I made some changes to MotorShieldV3 to make it better.

made several changes motor shield when found terrible design of official arduino motor shield, not have official project example.

here changes:   according sch.pdf
1.remove chip ic2, cd4077d  in schematic.
2.connect pin_2 , pin_3, called braker-a in schematic.
3.connect pin_11 , pin_13, called braker-b in schematic.


4.re-connect pwma pin10 of arduino board. on of board.
   cut existing line (pwma pin3)  using knife.
   re-connect pin10.
ok if dont want step.



then, pin label can changed :


i using in1,in2,in3,in4, ena, , enb original names of chip l298n.



finally, if want drive step-motor, official arduino example can used 2 little changes.

firstly, create stepper new pin ids (12,9,13,8).
then put ena , enb @ high status in setup() function.

oh,
better view in blog.
http://xpcao.blogspot.hk/2014/02/how-to-make-arduino-motor-shield-better.html

Arduino Forum > Using Arduino > Motors, Mechanics, and Power (Moderator: fabioc84) > I made some changes to MotorShieldV3 to make it better.

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