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<p>[QUOTE=&quot;-jeffB, post: 2566955, member: 27832&quot;]3D printers won&#039;t be able to produce convincing counterfeits for a long time, if ever, but they could <i>definitely</i> produce enlarged copies of coins. Producing something plate-sized would be pretty time-consuming and expensive, but it would be possible.</p><p><br /></p><p>I haven&#039;t followed it closely, but I know work is being done to develop tactile-sensing&nbsp; surfaces to let robots feel what they&#039;re touching. I also know that there are tactile displays, basically large arrays of pins that can be raised or lowered. I hadn&#039;t thought about combining the two as a &quot;Braille microscope&quot;, but I wonder...[/QUOTE]</p><p><br /></p>

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