On Sat, Oct 31, 2020 at 5:02 AM Michail Wilson wrote:
Hello.
>
> You used a CD4051 where I was thinking of a 74595 shift register since it
> has tri-state (not knowing yet if that is required) or PCF8574.
>
> I spent nearly an hour searching your blog. E, it would be great if
> you had a
Mahdi,
Thanks, but looking to control a calculator, not replace it.
Dekatron42 (Martin),
Yes, that is the exact idea in theory; however, I don’t want to use ~12 SSRs.
Currently, I am looking to use an ESP8266 and 1 or 2 of PCF8574
Paolo,
Yes, that’s basically the idea. You use a VFD and I
Done :)
I have documented some parts on my blog
http://ik1zyw.blogspot.com/2016/09/olivetti-logos-262-pd-desk-calculator.html
. Navigate to more recent posts for the rest of the story.
After the Olivetti I tried tracing keyboard connections and voltages on
another calculator with Panaplex (maybe
Only 6 tubes Mahdi?? LOL.
World's most expensive modern calculator? Possibly looks great!!
On Fri, Oct 30, 2020 at 3:39 PM Mahdi Al Husseini
wrote:
> Not sure how relevant, but I created an RPN calculator using Dalibor’s
> tubes. Great little project. Link below:
>
>
Not sure how relevant, but I created an RPN calculator using Dalibor’s
tubes. Great little project. Link below:
https://mahdial-husseini.com/AOITA
On Fri, Oct 30, 2020 at 12:18 PM Michail Wilson wrote:
> I am thinking of a project to control a calculator.
>
>
>
> I have seen people pull tubes
I am thinking of a project to control a calculator.
I have seen people pull tubes from old calculators to make clocks, etc, but I
would like to put in an interface to make a clock which is controlled by a
circuit added.
Example…. Clear display and then ‘type’ in the numbers for the time. Or
