Just a note on that circuit with a Zener, Fig. 6, AN522 :

- The 33k resistor feeding the Zener diode is TOO high !
  I have used a resistor below 100 Ohms on that.



On 23 Aug 2001, at 8:31, Lawrence Lile wrote:

> Oh yeah.  I've used a simple circuit that is just a PNP transistor and 3
> resistors.  It's outlined in APP Note AN522 on the last page.  It's gone
> into several hundred thousand steam irons now, without any reported trouble.
> Should cost you about US$0.03 in volume.
>
> -- Lawrence Lile
>
>
> ----- Original Message -----
> From: "questuk" <questuk1@HOTMAIL.COM>
> To: <PICLIST@MITVMA.MIT.EDU>
> Sent: Wednesday, August 22, 2001 1:29 PM
> Subject: [PIC]: Cheap brown out circuit anyone?
>
>
>   Does any one have a brown out circuit for MCLR input, that is cheap and
> 100% reliable, I know you can buy dedicated chips and I may go this way, but has
> anyone come up with a simple cost effective answer?
>
> Thanks Gary
>
> --
> http://www.piclist.com hint: The PICList is archived three different
> ways.  See http://www.piclist.com/#archives for details.
>


---
Marcelo Puhl
mark@catolico.com.br
http://py3ss.cjb.net

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