Re: 20Amp H-Bridge driving with AVR
From: Andras Tantos (andras_tantos_at_yahoo.com)
Date: 03/14/05
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Date: Mon, 14 Mar 2005 14:32:42 -0800
<Huaci> wrote in message
news:423436a9$0$22218$afc38c87@news.optusnet.com.au...
> I'm an electonic amateur enthusiast and I want to drive 20Amp 12-24v DC
> motors with a H-bridge controlled with an AVR.
>
> Basicly AVR will receive speed commands from RS232, and it will count
> quadrature encoder signals (I do not now how to do it fast yet) from an
> encoder attacehed to the motor shaft and it will generate ON-OFF signals
> for the H-bridge.
>
> Do you know any open source, open schematics project with the above
> functionality?
>
Hi!
I'm about to finish a project with almost the same specification (I spec'ed
it for 6..18V DC). SCH and PCB is available, but they contain some bugs I've
found after publishing it. Firmware with I2C and RS232 support and a
corrected SCH/PCB will soon follow. Note, that though the HW has support for
quadrature encoders, I'm using back-EMF at the moment to measure the speed:
easier and precise enough for my needs. Anyway, take a look:
http://h-storm.tantos.homedns.org/h-bridge.htm
Regards,
Andras Tantos
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