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Just found MsKennedy MSK4200 H-bridge w/ internal PWM generation. I will probably go with a DSP->D/A Converter->H-bridge w/ PWM-> brushed DC motor configuration.

Thanks a lot, cswilson. This encoder interface chip is what I needed. But I still need to find the chip for PWM generation.

Thank you, Keith. Yes, PMD has several chips that can handle up to 4 axis per chip. But they seem to be overkills for my application. I just need some PWM generator which takes commands from the host DSP and provides PWM to H-bridges. Also, I need counters which can handle quadrature encoder...

I need to control 4 brushed DC motor with one single DSP (TMS320F2812). In addition to PWM generation, the DSP needs to process the feedback signals from 4 quadrature encoders. The problem is that one TMS320F2812 can only handle up to 2 motor/encoder pairs. I don't want to use a...

thanks a lot! I'll try them out.

Thank you so much, israelkk. Still having some problems meeting both the size & torque reqs: torque: >= 12 N.m overall length/width of housing: <= 1.5" haven't found any existing products.

I've been looking for small Miter gears (pitch dist. < 0.75", mounting dist. < 1.0") with gearbox housing for weeks. Checked with smallparts.com & sdp-si.com but they only have gears without housing. Anybody has suggestions on where to search for miniature miter gears with housing? Thanks a lot...