At 02:51 PM 4/10/2003 -0700, BillW wrote:
>     It takes less that two minutes to ID all of the pins. All you need is
> a DC
>     power supply and a current limiting resistor.
>
>My initial thought was that this sounded like a TIL311 (hexadecimal display
>with internal logic.  But the missing pins are in the wrong place.)  The
>sort of tests being propose will NOT work on that sort of device (of course,
>"that sort of device" is pretty rare...)
>
>BillW

Actually, the proposed tests did work OK, once I got over the shame and
embarrassment of not realizing that I could do that BEFORE asking for help.
:-)    The device does not have a common anode (nor a common cathode) but
instead has THREE common anodes!  (Of course, these can easily be made into
a common anode).  The led itself, embedded (like unto a reporter) in the
chip is a tiny little thing, possibly having some historical value to
people who are interested in the development of 7-segment displays.  The
fellow who gave them to me said that he originally bought them from a
person named "Bill Godbout" (I am not sure if this was an actual person,
or  the name of a company) who got them surplus from somewhere.  At any
rate, I have gunned them out, and once again proclaim the value of Internet
communication (with all its warts).

John

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