Calculator

Computing

What The Heck Was A Comptometer?

3:00AM February 13, 2011 | Casey Chan

This 1942 ad for a comptometer is just perfect because first of all, I had no idea what a comptometer was (a mechanical calculator, basically) and second, the spec sheet is wonderful: no glare dials, elimination of non-essential zeroes, and a “Keystroke Censor.” More »


Science

Calculate How Much Damage An Asteroid Will Cause

7:00AM November 7, 2010 | Casey Chan

Asteroids headed for Earth are always scary. So get to know them a little! You can use the Impact: Earth! calculator to see what kind of damage an asteroid will cause. It’s totally not as scary when you crunch the numbers. More »


Gadgets

Canon Calculator X Mark I Is Made Out Of Recycled Lenses

1:00AM January 6, 2010 | Matt Buchanan

It’s just a calculator. But a very nice one, designed by Canon’s camera group, and it uses recycled PowerShot lenses for the glass elements. It’s 30 US dollars. More »


Gadgets

My Most Memorable Gadgets, By Steve Wozniak

1:00AM July 4, 2009 | Jason Chen

We’re kicking off our series exploring memorable gadgets from memorable people with one most influential tech giants: Steve Wozniak, co-founder of Apple. – JC More »


Software

HP Invents Time Machine, Converts iPhone Into Classic Calculator

7:20AM June 26, 2009 | Jesus Diaz

Nerds of the world jump of happiness, for HP has brought the legendary HP 15C Scientific Calculator and the HP 12C Financial Calculator for the iPhone and iPod touch, complete with custom skins and programming. More »


Mobile

T-Mobile Probably Did Not Sell 1.5 Million G1 Pre-Orders

4:45PM October 16, 2008 | Gizmodo US Edition

Did the announcement that T-Mobile sold 1.5 million G1 pre-orders sound a little too fantastic to be true? Information Week thought so and talked to the guy behind the astronomical number–a mathematician at The Motley Fool. Turns out that some iffy multiplication may have been involved and the number of pre-orders sold is probably closer to 200,000 to 300,000. Big, but not crazy big.

More »


Gadgets

Find Your Riches With A Home-made Metal Detector

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1:46PM February 25, 2008 | Nick Broughall

Turn A Calculator Into A Metal Detector – video powered by Metacafe

Our good friends over at Lifehacker found this video tutorial gem on how to create your own metal detector on the cheap.

Essentially, by just sticking a calculator on the back of an AM radio you can create an annoying tone sound when you put the two near a metal object. There’s something about radio frequencies and digital signals or something, but who cares how it works when you know that it does work.

As far as hacks go, you won’t get much easier than this. Plus, you’ve probably got the necessary components somewhere in your garage. What better way to spend your evenings?

[Metacafe via Lifehacker] More »


Gadgets

Piano Calculator Makes for Musical Math

12:40PM November 29, 2007 | Sean Fallon

If math wasn’t already annoying enough, this unique piano shaped calculator plays a tune with each key pressed. In the right hands, crunching numbers could become a tiny concerto. But in your hands, it will undoubtedly result in a swift and brutal retaliation by your fellow co-workers. Let’s just hope Phillip Glass doesn’t get wind of this. Available for 1000 Yen or around $10. [Product Page via TFTS] More »


Gadgets

Make a Metal Detector For Like 5 Bucks and 2 Minutes

8:10AM November 25, 2007 | Mark Wilson

We’ll admit it: we’ll lack the ambition to perform most of the hacks you read about on Giz. But taping a calculator to an AM radio to make a metal detector? That’s right up our alley. And by “right up our alley” we mean probably still too much effort…but not by much. More »


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Digital Card Calculator Spycam Is Sneaky Circa 1985

12:45AM October 2, 2007 | Wilson Rothman

You’re in a hotel lobby when your mark walks in. You pull out the Digital Card Calculator Camera and pretend to casually crunch sums, while in reality you are snapping Top Secret Digital Photographs. Your target would only know you’re a spy if he/she spots the enormous VGA lens and bezel right next to the keypad. It’s a good thing, then, that you’re reasonably inconspicuous in trenchcoat and matching fedora. A technical question, though: if it’s got a lithium-ion battery for the camera and a 1.5V button battery for the calculator, how’s come the solar panels? More cloak n’ dagger deception, I imagine. [crimebusters911.com via OhGizmo] More »