HP 15C Limited Edition Scientific Calculator
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- The classic HP 15c scientific calculator
- Simple, intelligent design. Advanced scientific features
- It has unique HP RPN
- It has portable, user-friendly layout
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Top Customer Reviews
Another reviewer mentioned receiving an error message after running the self-test. The procedure listed in the manual is correct for the original 15c, but was never updated. The self-test for the 15c LE can be performed as follows:
Turn the calc. off
Press and hold 'g' and 'ENTER'
While still holding down 'g' and 'ENTER' press the 'ON' key
Release 'ON', followed by 'g' and 'ENTER'
The test screen will display ' 1.L 2.C 3.H '
Press 1 to perform the LCD test
Press 2 to display the Copyright/Checksum message
Press 3 to perform the keyboard test
Press ON to exit the self-test.
If you're familiar with the 15C, you already know it has an almost perfect combination of engineering/scientific features coupled with extreme ease of use. Support for complex numbers, hyperbolic trig functions, combinatorics, matrices, and high-quality numerics is legendary. And this is implemented with all functions clearly visible on the keyboard itself -- no multi-level menu system to learn (and forget!). Programming is simple and direct. If you don't know all of this already, trust me, the 15C is all the scientific calculator you're ever likely to need. If you need anything more, you'll turn to your computer.
The first thing you will notice about the LE is how fast it is. It's so fast that when I was first trying it out, I felt like I might have pressed the wrong key. All the functions return a result virtually instantly, including the trig, log/exponential, and even functions which are noticeably slow on the original 15C like the factorial of a non-integer number. I haven't had a chance yet to explore all the features fully, but I tried the integrate and solve functions on a few simple polynomial, gaussian, and rational functions, and the results are consistent with HP's claim of a 100x speed improvement. It really is fast. Integrations which took several minutes on the original return in a couple of seconds on the LE. I compared the results side-by-side with my old 15C and saw no differences in output, right to the last decimal place. My tests are by no means extensive, but this thing sure acts like a 15C, with lightning in its veins.Read more ›
I give the original HP-15C about 10 stars: 5 stars for performance plus 5 stars for reliability. What 27 year-old electronic devices are you still using daily? The new one gets 4 stars. Mostly that's me nit-picking the keyboard feel. New users will probably think it's great, since they are used to the abysmal keyboards shipped with ordinary calculators. The display is actually better than the original, having a wider viewing range and better contrast. However, there is also the user's manual screw-up with the self-test. See the other reviews for a thorough discussion.
As a real plus, the calculator ships with a program that emulates an HP-15C on your computer screen. While I found software installation kwirky, it is great to finally have the '15 available for a quick calculation when I'm on my computer. I just leave it running in the task bar.
As a final negative- to Hewlett-Packard: Why did you stop at 10,000 units? This isn't enough to satisfy e-bay merchants. Now they have all been sold, and are being scalped at $200-300, and the original HP-15C's are still selling for $400. Why can't you keep this product on the market, just as you did with the HP-12C????
Other than that, it's advantages over many of its larger and more modern alternatives are its easy to read display (The seven segment LCD is limiting in what it can display, but its clarity when displaying numbers is a welcome respite from the tiny dot-matrix characters of the graphing calculators); its landscape form-factor along with the RPN data entry method in addition to its tactile keys makes it easy to quickly get the result you need (I cup it in my hands and press the keys with just my thumbs); Keystroke programming is simple and straight forward. As the manual states, it's simply a matter of recording repetitive keystrokes sandwiched between a label and a return.
Among the other features the 15C has that aren't typically found on other non-graphing calculators is: matrix operations, integration, complex number support, matrix operations with complex numbers and a built-in root solver.
Granted, if you have no interest in the RPN method of data entry then this might rank among the worst calculators one might purchase.
Of course, if it's powerful features you're looking for and you're willing to sacrifice ease-of-use and ultra-portability then one of the graphing calculators is probably what you want.
Lastly, I'd like to note that the manual is just a copy of the original from the 80's (and it's a good one), but it does create some problems. The hardware test shown in the back is incorrect -- it applies to old classic 15C. The correct test is the same one used on the current HP 12C which can be found below in other reviews.
P.S.: I wouldn't entertain paying this much for one as long as HP continues to sell them for far less.
Most Recent Customer Reviews
Bought one directly from HP. Died after less than 10 hours of use. A truly sad tribute to what was once a great company. My old HP15C still works after 26+ years. Read morePublished 4 months ago by LT
Thisis really a legendary calculator. I own and use the original one I purchased 30 years ago.. It's interesting to compare both of them simultaneously with the same program and... Read morePublished 5 months ago by Amazon Customer
Exactly what I expected and shipping/service was second to none.Published 11 months ago by Kevin Adam
Excellent Scientific Calculator. I lost the recent one, and needed a new.Published 17 months ago by Martin J. Sterndorff
I had one in college in the 1980's. I loved it. However, the HP quality that I expected was not there. The keys are mushier. Still, it works fine. Read morePublished 20 months ago by Robert Powell Jr.
Great calculator for less than $20 at iTunes store. Get virtual calculator for use on phone and tablet and save lots of money. Read morePublished 23 months ago by Yves