JOT scientific calculator

[Richard Berler]

$1 calculator at Dollar Tree. Has trig, hyp-trig, ln/log, y^x, unexpected: x root of y, conversions between rectangular and polar, deg.xxxx to degree,min,sec, basic stats, complex number (only -,+,*,/). Pretty remarkable for $1. Pocketable. Atrocious keyboard... horrid,horrid unit, yet remarkable what they can get into a $1 unit!

[Gerson W. Barbosa]

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horrid,horrid unit, yet remarkable what they can get into a $1 unit!

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Sold in bulks of 24, however.

http://www.dollartree.com/10-Digit-Scientific-Calculators/p300303/index.pro

[sjthomas]

But in the brick-and-mortar stores you can buy individual units.

[Eddie W. Shore]

I have one of those $1 store calculators. The keyboard is awful. The keys are rubbery.

[Richard Ottosen]

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Pocketable. Atrocious keyboard... horrid,horrid unit, yet remarkable what they can get into a $1 unit!

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And that is if the calculator works. Many don't work right out of the package. Before buying in a store you want to poke the keys through the package and at least verify that all of the display segments activate.

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I have one of those $1 store calculators. The keyboard is awful. The keys are rubbery.

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I have opened one up. The switches under the buttons are a membrane keyboard. The membrane uses what looks like carbon ink for the traces and contacts. Obviously silver would be way too expensive.
There is a shim/stiffener beneath the keyboard made out of cardboard!

I got my dollar's worth just seeing the insides. :-)