Who is stll making RPN calculators, that is besides the HP-12?
2017年4月28日 · Mar 3, 2021. #15. 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. Not quite what I am looking for.
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.
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.
Using shift registers to implement a stack | All About Circuits
2014年11月19日 · Maybe I should explain: this stack circuit will later be part of a calculator ("HP" type, i.e. calculators that use "Reverse Polish notation") that should have the ability to make some arithmetic and logic operations on the first cell on the stack and a 4bit number that is given in another input (not connected to the numbers in the shift ...
Reverse a formula - All About Circuits
2019年6月21日 · we want X as a function of Y, written as. X = f (Y) In order to create this new formula, we go back to the rules of basic arithmetic. The initial equation is: Y = ( (A / B) * C ) / X. We want to move Y to the right hand side of the equal sign, and …
Reverse engineering electric arc lighter | All About Circuits
2024年2月22日 · A 10k ohm resistor connects MOSFET pin 2 to MOSFET pin 3 and battery ground. Battery positive passes through to the (+ marked) terminal of the transformer. This appears to be a simple flyback circuit. Next, I wanted to see if I could make my own driver circuit and bypass the marked-but-still-unknown-quality components.
calculate saturation current of ferrite pot core - All About Circuits
2014年8月26日 · So I assume substituting 2*pi*r with the core length will work. aproximately with a P-core, I do: NI=B_S*l_e/mu = 0.42 T * 0.0259 m / (192 * 4E-7 * pi) = 45 A. I don't believe 45 A. I have a 26/16 P-core (without specs, 26 mm diameter, 16 mm high (per set with 2 halves)) with saturation current of 3.5 A.
Design of FIR filters by Windowing. | All About Circuits
2024年8月28日 · Hi, For a real quick short suggestion, you can find a lot more info on this in a book on Digital Filter Design
Ampere-Turns calculation - All About Circuits
2023年12月15日 · The inductance is not that meaningful if there is a constant DC current through the coil. V/L=dI/dt, so dI/dt is zero for a constant DC current, so that the voltage across the inductance will also be zero. The coil resistance will dominate, so the voltage across the coil will be IR, where R is the DC resistance.
Why is the current always measured negative in LTSpice?
655. Jul 20, 2010. #2. It uses the same convention for sources and loads, which is that + power is absorbing and - power is delivering. Since the voltage is positive the current is negative to give you a negative power. If you switched it up for loads and sources you'd just get confused by sources that are really sinking and such...