NEW: HP 15C Collectors Edition

[dmh]

Thanks for the detailed information and photos Eric !

A previous post mentioned a button was still used, which line has the button connected?

It appears the wiring is direct and not going through the chip at all now, is that correct?

So if you can roll your own pogo type connector could you could make a new cable the same way?

So, where do I get the firmware (original and patched) and what software is now required?

Thanks again.

(11-02-2023 04:15 AM)Eric Rechlin Wrote:  

(11-02-2023 01:42 AM)dmh Wrote:  Has the new cable been documented anywhere? How to build from scratch or modify the LE cable?

If you are willing to permanently sacrifice an LE (20b/30b) cable, here are the steps:

1. Open the section with buttons (two #0 Phillips screws), desolder the serial cable, slide off the strain relief to reuse, cut a USB cable, slide the strain relief on the USB cable, and solder the USB cable on. Green from USB goes to TXD, white to RXD, and black to GND2. Red is unused.