Strange ICs on eBay

ben bfranchuk at
Sun Jun 12 02:08:25 CDT 2016

On 6/11/2016 4:03 AM, Peter Corlett wrote:
> On Fri, Jun 10, 2016 at 09:16:37PM -0400, Ali Fahimi, M.D. wrote:
>> Just wondering if anyone knows what these chips are for/from/etc.
>> Interesting look to them. I would say EPROM but the magnifying window is weird...
> Those look like "starburst" displays:
> The window is indeed a magnifying lens. I ass-u-me that LED technology was
> still a bit naff back in the 1970s and it was more practical to optically
> enlarge the segments than make a chip with physically larger segments. This
> compromise produced an odd visual effect, which is likely why it's not done any
> more.
Oddly, Jamco seems to have have found a bunch of stock of 7 segment 
displays somewhere and is selling them.

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