Who is stll making RPN calculators, that is besides the HP-12?
2017年4月28日 · 2. Mar 3, 2021. #17. DickCappels said: 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.
NEW RPN CALCULATORS - All About Circuits
Joined Mar 3, 2021. 2. Mar 3, 2021. #1. 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 models.
RPN calculator using VHDL - All About Circuits
2017年5月8日 · 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.
Wake up Faded Display on HP 32S Calculator? - All About Circuits
2018年10月4日 · 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 my old HP-42S, whose keys sadly ...
Open source console-based RPN calculator | All About Circuits
2009年7月18日 · Hmmm, I feel a bit like I'm tooting my own horn by posting some of the things I've posted lately. But hopefully, they'll help someone save some time. If you like using an RPN calculator and don't mind working from a console window, you can download the hcpy calculator. It's written in the...
RPN Fixed point Calculator (HC12) - All About Circuits
2013年5月30日 · 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 …
dc voltage reading - ground vs negative | All About Circuits
Feb 3, 2018. #8. Everything is not referenced to chassis ground. The 24 VDC supply that runs the PLC may be isolated from ground. There is ground, earth and common primarily. There can be many commons. Speaking in general terms, you would need to be aware of signal grounds, shields, earth, commons, high current ground.
4060 timer calculation - All About Circuits
2014年12月25日 · The value of the resistor and capacitor connected to pins 9 & 10 is calculated by t (time)=2.2RC. Since the greatest division of the 4060 is 16384, if you multiply 30 minutes by 60 (seconds/min)=1800 seconds. The divide 1800/16384 we get .10986 seconds The oscillator time. Then .10986=2. 2R1uF. R=.10986/ (2. 2x1uf).
RPM to duty cycle conversion - All About Circuits
Mar 22, 2021. #12. If 100% PWM duty-cycle equals 550RPM then the simple way to model that is (RPM = %duty-cycle * 5.5) or (%duty-cycle = RPM / 5.5). Thus if the output of the PID is RPM then you run that through a gain of 1/5.5 to get %duty-cycle. If the PID parameters are set correctly, then the motor should smoothly accelerate to the desired ...
LTspice: efficiency calculation - All About Circuits
Nov 9, 2010. #2. It's covered in the LTSpice Help files, but basically... Your circuit must have: 1) Exactly ONE voltage source. 2) Exactly ONE current source set up as a load for the output. 3) One or more of Linear Technology's provided IC models (I haven't figured a way around this yet). 4) On "Edit Simulation Command", you must check the ...