From: TA2 CNU (ta4cnu@hotmail.com)
Date: Thu May 01 2003 - 04:16:36 PDT
two or more 78XX or 79XX can be used in parallel, if the outputs are
connected to a terminal with a i.e. 0.2 Ohm 5Watts resitor; more adviced to
use power transistors after the unit... then it gets complicated...
ta2cce
>From: David Cole <DavidCole@tk7.net>
>To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
>Subject: Re: [MV] 6volts from 12 or 12v from 24 volts
>Date: Wed, 30 Apr 2003 23:16:08 -0500
>
>I've used those before but in a controlled situation - ie. soldered into a
>PC board, feeding some ICs, etc. How do they standup to overloads, and
>electrical noise. If they are rated for 1 amp, do they open circuit at 2
>amps, etc?
>
>Dave
>
>On Wed, 30 Apr 2003 10:37:16 -0700 (PDT), w7ls <w7ls@blarg.net> wrote:
>
>>Yes, those will work. They are available in higher power packages, under
>>different numbers. If you draw more juice through them for more lights
>>or whatever, they will give off more heat, so a heatsink is a must. See
>>Digikey.com, Jameco.com, Bgmicro.com, or if you're really desperate,
>>Radio Shack. Jim
>>
>>"TA2 CNU" <ta4cnu@hotmail.com> wrote:
>>
>>>LM 78XX (xx= 06 for 6 volts, 12 for 12 volts)(negative ground)
>>>
>>>a simple transistor like chip can be used for getting 6 volts from 12
>>>volts or 24 volts and 12 volts from 24 volts; but up to 1/2 amps. A
>>>decent cooling fin will be needed...! (will cut out in case it gets too
>>>hot).
>>>
>>>this is a three legged item :
>>>left leg + volts in,
>>>mid leg - gronund,
>>>right leg + volts out.
>>>
>>>also:
>>>LM 79xx (xx= 06 for 6 volts, 12 for 12 volts)(positive ground)
>>>
>>>
>>>
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>>
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>
>
>
>--
>Dave
>
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