> -----Original Message----- > From: pic microcontroller discussion list > [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Tony Harris > Sent: Monday, 6 January 2003 7:20 AM > To: PICLIST@MITVMA.MIT.EDU > Subject: Re: PCB exposure/developing timing? > > > Good news!! > > I've had more success!!!! Albiet after wasting a few more cuts > of material > ;) > > I exposed a board for 8 minutes under my light. > > Developed in my weaker mix of developer (known strength level) > > Etched it. > > Best board yet. > > Flaws: Glad it is working :o) > 1) Seems I didn't let it sit *quite* long enough in the developer - there > are some small streaky areas of copper, really small - mostly right around > the traces or pads, but nothing affecting continuity of the rest of the > board Are you sure the coating was not damaged in these areas, and that nothing brushed over the coating in the developer tank (I made the mistake once of using a brush lol) > 2) One of my traces is near open - it is still connected enough > to generate > tone with my tester, but I will probably have to do a wash over > of solder to > make sure of a solid trace. > > Thanks again to all that helped me out here - I really appreciate it. I > think I am beginning to get the hang of it - I have found that I hate my > laser printer when it comes to printing on transparencies, and am going to > have to get transparency film for my Pictrography to print out my stuff > normally. I would try tracing paper in the laser printer first. My Brother HL1440 works well in 600 x 600 mode for my surface mount PCB's, and I still have the option of going up to 1200 X 600 (although this slows the print speed down too much) Regards, Kat. --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.435 / Virus Database: 244 - Release Date: 30/12/2002 -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body