of them.
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