2708 EPROM progreammer - old magazines designs

[Chuck Guzis]

On 27 Mar 2007 at 18:22, Dave McGuire wrote:

>    It would be near-trivial to adapt the original design to be driven  
> by a microcontroller, by the way.

As I recall, the programming algorithm was very simple and brute 
force (fixed number of hits to get a 0).  IIRC, there were later 
programmers that applied a little intelligence to the operation.

One could easily build a programmer with little more than a counter 
and a few gates and a control transistor for Vpp.  The biggest 
annoyance it seems, to me is the need for several supply voltages in 
addition to Vpp.

Cheers,
Chuck