lm317 regulator
I am using lm313 to drive the following
BASIC stamp OEM, lt1298, NE555 Timer, Nand Gate, Frequency to voltage
converter, Interval timer.
I am feeding the the regulator from a nine volt battery and it is producing
5.2 volts. The I.C is getting warm. It is not heat sinked.
Is it normal for the I.C to get warm or is it that some thig is wrong?
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BASIC stamp OEM, lt1298, NE555 Timer, Nand Gate, Frequency to voltage
converter, Interval timer.
I am feeding the the regulator from a nine volt battery and it is producing
5.2 volts. The I.C is getting warm. It is not heat sinked.
Is it normal for the I.C to get warm or is it that some thig is wrong?
________________________________________________________________________
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com
Comments
will last very long
is the lm313 a 5 volt reg - if it is I would worry why it is 5.2v rather
than 5.02
richard
Original Message
From: fernando hood <hoodey@h...>
To: <basicstamps@egroups.com>
Sent: Friday, June 30, 2000 10:56 AM
Subject: Re: [noparse][[/noparse]basicstamps]lm317 regulator
>
> I am using lm313 to drive the following
> BASIC stamp OEM, lt1298, NE555 Timer, Nand Gate, Frequency to voltage
> converter, Interval timer.
>
> I am feeding the the regulator from a nine volt battery and it is
producing
> 5.2 volts. The I.C is getting warm. It is not heat sinked.
> Is it normal for the I.C to get warm or is it that some thig is wrong?
>
> ________________________________________________________________________
> Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com
>
>
>
>
>
voltage as heat like a simple resistor. It is built-in with temperature
protection. Difference from input voltage - output voltage will be
transformed in heat.This is not efficient. The 9 volt battery will
quickly be empty.
Switching regulators (DC-DC converters) are more efficient, but more
complicated and expensive.
ACJacques
fernando hood wrote:
>
> I am using lm313 to drive the following
> BASIC stamp OEM, lt1298, NE555 Timer, Nand Gate, Frequency to voltage
> converter, Interval timer.
>
> I am feeding the the regulator from a nine volt battery and it is producing
> 5.2 volts. The I.C is getting warm. It is not heat sinked.
> Is it normal for the I.C to get warm or is it that some thig is wrong?
>
> ________________________________________________________________________
> Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com
output set by external resistor?
If so, you can make any voltage you want, up to nearly the Vin.
Original Message
From: fernando hood [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=eszEClNdsHlm864sxvdmb97vnxSFkKV4689VxbAjbsl8DbLKApPldTrMz563TarKS1HF2PhNkVhBAFoaTg]hoodey@h...[/url
Sent: Friday, June 30, 2000 11:57 AM
To: basicstamps@egroups.com
Subject: Re: [noparse][[/noparse]basicstamps]lm317 regulator
I am using lm313 to drive the following
BASIC stamp OEM, lt1298, NE555 Timer, Nand Gate, Frequency to
voltage
converter, Interval timer.
I am feeding the the regulator from a nine volt battery and it
is producing
5.2 volts. The I.C is getting warm. It is not heat sinked.
Is it normal for the I.C to get warm or is it that some thig is
wrong?
_______________________________________________________________
_________
Get Your Private, Free E-mail from MSN Hotmail at
http://www.hotmail.com
it to the IC's specs..
>From: "A.C.Jacques" <acjacques@i...>
>Reply-To: basicstamps@egroups.com
>To: basicstamps@egroups.com
>Subject: Re: [noparse][[/noparse]basicstamps]lm317 regulator
>Date: Fri, 30 Jun 2000 16:19:29 -0300
>
>Linear regualtors like 78XX and LM317 will dissipate exceding
>voltage as heat like a simple resistor. It is built-in with temperature
>protection. Difference from input voltage - output voltage will be
>transformed in heat.This is not efficient. The 9 volt battery will
>quickly be empty.
>Switching regulators (DC-DC converters) are more efficient, but more
>complicated and expensive.
>
>ACJacques
>
>
>fernando hood wrote:
> >
> > I am using lm313 to drive the following
> > BASIC stamp OEM, lt1298, NE555 Timer, Nand Gate, Frequency to voltage
> > converter, Interval timer.
> >
> > I am feeding the the regulator from a nine volt battery and it is
>producing
> > 5.2 volts. The I.C is getting warm. It is not heat sinked.
> > Is it normal for the I.C to get warm or is it that some thig is wrong?
> >
> > ________________________________________________________________________
> > Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com
>
>
>
>
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