Total Repair

[PANAMATIK]

(06-24-2017 05:28 PM)Geir Isene Wrote:  This is pretty crazy :-)

Another idea: The RTC chip is not yet assembled on the HP-01 board, as seen in the image above. But this can be done, which will create a Woodstock calculator with integrated Real Time Clock. The On/Off switch has no function, because the calculator can be left On all the time, it could switch between the HP-25 and HP-01 firmware instead. Also the piezo buzzer can be attached for alarm.

This HP-21 will become a very special/crazy one.

Bernhard