Re: Optical Scanners for Music Box Disks
By Will Dahlgren
A subscriber writes about possible diodes for an optical scanner:
> I had also spoken with a photodiode company here in Texas and they
> recommended something called the "pill" diodes that were used to read
> the old computer cards we used in school...>>
Be aware these guys are very small. They are a small cylinder about .059" dia. x .090" long. Most of the cylinder is one contact (a brass sleeve) and the diode end has two small tabs about .015" square (these stick out at a righr angle from the cylinder. Obviously a custom PCB will be required. I have tried hand soldering several of these with no sucess. Probably solder paste with infrared heating would work.
I have no idea if these are still available. They cost about $120/100 seven years ago.
Anyway, if anyone is still interested in this item, I have a few - just e-mail me your address and I will drop a couple in the mail.
Will Dahlgren
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(Message sent Sun 6 Oct 1996, 15:16:10 GMT, from time zone GMT-0400.) |
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