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Detron's Calculator Experience, or even more proof I am a nerd 6636

Absolutely No Life Club Posts: 7,657 Tool Carrying Linux User
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #330 on: April 07, 2019, 08:21:27 PM »
I prefer scientific calculators to financial ones, but I do love using the Time Value of Money (TVM) calculations to do mortgage estimates and see how changing the variables effect the solution.
the HP 12C is a great calculator, the the HP 10bII+ has quite a few more functions.




If I can help, let me know 
No Life Club Posts: 1,902
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #331 on: April 07, 2019, 09:32:49 PM »
Nice one Detron! Nothing beats a financial HP calculator.  :like:

I just with those PMT values were lower when calculating TVM values.  :facepalm:
Absolutely No Life Club Posts: 7,657 Tool Carrying Linux User
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #332 on: April 07, 2019, 09:35:03 PM »
Nice one Detron! Nothing beats a financial HP calculator.  :like:

I just with those PMT values were lower when calculating TVM values.  :facepalm:

I wish this was RPN, but not the end of the world.

If I can help, let me know 
Absolutely No Life Club Posts: 7,657 Tool Carrying Linux User
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #333 on: April 17, 2019, 09:06:05 PM »
I was very excited to get this one in the collection.  nice to have the box and all paperwork.

an HP 28S.















this serial number indicates that this particular calculator was made in 1990 (around the 49th week)





the HP 28S was released 1 year after the 28C.  the 28C had only 2k or RAM which was unable to allow the calculator to actually function properly.  they updated the RAM to 32k which was more than sufficient, even though in today's world it sounds tiny.

the 28C was the first calculator with a CAS (Computer Algebra System), but the 28S was the first one with a CAS and enough RAM to put in decent size problems.
the clamshell design allowed for more keys including direct access to the alphabet keys.
this is an RPN calculator.

Original MSRP was $235  (over $500 in 2019 money)

the 28S does include a solver that allows you to enter equations with one or more variables, and solve for any variable.
« Last Edit: April 17, 2019, 09:24:54 PM by detron »

If I can help, let me know 
Absolutely No Life Club Posts: 7,657 Tool Carrying Linux User
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #334 on: April 17, 2019, 09:10:45 PM »
99 cent find

found this at a thrift store for 99 cents!



HP 10b.  a financial calculator that is actually pretty nice.  I really like the looks of this one

If I can help, let me know 
No Life Club Posts: 1,902
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #335 on: April 17, 2019, 09:11:44 PM »
Great one Detron! (28S) We’ll never see the likes of these again, so it’s great to appreciate what these represented 30 years ago...and that they still work today.  :like:
Absolutely No Life Club Posts: 7,657 Tool Carrying Linux User
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #336 on: April 17, 2019, 09:19:07 PM »
Great one Detron! (28S) We’ll never see the likes of these again, so it’s great to appreciate what these represented 30 years ago...and that they still work today.  :like:

it is an example of the power HP put into devices back when they made amazing calculators

If I can help, let me know 
Zombie Apprentice Posts: 13,427 Hidalgo, Castillo del Hook
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #337 on: April 17, 2019, 10:07:02 PM »
it is an example of the power HP put into devices back when they made amazing calculators
And today, they're still similar, performance-wise. :D

Hooked, like everyone else. ;)

All hail the hook!

Small knives can do what big knives do, just slower.

My 30 day pen challenge! Pretty(?) Pictures inside:
Official 30 Day Pen Challenge!
Absolutely No Life Club Posts: 7,657 Tool Carrying Linux User
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #338 on: April 19, 2019, 01:59:03 AM »
pickup all three of these at a single thrift store today







I paid $10 for all three

If I can help, let me know 
Absolutely No Life Club Posts: 7,657 Tool Carrying Linux User
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #339 on: April 19, 2019, 02:04:42 AM »
Got an HP 18C with Manual in the mail today.




