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CHEAP [!!!] calculator

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SMath Studio is a great free math solver. Very similar syntax to Mathcad

There’s also GNU Octave which is open source with similar functionality to Matlab

On phone I’m also a fan of using a TI emulator

Also don’t forget Desmos for on the go function plotting
 
Muse said:
The 3 plastic ones I just got through Temu seem OK. Like the one I got before, the narrow bottom end is too narrow for my purposes, so I cut off about 1.5" of that to give a larger opening, about 1" diameter. Otherwise the opening at the bottom was about 1/2 the area. One of my main uses is filling canning jars with semi-thick simmering mixtures such as preserves and tomato sauces. The opening has to be large enough that the mixture will flow into steamed jars without coaxing. I made that adjustment on one of the new plastic funnels first thing this morning.
Click to expand...
you could have led with that. yeah you should be looking at canning related stores or sites. ball makes a plastic 8" very wide mouth and spout funnel specifically for canning. Got that short spout too so it doesn't get in the way of the preserves. I made some bluberry preserves last week using one of their 8" diameter plastic funnels.
 
dank69 said:
So...bottom line is...you paid $10 for a plastic funnel.
Click to expand...
Not exactly. For my $10 I got 3 of those funnels and 3 calculators. I had priced funnels elsewhere and if I'd gone with any of those all I'd have gotten for my ~10 bucks would be one funnel, not better than the ones I got. I'm a pretty shrewd customer.
 
A/// said:
you could have led with that. yeah you should be looking at canning related stores or sites. ball makes a plastic 8" very wide mouth and spout funnel specifically for canning. Got that short spout too so it doesn't get in the way of the preserves. I made some bluberry preserves last week using one of their 8" diameter plastic funnels.
Click to expand...
And one from a canning store would probably be guaranteed to be food safe, dunno so much about plastic funnels from Temu.
 
deadlyapp said,

"MRC clears your memory. M+ adds the number to memory, M- subtracts from memory.

Actually, MRC may be memory recall for this. CE/C would clear all / clear memory.

You can use the built in calculator in windows to see how the memory works - personally I've never once felt the need to use it."

Small correction I verified on a calc I have. The MRC key has two functions. Press once to RECALL memory contents. Press twice in succession to CLEAR the memory to Zero.
 
This thread got me playing the gx emulator. I dug out a cogo program I cowrote ~30 years, and I'm trying to remember how all the parts go together :^D I already have enough to use as a backup program in case my hardware calc dies on the job. It's very spartan, but it'll work in a pinch. I'll see if I'm motivated to extend it. The pro software I use eventually got good enough I didn't have to add anything. It also switched to assembly, so it made it more brittle, and got out of my competence zone for hacking on it, but I can use the old way as a backup program.
 
sliderule. Also, abacus.

You might also be able to rent an idiot savant to do calculations.

I got my first TI calc back in the 70's. Still have it and it's still very pretty. Of course, it's not an HP 12C. I just did a search and it seems HP still makes those

81Cqj-4hf5L.jpg
 
Charmonium said:
sliderule. Also, abacus.

You might also be able to rent an idiot savant to do calculations.

I got my first TI calc back in the 70's. Still have it and it's still very pretty. Of course, it's not an HP 12C. I just did a search and it seems HP still makes those

81Cqj-4hf5L.jpg
Click to expand...
I still have my Casio fx-78 10 DIGIT Scientific Calculator...

It always sits on my night stand. It's the smallest calculator I remember seeing. 2.1" x 3.6" x 0.2"

Bought it about 1980 at ASUC store in Berkeley. I asked the guy how long the battery would last. He said "2 years." I have never changed the battery. The LCD display is a bit weak but still readable. It has a side slider on--off switch, but auto-off too.

I had a relatively bulky calculator before getting the Casio, got it around 1975, it was before they got the miniaturization going. Of course it was a wonder. I took a numerical analysis math course at Cal about that time, so I understood how this stuff was done using polynomial series. Interestingly, I didn't recall during the course that mention was made of the newly developing market for hand calculators, but I realized after the course concluded that what I had studied was the key to their functionality, which was kinda neat.

3. How Does a Calculator Work?

This section explains how calculators and computers work out values of sine, cosine, tangent, etc.
www.intmath.com www.intmath.com
 
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