The HP 34E Ir with PANAMATIK ACT

[PANAMATIK]

(09-25-2015 07:58 AM)Harald Wrote:  

(09-24-2015 11:42 PM)PANAMATIK Wrote:  If contacting VCC first, the ACT will not be damaged, but appears to be damaged, because it never enters the boot loader.

Well, while the ACT wasn't physically damaged, on mine I managed to erase the bootloader by not having the order of the connections right.

I'm not sure whether you managed to erase the boot loader, because I forgot to test it, when I reprogrammed your ACT. The boot loader protects itself and normally cannot be erased. If the LED flashes only very short at power up, then the boot loader is still present but immediately starts the calculator each time because of the wrong order power up sequence. Only if the calculator doesn't start up any more then something has been erased.

IR printing:

Well, you are right, placing it in the middle by just drilling two small 0.8 -1 mm holes is still the most easy and minimal invasive way to install the printing diode. Nevertheless your placement looks industrially perfect and is a second alternative.

Bernhard