| |
> > 1) What is a good battery to use? I don't have 8 nicad batteries.. I
use
a
> > R/C car 9.6V battery pack.. is there some specific need for certian • mAh
> > values?
> The recommended battery pack I ordered from DigiKey is rated 9.6V at
> 500mA.
> So, Don't over kill the board. And I think the motor chip L293D can go
> up
> to 700mA (the TI SN754410NE can go up to 1A) (I think I am right)...
> So,
> watch out...
Oh, you are missunderstands some "electrical" details :)
You can use a battery pack with 9.6V and 2000 mA or more if you like,
because the unit is exactly mA/h.
It means you can get this current over a time of one hour. Or the
half current over 2 hour's.
The current of the motor chip is only limited of the resistor (from
motor and the cables to the motor). That the reason why you can't use
a "big" motor with the L293. The Motor get's too much current.
(but you can limit the current with a resistor)
hope it helps :)
PS: Sorry about english, i'am not native speaker ;-)
--
sincerely
Mike Schubert
_
|_| Mike Schubert Tel.: ++49-351-3 18 09 15
| |__ interface business GmbH Fax.: ++49-351-3 36 11 87
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Message has 1 Reply:
 | | Re: Just some questions...
|
| (...) Yes. Exactly the right point. The two different things to woory about, are the mA/Hr rateing of the battery (which tells you how long a particular current can be delivered), and the _internal resistance_ of the battery, which limits the (...) (25 years ago, 24-Feb-00, to lugnet.robotics.handyboard)
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