HP-41 external big display. (just kidding... sort of)

[ThomasF]

(11-25-2024 12:15 AM)Diego Diaz Wrote:  Hooked it up to my CX (messy wiring is my friend... ;-) and "voilà!" huge characters for everyone to see.

Nice work and a nice display!

For anyone that might be interested, the Tulip board offers a easy way to extend the display.
In my prototype I added a much smaller display, hooked up via I2C, as shown in e.g. this post.
The display is not as nice as the big HP LCD as shown by Diego, but can show not only the main display but also all annunciators.
Or, the display commands could be forwarded to a PC, showing the display on a big monitor.
All this is done by emulating the 41 display in the Pico device by listening to the instruction on the bus and keep any kind of display updated.

Cheers,
Thomas