A few short videos shot with the camera/usb video capture setup I mentioned earlier:
http://www.fastbobs.com/bob/radio/video1.mpg Video 1 - Black & White inspection of a prototype power sensor. Low magnification http://www.fastbobs.com/bob/radio/video2.mpg Video 2 - Colour inspection of same sensor. Same magnification. About 2-3x http://www.fastbobs.com/bob/radio/video3.mpg Video 3 - Longer version of #2. Note lighting changes in 2nd half. http://www.fastbobs.com/bob/radio/video4.mpg Video 4 - Short, color, higher magnification http://www.fastbobs.com/bob/radio/video5.mpg Video 5 - Longest, highest magnification. Same probe as earlier shots. Note lighting changes as the light source is moved around showing shadows. On Mon, Jul 19, 2010 at 9:22 PM, Robert J Marinelli <b...@stanford.edu> wrote: > Hi Richard, > > Yes, used to feel that way - until acquiring a surplus dissecting (stereo) > microscope, now I actually *prefer* surface mount. Much easier to move > parts around, it's easy to apply paste & solder entire boards in a $50 > toaster oven, and access to all the latest parts. Hard to believe, but > really is easier once you can clearly see. For some nice tuturials, see the > sparkfun website, also the schmartboard website. Also, when I lay out > surface mount boards, they tend to be smaller overall, and so a bit lower > cost. > > Please do try with a low cost stereo microscope - it changes everything :) > > -Bob > > p.s. Finger size is no issue - tweezers work nicely. Oh and surface mount > resistors & caps are unbelievably low cost in cut tape, and super easy to > handle that way. Much better than loose parts IMO. > > On Jul 19, 2010, at 4:59 PM, Richard H McCorkle wrote: > >> The TS272CN is an acceptable substitute for the TS272ACN in the >> PICTIC II but as noted has a higher input offset voltage. This >> can be compensated for in the second stage by adjustment of >> the offset trimmer. I selected premium parts for temperature >> stability in the application. Sorry the manufacturers are >> making "human compatible" devices obsolete and only carrying >> over surface mount devices as they go Pb free for the EU >> market. Makes it difficult to keep up with what's available >> and harder for amateurs with fat fingers and poor eyesight >> like myself to build simple projects! >> >> Richard >> >> >>> Here we go again! >>> >>> The TS272ACN has just gone 'non-stocked' at Mouser. Will the TS272CN >>> degrade the performance? It looks like the difference between the two >>> is the TS272CN has a higher input offset voltage. >>> >>> Ed >>> >>> >>> _______________________________________________ >>> time-nuts mailing list -- time-nuts@febo.com >>> To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >>> >> >> >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.