Subject:
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Re: How do I limit current effectively?
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 10 Aug 1998 02:12:16 GMT
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Original-From:
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Chuck McManis <CMCMANIS@FREEGATE.nomorespamCOM>
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Reply-To:
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CMCMANIS@FREEGATEavoidspam.COM
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Viewed:
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1688 times
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Why not use a 12ohm 10watt power resistor instead?
--Chuck
Joe Martin wrote:
>
> National Semiconductor make an "LM317" 3 terminal adjustable regulator which
> can easily be used as a current limiter. I am not sure if the schematic for
> this particular application is included with the Data sheets so I'll add it
> here.
>
> Current Limiter
>
> ________________ R1
> Vin |LM317|___/\/\/\_________Iout
> |_____|Vout |
> | |
> Vadj|____________|
>
> Iout = 1.25/R1 where I is the output amperage
>
> Joe Martin
>
> > -----Original Message-----
> > From: Phil [mailto:thehahns@netwurx.net]
> > Sent: Sunday, 9 August 1998 11:52
> > To: handyboard@media.mit.edu
> > Subject: How do I limit current effectively?
> >
> >
> > I have 2 large motors that draw about 2 amps. They are powered by
> > a battery
> > that's 6v at 2amp. How can I limit the motors so that they can
> > only draw 1/2
> > amp?????
> >
> > I know on my first robot (ahh, fine memories of burning resistors), I just
> > made a bank of resistors, but that got extremely hot and melted the nearby
> > electrical tape and even softened the LEGO piece it was on. What method
> > would be better?
> >
> > thanks!
> > phil
> > thehahns@netwurx.net
> >
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Message has 1 Reply:
Message is in Reply To:
 | | RE: How do I limit current effectively?
|
| National Semiconductor make an "LM317" 3 terminal adjustable regulator which can easily be used as a current limiter. I am not sure if the schematic for this particular application is included with the Data sheets so I'll add it here. Current (...) (26 years ago, 9-Aug-98, to lugnet.robotics.handyboard)
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