HP97 The journey begins

[Harald]

(05-01-2020 03:47 AM)teenix Wrote:  Hi all,

I received some circuit boards the other day so international postage is still working to a degree :-)

I decided it should be ok to submit the HP-97 replacement CPU prototype designs for manufacture, of which two are required, and hopefully I'll have them in a few weeks to begin populating and testing - exciting.

The 64 pin TQFP chip (pin spacing 0.5mm) might be a challenge to solder but I think it should turn out similar to the 44 pin chips used in the other boards which are quite easy.

That sounds grerat! I am tempted to take appart my working 97. I probably wont do it though

(05-01-2020 03:47 AM)teenix Wrote:  Edit: Some other circuit boards came today for another HP project I've been playing with which uses the same PIC, and it looks like these chips can be soldered with simple tools from home :-)

cheers

Tony

Now I am intrigued. What is this other project you are talking about?

Cheers,
Harald