I had not heard of the the EPROM bit, Please enlighten me. I have used a LED as a photodiode. John Ferrell 6241 Phillippi Rd Julian NC 27283 Phone: (336)685-9606 johnferrell@earthlink.net Dixie Competition Products NSRCA 479 AMA 4190 W8CCW "My Competition is Not My Enemy" ----- Original Message ----- From: "Marc Nicholas" To: Sent: Wednesday, July 09, 2003 3:28 PM Subject: Re: [EE]: Phototransistors (*holding my head in shame*) > Shades of using EPROMs as crude input devices ;-) > > > -marc > > On 9/7/03 15:10, "Steve Smith" wrote: > > > A more simple soulition than sawing the top off :- > > OC71 scrape the paint off and you have an OCP71 > > > > (maybe 30 years ago) > > > > Steve...... > > > > -----Original Message----- > > From: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU] On > > Behalf Of Peter L. Peres > > Sent: 09 July 2003 17:38 > > To: PICLIST@MITVMA.MIT.EDU > > Subject: Re: [EE]: Phototransistors (*holding my head in shame*) > > > > > >>>> If it had two pins it would be called a photo diode... > >>> > >>> 2-pin phototransistors were more common than 3-pin in my experience. > >> > >> I concur with that...I've only ever dealt with the 2-pin variety > >> before, which is why the 3-pin variety kinda had me wondering. > > > > Hehe. 3-pin phototransistors were the most common in hobbyist times because > > that's what you set if you carefully saw off the top of a metal can > > transistor like 2N2222 ;-) > > > > Peter > > > > -- > > http://www.piclist.com#nomail Going offline? Don't AutoReply us! email > > listserv@mitvma.mit.edu with SET PICList DIGEST in the body > > > > -- > > http://www.piclist.com#nomail Going offline? Don't AutoReply us! > > email listserv@mitvma.mit.edu with SET PICList DIGEST in the body > > > > > > > -------------------------------------------------- > Marc Nicholas Geekythings Inc. C/416.543.4896 > UNIX, Database, Security and Networking Consulting > > -- > http://www.piclist.com#nomail Going offline? Don't AutoReply us! > email listserv@mitvma.mit.edu with SET PICList DIGEST in the body > -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body