H-Bridge protector

--- The REALLY hard way :) ----

       This circuit will virtually protect your POSITIVE triggered H-bridge from SMOKING due to 1,1 logic input. Connect the "IN A and IN B" to the Nv outputs & connect the "X,Y" to your transistor h-bridge inputs. Keep the control circuit at low frequencies (Nv nets are at low freq anyways :) ).

    This circuit was created due to lack of components in our area. I had to make an emulation for the 74xx139 chip.. But this circuit is POSITIVE triggered.. do take note!! whereas the 74xx139 is negative triggered...

    I know this circuit is simple.. but at least IT WORKS :)

SCHEMATICS

The basic circuit

Chip pinout

Truth Table

PHOTOS

N/A - I forgot WHERE I stashed the circuit... :)

VIDEOS :

Do I have to?? :)

Copyright © 2005 by Ralph R. Cañas. All Rights Reserved.

BEAM Patents by Mark W. Tilden.

Special thanks to: Solarbotics for giving me this web space (thanks Dave) , Mr. Mark Tilden (BEAM is nothing without you),

DONT GIVE UP!!! LET THAT ROBOT GO n WALK on ITS OWN :-)

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