Hi,
I posted this under EE, but then found a big discussion from
12/2000 about the tamiya twin motor drives.  I still have the same
question, the FA-130 motors are rated 3v@800ma stalled.
So why can't I drive the twin motor gear box a pic and
a sn754410 chip with 4AA batteries ?
One note I did have it set to 58:1 ratio, I am going
to try 203:1 next.

Thanks in advance,
Kevin

>>Hi,
>>I am driving two small DC hobby motors in a gear box assembly,
>>that drives two tank tracks. I wanted to power the F628,
>>SN754410 and two motors all from the same 4AA batteries.
>>If I drive the two motors right off the 4 AA batteries,
>>the tank tracks are powerful and can drive over a thick
>>book.  However, when I power the pic/SN754410/2 motors,
>>the motors are barely able to turn the tracks ?
>>
>>In the F628, I have port A set as digital, and set ra1, and
>>ra0 high and low to turn on motor a, and follow the same for
>>ra2 and ra3, for motor b (through the SN754410 of course.)
>>The SN7554410 is just a 1 amp version of the L293D.
>>port b is set as output and all pins low.
>>
>>I quess I'm just looking for a sanity check, I can't believe
>>the F628 and H bridge chip are using up so much current
>>that the motors can't even turn the tank tracks ?
>>I have both enable pins on the h-bridge chip tied to the +5v
>>supply through a 10k resistor.
>>Any one familiar with these chips ?
>>Any thoughs on what's happening ?

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