Apr 28, 2017 · I recently trashed my HP-35S because of a very flaky keyboard. From looking around the internet it seems that the only Reverse Polish Notation (RPN) calculator still being manufactured is the HP-12 financial calculator. Not quite what I am looking for. Is this the end of RPN in engineering...

Mar 3, 2021 · I recently found NEW RPN CALCULATORS being made in Switzerland, based on various HP models, using ONLY RPN MODE, but with current HW, and updatable firmware and OS. The build quality is also great (IMHO, better than HP). Just posting this as a LOVER of RPN, and seeing people wanting to find new...

Oct 4, 2018 · Would you consider a virtual calculator? Here is a virtual HP-42S calculator that can be installed on a PC or a smartphone, that looks and works identically to the physical calculator. The graphics are remarkable, as it looks just like the real calculator, even the display. I'm a big fan of HP calculators and RPN, so this was a great replacement for …

Jul 18, 2009 · I patterned the program after the HP-42s calculator. I spent a fair bit of time coming up with the number display algorithms so that the calculator would display numbers the way I like to see them in a variety of formats. The calculator handles integers, fixed-bit integers, rational numbers, real numbers, complex numbers, and dates/times.

May 10, 2021 · The Windows calculator has lots of new features. I never use it except for the occasional hex-binary-decimal conversion, and it has octal too, When I want a calculator I almost always grab my old HP15C Just use the menu bar to choose the Programmer version.

May 8, 2017 · The calculator should be able to group numbers using brackets, perform additions and substractions, AND and OR operations. For example, an expression could be: 4 + 5 AND 6 + (2 AND 7 OR 1) - (4 AND 10) I decided to code it as a RPN calculator and I used Dijkstra's Shunting-yard algorithm to transform the infix expression into a postfix one.

May 30, 2013 · Using an HC12 with Cygwin and TerraTerm, I am designing a fixed point calculator. Being a little late to start I am seeking some solid help. The lab wants the format (-)x.x for entry and the result to be (-)xx.x This is an example for addition entry that will be of …

May 8, 2015 · The problem with specifying a transformer for that pump is that the locked-rotor = instantaneous start current inrush is about 10X the running current, so the transformer must be able to supply ~30A for a couple of cycles of the AC waveform.

Sep 11, 2016 · Hi Gang, I have a auto cat feeder.. it has buttons on it's little circuit board - kind like those in a calculator (see image below). Those buttons have a kind of contact pad which pushes down on to them etc - how does that work..? i.e. what are they sensing between the PCB contact patches -...

Feb 9, 2025 · In a solenoid containing plunger, how can we calculate the force exerted by magnetic filed to move the plunger, if solenoid is placed in external bobbin/case? Is there any rough calculation for this ?