maheshcet

ericgibbs

hi,
What sort of help are you asking for.....we need more details.

__________________
Eric
"Good enough is Perfect"

PIC tutorials:
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maheshcet

sorry forgot to tell u wht my prob is....
my question is wht's control A and Control B... wht should be the inputs to drve the motor;

bryan1

Eh maheshcet,
The L293 is obsolete and the TI SN754410ne has replaced it. Just google that ti part number and the datasheet explains everything and yes it is pin for pin compatible with the L293

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Wingmax

The general idea is to generate voltage/ states on 1Y, 2Y, 3Y and 4Y as follow:
1Y 2Y 3Y 4Y
-------------------
1 0 1 0
0 1 1 0
0 1 0 1
0 1 1 0

1 0 1 0 <---- repeat

Each row of state will make the motor turn one step.
for example, say you want to generate the first row of state, according to your diagram, control A and B shouild be logic 0. and so on....