HP Classic replacement PCB - multi emulator

[Harald]

Tony (teenix) has already presented his "Multi Calculator" in another thread.
I really like his project, but I also like having real calculator hardware.
So I have designed a PCB that replaces the main PCB of a Classic calculator but retains the keyboard and display PCB. This is a 1:1 replacement and does not require any modification to the calculator, which means it is fully reversable.
The PCB has a mini USB connector for communication and update from the PC. You can optionally cut a whole into the battery compartment to access this connector by simply removing the battery pack rather than opening the calculator.

It will have all the same features as Tonys original, but will use the Classic display and keyboard hatdware.

Tony has very kindly put a lot of effort in to make his software compatible with my hardware. There are a few problems to solve yet, but I expect that will be done guite soon.

The price will be €80 plus shipping (I would expect that to be arround 8 Euros world wide and insured. The chunk of that is component cost, with a small fee for testing and assembly and another small amount that will go to Tony to compensate him for his time and effort on the software.

Cheers,
Harald