So, why are they so expensive then?
>
>> I'm only 15... I had a few plans for a few things, but the only
problem is
>> that I need to find an EPROM programmer and some old chips. Any idea
where
>> to get one - cheap??
>
>You might get an old EPROM programmer at a Radio rally/hamfest. But
>they're often not that cheap. How about buildign one for your next
>project - to program standard EPROMs (2764s - 27512s, say) is not that
>hard. Basically you have to set up the address and data, take one of
the
>pins (Vpp) up to 12.5V (or 21V, or even 25V on older devices) and then
>apply a 50ms program pulse to another pin. And repeat for all the
>locations you want to program.
>
>When i built my first embedded control system I had to build an EPROM
>programmer first....
>
>-tony
>
>
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Received on Sat Sep 19 1998 - 19:30:54 BST