If I can help, let me know 
Absolutely No Life Club Posts: 8,833 Man of Multiple MultiTool Manufacturers
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #340 on: April 19, 2019, 05:19:50 AM »
pickup all three of these at a single thrift store today







I paid $10 for all three

Awesome Panasonic and Canon.  :dd:

Those lighted displays always make me happy.  :)

Pontificating particularly pious positions pertaining to polymorphic paraphernalia. G-Man.
No Life Club Posts: 1,902
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #341 on: April 19, 2019, 09:16:55 AM »
Great finds detron. I wish there were thrift shops like you get in the US where I live.  :cheers:

VFD technology is quite amazing. The vacuum fluorescent display is effectively a tiny cathode ray tube like an old TV. You still see some around on control equipment, but largely replaced by LCD and OLED technology.  :tu:
Absolutely No Life Club Posts: 7,657 Tool Carrying Linux User
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #342 on: April 29, 2019, 03:26:06 AM »
for anyone who cares to watch presentations from the HHC (HP Handheld Computers) conferences from 2010 through 2018

https://www.youtube.com/user/hpcalcorg/videos

If I can help, let me know 
No Life Club Posts: 1,902
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #343 on: April 29, 2019, 07:40:18 AM »
Thanks Detron.  :tu:
Absolutely No Life Club Posts: 7,657 Tool Carrying Linux User
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #344 on: April 29, 2019, 01:44:16 PM »
Thanks Detron.  :tu:

I had no idea that this was a thing.  happy I stumbled upon it

If I can help, let me know 
Absolutely No Life Club Posts: 7,657 Tool Carrying Linux User
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #345 on: May 07, 2019, 04:25:31 PM »
Since I have 6 HP 12C calculators   :facepalm:

I seem to play with them a lot.  My version of a "Hello World" program for programmable calculators is Heron's Formula.
I decided to do this on my HP 12C for fun and a learning process of the keystroke programming.

the user stores the 3 sides of a triangle in the registers 1,2,3 and then presses R/S to calculate the area of that triangle.

the program is

f P/R
RCL 1
RCL 2
+
RCL 3
+
STO 5
2
/
STO 4
RCL 1
-
STO 7
RCL 4
RCL 2
-
STO 8
RCL 4
RCL 3
-
STO 9
RCL 8
X
RCL 7
X
RCL 4
X
g SQROOT
STO 6
g GTO 00
f P/R



after entering your sides in 1,2, and 3 and running the program, the area is displayed on the screen.
any of the following can be recalled and used as needed.

RCL 1 = side 1
RCL 2 = side 2
RCL 3 = side 3
RCL 4 = semi-perimeter
RCL 5 = perimeter
RCL 6 = area of the triangle
RCL 7 = semi-perimeter - side 1
RCL 8 = semi-perimeter - side 2
RCL 9 = semi-perimeter - side 3

I know this is not anything special, but it is enough to excite me and keep me playing with my wonderful calculators.

If I can help, let me know 
No Life Club Posts: 1,902
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #346 on: May 07, 2019, 05:36:55 PM »
Looks like a good program to try out - thanks Detron!  :like:
Absolutely No Life Club Posts: 7,657 Tool Carrying Linux User
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #347 on: May 07, 2019, 08:06:08 PM »
Looks like a good program to try out - thanks Detron!  :like:

thank you.

I am sure you know, but SQROOT means the symbol.  I was just too lazy to make the proper symbol for the write up.

I prefer Scientific over financial calculators, but man, the 12C is impressive!

If I can help, let me know 
Absolutely No Life Club Posts: 8,833 Man of Multiple MultiTool Manufacturers
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #348 on: May 08, 2019, 03:27:53 AM »
Since I have 6 HP 12C calculators   :facepalm:

I seem to play with them a lot.  My version of a "Hello World" program for programmable calculators is Heron's Formula.
I decided to do this on my HP 12C for fun and a learning process of the keystroke programming.

the user stores the 3 sides of a triangle in the registers 1,2,3 and then presses R/S to calculate the area of that triangle.

the program is

f P/R
RCL 1
RCL 2
+
RCL 3
+
STO 5
2
/
STO 4
RCL 1
-
STO 7
RCL 4
RCL 2
-
STO 8
RCL 4
RCL 3
-
STO 9
RCL 8
X
RCL 7
X
RCL 4
X
g
STO 6
g GTO 00
f P/R



after entering your sides in 1,2, and 3 and running the program, the area is displayed on the screen.
any of the following can be recalled and used as needed.

