Programming with the Radio Shack EC-4004

[Eddie W. Shore]

Does anyone have or had a Radio Shack EC-4004 calculator? It was an AOS calculator which programming size only had 38 steps? I go back in time using it for programming:

http://edspi31415.blogspot.com/2016/06/p...-4004.html

I got one two years ago.

Eddie

[Csaba Tizedes]

(06-24-2016 03:29 AM)Eddie W. Shore Wrote:  ...programming size only had 38 steps...

I placed my note, thanks for posting - I really like these "blind programming calcs"!

Csaba

[damaltor]

Actually, the EC-4004 is a radio shack labeled device made by casio, specifically a casio fx-3500p. I have one if i remember correctly.

Most (all?) radio shack calculators were made by casio that time, and actually were sold parallel to the casio devices. Apart from the print on the housing, the devices are completely identical and had no inner modifications.

more about the 3500p:
http://casio.ledudu.com/pockets.asp?type=248&lg=eng

[Hlib]

Radio
Shack, what is it? I live in "Mogombo.ua" and never heard about this.

[Massimo Gnerucci]

(06-27-2016 02:54 PM)Hlib Wrote:  Radio
Shack, what is it? I live in "Mogombo.ua" and never heard about this.

How can you possibly use a computer then?

[Hlib]

(06-27-2016 03:06 PM)Massimo Gnerucci Wrote:  

(06-27-2016 02:54 PM)Hlib Wrote:  Radio
Shack, what is it? I live in "Mogombo.ua" and never heard about this.

How can you possibly use a computer then?

Now I understand (sorry, I don't live in a civilized reservation).

[Csaba Tizedes]

(06-27-2016 12:25 PM)damaltor Wrote:  Actually, the EC-4004 is a radio shack labeled device made by casio, specifically a casio fx-3500p.

And 3600p is the same just the labels placed on the keys not above them.

BTW: As I wrote in my note in Eddie' blog my favourite is fx-50F, a really limited memory (29 steps) model. Really surprising, how many things fit into that few steps: I wrote little programs many months ago: a little secant method; simple Euler method to solve Clausius-Clapeyron equation; a tiny curve fitting program for Rosin-Rammler distribution; iterative solver for Darcy friction factor and many engineering tool just for fun during my work.

These limited capabilities give me the real beauty of programming.


Csaba

[damaltor]

You are right about the 3600p. It has a different housing though than the 3500 and the EC-4004.

Also, there is the fx-2700p:
http://casio.ledudu.com/pockets.asp?type=202&lg=eng
It is almost identical to the 3500p, but for example the two function keys on the left side of the keyboard are slightly different. It also has the 38 steps in 2 programs.

[xerxes]

A very interesting calculator with this limited style of keystroke programming is the FX-3900PV.
http://casio.ledudu.com/pockets.asp?type=417&lg=eng
It offers 300 steps in 4 areas, a nice alphanumeric program editor and higher speed.

[damaltor]

Yes, those were a nice series of devices (up to number 5500 if i remember correctly). i have all of them (yay) and like them very much. all of them are kind of hard to program though because even the ones with the tiny alphanumeric display only show an abbreviated word of max 4 characters or so, describing the current step. still better than blind programming though.

[klesl]

A similar device is Citizen SRP-75 which offers 128 steps in 4 modes - LRN1 to LRN4 with 4 programming commands - ENT, HLT and 2 inequalities
It also has some conversions and physical constants.