Subject:
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Re: voltage regulator current rating
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 6 May 1996 14:03:48 GMT
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Original-From:
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Fred G. Martin <FREDM@MEDIAantispam.MIT.EDU>
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Viewed:
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1471 times
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> Does anyone know the current rating on the 5V voltage regulator located next
> to the power switch? I am using a bunch of IR sensors, and am supplying
> power to them via the +5 V bus, but my VR seems to be getting quite hot.
> The sensors draw around 500mA, which might cause a 500mA VR to get quite
> hot. Any input would be greatly appreciated. Thanks... -Zak
The rated total is 1 amp. The HB itself draws 100 to 200 mA? I'm not
sure, I haven't measured it exactly.
Since the HB's battery is 9.6v, and the output voltage of the
regulator is 5v, the thing drops 4.6v, and at 600 to 700 mA of current
that would be 3 to 4 watts of power dissipation (e.g., heat). This is
a lot for the thing to handle without an additional heat sink.
It will probably live, but I would attach a heat sink.
-Fred
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Message has 1 Reply:
Message is in Reply To:
 | | voltage regulator current rating
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| Does anyone know the current rating on the 5V voltage regulator located next to the power switch? I am using a bunch of IR sensors, and am supplying power to them via the +5 V bus, but my VR seems to be getting quite hot. The sensors draw around (...) (28 years ago, 4-May-96, to lugnet.robotics.handyboard)
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