Perfect! Thanks all! ----- Original Message ----- From: "Dave VanHorn" To: Sent: Monday, May 12, 2003 12:52 PM Subject: Re: [EE] Good way to detect phoneline. > At 05:39 PM 5/12/2003 +0200, dr. Imre Bartfai wrote: > >Hello, > > > >use a GOOD opto-coupler (I mean that with high CTRR, e. g. LTV817B), and > >amplify the output. > > I don't remember the part number we used, but I think the CTRR was > something like 2000. > Probably a darlington. > NOT a fast part by any means, but we didn't need fast. > > -- > http://www.piclist.com hint: PICList Posts must start with ONE topic: > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.478 / Virus Database: 275 - Release Date: 06/05/03 -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads