HP97 The journey begins

[teenix]

(10-21-2021 03:44 PM)TomC Wrote:  Tony:

Don't be too 'daunted' - a 'Large Scale Integrated Circuit' of the 1970s may be quite minimal in the 21st century!

TomC

OK, Just a little bit then ;-)

I've cobbled together a circuit for the read/write and if it does what I hope then it should be a single chip solution. This will be good as there is one taxing problem, there is not much room where the original sense chip resides and this limitation may kill off any chance of a plug in replacement. There are also a couple of sense chip types and I'm not sure of the differences.

I need some odd value parts to experiment with the circuit, so I will try to put something together when I can.

The worlds longest lockdown here has begun to lift today, so I can start to get some freedom :-)

cheers

Tony