Construct Your Personal HP41C | Hackaday


There was a time when engineers carried slide guidelines. Then there was a time after we all carried calculators. Certain, calculators are nonetheless round, however you’re extra possible to make use of your telephone. If you really want severe quantity crunching, you’ll flip to a full laptop. However there was that awkward time when calculators have been essential and computer systems have been very costly that calculators tried to be what we would have liked from full-blown computer systems. The HP41C was most likely the head of that development. When you’ve ever had one, you understand that could be a marvel of the day’s know-how with alphanumeric capabilities and 4 plug in ports for extra reminiscence or ROMs. It actually was slightly hand-held laptop. Didn’t have one? Don’t fear, you may now construct your individual. Actually, the HP emulator may even act like an HP15C or 16C, if you happen to choose.

You possibly can see the gadget in motion within the video beneath. As you would possibly anticipate, this model makes use of a through-hole ATMEGA328 and even at 8 MHz, the emulation is quicker than the unique calculator. The machine additionally has over double the reminiscence the unique calculator had together with a real-time clock built-in. The show can be backlit, one thing all of us wished within the authentic.

What we actually favored, although, was the 3D printed circumstances you may obtain for the calculators. You possibly can see that within the video, too. We have been slightly unhappy that the package is in an HP15-C like panorama orientation in contrast to the HP41’s portrait format. Then once more, the schematics are there so possibly somebody will lay out a pleasant HP41-specific board.

In fact, HP calculators used RPN, however if you happen to grew up with a slide rule that’s high-quality. For everybody else, it’s normally a little bit of a studying curve. Additionally, as nice because the HP41C was, it didn’t have binary or hex and even octal math until you used “artificial programming” and although we think about the emulators used can deal with artificial programming (kind of meeting language for the HP41C) it was by no means enjoyable to work on non-decimal issues with this machine. Nonetheless, what an awesome calculator and it’s enjoyable to see it reborn in fashionable type.

We’ve seen one other pretend HP41C that we expect is utilizing the identical emulation software program however required SMD soldering. We surprise if the KIM Uno or 1802UNO might be made to run on the identical {hardware}? Looks as if it could.


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