Total Repair

[PANAMATIK]

(07-21-2017 09:19 AM)Harald Wrote:  

(07-16-2017 02:40 PM)PANAMATIK Wrote:  Yes, all woodstocks will be suitable. And when I think right, the same circuit can also be used for the spice series HP-31/32/33/34/37/38, I will think about having a layout version for the next generation led calculators. As already said it will be ready at july 51st.

Bernhard

What about a classic calculator that does all this? I would have to look into power consumption of the dispaly drivers, but I think this would be feasible. Your controller does have a DMA, doesn't it?
It should be possible to design a replacement PCB that requires no changes to the rest of the calculator.

Of course the Classic calculators and HP-67 can be included in the list of candidates. However no magnetic card reader supported.

AFAIK you have done already a replacement board for the classic calculators. However I would recommend the original display drivers to be removed, they are not necessary and consume too much power and would thwart the Low Power concept less than 0.2mA in Sleep Mode. Although your concept proposal would need less wires for doing the replacement.

Bernhard