Using DC Motors directly with arduino

I think the OP needs to give a clue as to the spec of the motor.

As for H bridges, I was thinking of listing H bridge kits, some base on BC series (100mA ish) and 1 Amp based on BD series transistors with base loading resistors....

They are cheaper and easier to implement if you want cheap.

An upside for a DIY relay one is that you could use bigger motors (still depends on your relay , though) the ones I see normally are for max 220 VAC and something like similar DC . However you might need transistors to turn the relays on , as you'd need 4 relays a motor ..

Grumpy_Mike:

You can buy L298N

Or you can buy a decent H-bridge that is not a bit crappy.

I don't know many h bridges :D L29X , where X is usually 2,7, and 8 and words after it , like L298N or L293D XD

I don't know many h bridges

Lots to choose from here:-

http://uk.farnell.com/jsp/search/browse.jsp?N=2031+203654&Ntk=gensearch&Ntt=H-bridge&Ntx=mode+matchallpartial

Or you can buy a decent H-bridge that is not a bit crappy.

Yeah, Mike! I think we need to post a bulletin saying "L29X is an obsolete design".

Pololu doesn't even offer a breakout with the L298 on it. They have a plethora of better chips with FET outputs mounted on carriers. AND, they have example connection diagrams.

Grumpy_Mike:

I don't know many h bridges

Lots to choose from here:-

http://uk.farnell.com/jsp/search/browse.jsp?N=2031+203654&Ntk=gensearch&Ntt=H-bridge&Ntx=mode+matchallpartial

Thanks :)