Best, inexpensive H-Bridge IC for bs2

trend

I am looking to drive a motor with these specs:
the no-load current at 6VDC (59 rpm) is 270 ma.· At 24VDC (255 rpm) current is 480 ma.

So, I am not totally sure what the max mA the motor will draw.

I would need to run this motor in both directions (that is why I want a h-bridge vs just a NPN or PNP)

What do you'll recommend? does radioshack have anything? that would be preferable so I can pick one up tomorrow and play with it this weekend [noparse]:)[/noparse]

thanks for any suggestions
Lee

trend

Do all h bridges take PWM?
Because that is what i need

allanlane5

When you use an H-Bridge, if you then pulse the drive signals with PWM (Pulse-Width-Modulation) you get speed control. The H-Bridge lets you change the direction of the motor, the PWM lets you control speed. However, the BS2 PWM is more oriented toward a cheap D to A conversion than it is DC motor control. You'll probably need a PWM co-processor to off-load the motor speed control from the BS2.

See Al-Williams web-site.

trend

hmm.. Can anyone second that? I really would hate to add another IC (mainly.. because I don't know how or even know why).. but what I would hate more is needing one after I get my pcb made, and not having one...

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Chris Savage

Trend,

·· Allan is right, Al's chip may be what you need...Better to ake care of things now before you get too far into the project.· Think of it this way...As far as needing another chip, you still need the H-Bridge, so what's one more to simplify things?



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