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Old 12-08-2007, 10:08 AM
Grant Stockly Grant Stockly is offline
Join Date: Jan 2005
Posts: 447
Default New Scanner

I just bought an expensive toy. From now on I am going to scan all boards at 3200dpi 48bit color to preserve the board data. This will be like the tradition of scanning manuals, but on steroids. I'm not sure how to share the raw scans since they are 3GB for each side of an S-100 card. Probably you'd have to mail me an external hard drive.

I have quite a few bare boards available to scan, but most of them have been soldered on. I may try asking Mardy if he would be willing to loan me some of his bare boards for scanning. I'm excited about the possibility of preserving this data!

How many of you would be interested in downloading or in some way getting PCB scans?

The specs of a 3200dpi 24bit color jpeg at 7 of 12 quality image of a S-100 PCB are:
~32938x18045 pixels

But I'm having trouble finding programs that can handle a 32,000+ pixel wide jpeg...

Here are some samples of a 3200dpi 24bit 7 of 12 jpeg...

Most browsers "shrink" the image to fit the window. Make sure you zoom in to view them at 100%!

Here is a sample of the bubbly silkscreen.

These pads are .1" apart...

Flux left on the board. Ugly!
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Old 12-08-2007, 01:07 PM
mardy mardy is offline
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Join Date: Dec 2007
Posts: 14

This might be a good candidate for BitTorrent P2P file sharing. I know most people immediately think of P2P in the context of people sharing illegal copies of music, but it is becoming a very popular mechanism for sharing large bodies of legitimate technical data. Most of the Linux distributions use it now for publishing their CD images. Especially the DVD images.

It would take a little bit of work to initially set up, but from there, the bandwidth and storage burden is then shared by this community.
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Old 12-08-2007, 07:15 PM
Grant Stockly Grant Stockly is offline
Join Date: Jan 2005
Posts: 447

I couldn't help it. I had to scan a 1702A 256byte EPROM.

This one was done at 6400dpi, really 3200dpi along the scanner array and 6400dpi in the scanning direction. So there is some interpolation in the image. Still a pretty impressive picture for a scanner.
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Old 01-06-2008, 05:45 AM
Forbin376 Forbin376 is offline
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Join Date: Jan 2008
Location: Oregon
Posts: 14
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Default Wow!

You can almost read the bits....<grin>. I'll start looking through what I have and see what may be of intrest to the community here.
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Old 01-08-2008, 08:39 PM
Just Bob! Just Bob! is offline
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Join Date: Dec 2006
Location: I am currently in Clinton Township Michigan, which is a little North & West of the Motor City
Posts: 4
Default Really, really, really Big Scans!

Grant, single sided, single layered recordable DVD's hold 4.7GB!

Keep your data bits in sequence, and your ribbons in the guides..."
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