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 Robotics / RCX / NQC / 1458
1457  |  1459
Subject: 
Controlling larger motors from RCX ??
Newsgroups: 
lugnet.robotics, lugnet.robotics.rcx, lugnet.robotics.rcx.nqc
Date: 
Mon, 7 Oct 2002 16:37:13 GMT
Viewed: 
353 times
  
We need to control larger motors with a separate 12V
power supply, from the RCX outputs.  We would like to
'mirror' the RCX bipolar, pulse-width-modulated outputs
to a separate circuit with a larger H-bridge that is
(probably) electrically isolated from the RCX.

Can anyone point to an example of doing this? I betcha
someone has by now, but I didn't find much with my
Google search...

We can build some external electronics, etc.  but don't want
to reinvent the wheel (driver).

First thoughts are two opposite-connected optoisolators
with a series resistor to the RCX output.  But then, how
to drive an H-bridge from that??

We need to drive two electric-window motors that are 12V and
about 5 to 10 amps, for a tracked vehicle.

BTW, any recent sources for TRACKS would be appreciated!

--
Regards, Terry King ...In The Woods In Vermont
tking@waitsriver.k12.vt.us



Message has 2 Replies:
  RCX as programmable battery charger
 
I was looking at my 1 years old cell phone, its battery is deteriorationg so fast cause of a bad recharger. I wondered about building a "hardware" charger, but i never found a design without a IC with good features: without an IC its quite difficult (...) (22 years ago, 7-Oct-02, to lugnet.robotics)
  Re: Controlling larger motors from RCX ??
 
Terry, I'd like to have more details about your project. I wonder, wouldn't be easier if you use a PICMicro MCU? or maybe another controller family? Tell me more, maybe I can help. Best Regards, CarlosLuis Rendon M. "Terry King" <tking@together.net> (...) (22 years ago, 5-Dec-02, to lugnet.robotics, lugnet.robotics.rcx, lugnet.robotics.rcx.nqc)

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