RCL 1 = side 1
RCL 2 = side 2
RCL 3 = side 3
RCL 4 = semi-perimeter
RCL 5 = perimeter
RCL 6 = area of the triangle
RCL 7 = semi-perimeter - side 1
RCL 8 = semi-perimeter - side 2
RCL 9 = semi-perimeter - side 3

I know this is not anything special, but it is enough to excite me and keep me playing with my wonderful calculators.

Very cool. Thanks for sharing that. :salute:

Hope you don't mind, but I √'ed it for you. :facepalm:
« Last Edit: May 08, 2019, 03:34:59 AM by gerleatherberman »

Pontificating particularly pious positions pertaining to polymorphic paraphernalia. G-Man.
Absolutely No Life Club Posts: 7,657 Tool Carrying Linux User
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #349 on: May 08, 2019, 06:18:30 AM »
Very cool. Thanks for sharing that. :salute:

Hope you don't mind, but I √'ed it for you. :facepalm:

I appreciate it actually.  thank you

If I can help, let me know 
Absolutely No Life Club Posts: 8,833 Man of Multiple MultiTool Manufacturers
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #350 on: May 08, 2019, 05:21:10 PM »
I appreciate it actually.  thank you
:cheers:

Pontificating particularly pious positions pertaining to polymorphic paraphernalia. G-Man.
Absolutely No Life Club Posts: 7,657 Tool Carrying Linux User
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #351 on: May 08, 2019, 06:09:41 PM »
One of my students gave me this last night








If I can help, let me know 
No Life Club Posts: 1,902
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #352 on: May 09, 2019, 08:20:16 AM »
Nice detron. Looks like an APF mark 40 calculator. Great gift.  :like:
Absolutely No Life Club Posts: 8,833 Man of Multiple MultiTool Manufacturers
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #353 on: May 09, 2019, 08:25:02 AM »
That is very nice! Gotta love a bright red display. :dd:

Pontificating particularly pious positions pertaining to polymorphic paraphernalia. G-Man.
Absolutely No Life Club Posts: 7,657 Tool Carrying Linux User
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #354 on: May 09, 2019, 02:04:55 PM »
Nice detron. Looks like an APF mark 40 calculator. Great gift.  :like:

thank you.  I was wondering what the "real" version was.  I had figured out the APF portion (who went bankrupt in 1983) but not the model number before being rebranded

If I can help, let me know 
Absolutely No Life Club Posts: 7,657 Tool Carrying Linux User
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #355 on: May 09, 2019, 02:08:02 PM »
That is very nice! Gotta love a bright red display. :dd:

it is pretty

If I can help, let me know 
No Life Club Posts: 1,902
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #356 on: May 09, 2019, 04:34:13 PM »
thank you.  I was wondering what the "real" version was.  I had figured out the APF portion (who went bankrupt in 1983) but not the model number before being rebranded

I think it was private label by a Japanese factory. A lot were using the white/blue key combo. You will need to take a look inside at the chips to allow further research. Possibly Canon or Sharp.

Absolutely No Life Club Posts: 7,657 Tool Carrying Linux User
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #357 on: May 09, 2019, 04:43:07 PM »
I think it was private label by a Japanese factory. A lot were using the white/blue key combo. You will need to take a look inside at the chips to allow further research. Possibly Canon or Sharp.

hmm,  I might open it and take some photos.  but it will be when I get done with my degree.  so little free time right now.

If I can help, let me know 
No Life Club Posts: 1,902
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #358 on: May 09, 2019, 04:50:06 PM »
 :tu: good priorities.  :tu:
Absolutely No Life Club Posts: 7,657 Tool Carrying Linux User
Re: Detron's Calculator Experience, or even more proof I am a nerd
« Reply #359 on: May 10, 2019, 01:32:03 AM »
:tu: good priorities.  :tu:

I try,  but is is soo hard when i have a full time job, teach a class once a week, have a family, etc, etc

If I can help, let me know 

 

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