What a find! I ripped apart a dead tapeless measuring calculator and the circuit board had many gold contact and connectors on it so just for the heck of it I took a knife and scraped off some of the green shellac on the traces and found that they were gold instead of copper like most boards. And not just gold plated. I really dug into them deep and all they did was flatten out more. Now what is it worth?
New users can’t post pics on the forum so here is the address to my pics.
http://img406.imageshack.us/img406/6954/s4020362.jpg
http://img545.imageshack.us/img545/7387/s4020361.jpg
The board is only about 2.5 X 3 inches. In the first pic you can see where I scraped the green off just to the right of the IC. In the second pic I scraped it off on the top left corner.
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