#Hp 41 rpn scientific calculator batteries serial number#

The DM-15L has a serial number on the case. The case is super strong, has the same dimensions as the original and weighs The keyboard is better than the one of the credit card sized editions. That calculator is really the best looking HP-15C clone that I have seen to thisĭate. produces since Oct 2015 a new model called DM-15L. Onto the end of a pencil give the best results. Those rubber eraser tips that you can put If you have big fingers then you have to use a pencil with a soft rubber eraser and type with The keyboard could however be improved a lot. The calculator is roughly the size of a credit card. I like the fact that the color scheme follows the original hp15c.

#Hp 41 rpn scientific calculator batteries software#

It has therefore, as opposed to the HP15c-LE, no software bugs. The hardware is designed with firmware updates in mind. It's emulating the original Voyager processor on new hardware and runs runs original HP15c firmware. The HP-15c by (previously known as produces a hp15c compatible calculator. I have investigated the HP15c-le power and battery problems and written about them at

#Hp 41 rpn scientific calculator batteries update#

They have not provided a firmware update until a year later and I don't think they will. It's a bit unfortunate that the HP company of today is not any more the company that took pride in producing high quality measurement equipment and calculators. There is no need to take the batteries out for testing. The non working low battery indicator is pretty bad too but you can just use a voltmeter and test the batteries once in a while as described in my Is the fact that the PSE (pause) function can only be called once per programĮxecution. The list of faults of the HP15c-LE might look long list but the only real problem Up side is the advantage that the 15c-LE runs faster than the original 15c and it has the same good quality keyboard with an excellent 'click'.

#Hp 41 rpn scientific calculator batteries pdf#

On the down side are a number of firmware faults:, list of 15c LE bugs ( local pdf copy) but on the

It does not only look similar to the original.

The HP-15c LE (30 year anniversary edition)įor several month a petition was circulating on the internet to bring back the hp15c and it seems HP took notice and produced at the end of 2011 It's interessting that this calculator is '1 * π inch' high and 'Φ * π inch' wide (where Φ=1.61803.=(1+sqrt(5))/2 prounouce: phi, Φ is also known as the 'golden ratio', π=3.141. You will never use another calculator once you get used to its logic and the HP bevelled keys with this rotate-and-click effect. There are others calculators which are more powerful and faster but out of all the calculators I have I am mostly using this one. I am using it a lotīut it is still as good as new. I bought my hp15c in 1988 and it was my first RPN calculator. This calculator was introduced by HP in the summer of 1982. Originally I did not collect RPN calculators. My collection of HP15c pocket calculators Elvis Pfutzenreuter: has a number of apps and calculators including a web based HP-15c emulator.Torsten Manz wrote the best desktop version of the HP-15c.You can resize the window if you want to see the registers. Greg wrote a very authentic javascript based HP-15c.

#Hp 41 rpn scientific calculator batteries mac#

He has versions for Windows and Mac as well as a java swing version that can be used under linux (run: java -jar HP15C.jar). Web browsers and they look and work like authentic HP calculators. While my calculators work withĪny old browser (pre 2010) you can find now calculators written for more modern Usable calculator in Javascript and I developed gsrpn. March 2008 I decided that it must be possible to write a more I always found my self looking for a real HP pocketĬalculator when I had to do some calculations. In a while but it never really felt like a real HP pocketĬalculator. I did not find one so I wrote one my self. Independent of the operating system on any computer out there. Table I have been looking for a good calculator that just runs Now that PCs and Laptops are one every office I have been using HP RPN calculators since the beginning of my Online Javascript implementations and computer desktop versions of RPN calculators Have however a look at this interessting experiment that compares calculators with RPN and algebraic notation. Telling a student 'Just type it in as you find it in the textbook' is easier than explaining how RPN The algebraic notation as used by most calculators LOOKS simpler. Understood the logic and used them for a while you would never RPN calculators are not so common because it takes a bit of