I still have an old TI calculator somewhere (red LED, with a bubble lens over each digit). That thing would churn through batteries pretty fast, but has a port for an AC/DC adapter (wall wart). It was my main calculator in the shop for a while.
I still have my first calculator that did more than simple math. Haven't used it in 30 years. Went out to the shop, got it and it came on! That's one heck of a battery.I remember my first Texas Instrument electronic calculator - an SR-10. It cost about $100, got it at Sears, had the four basic functions, sqrt, 1/x, etc. - about the same as what you give $1.99 for at the Dollar Store today.
I remember finding one of those at my grandparents house when I was a kid but I never figured out how to use it.Anyone else remember these - they came out about 1955 and cost about $1. I had one but didn’t put it to too much use IIRC.
https://www.google.com/search?q=magic+brain+calculator&ie=UTF-8&oe=UTF-8&hl=en-us&client=safari
View attachment 158869
I learned on a rotary calculator if any of you know what that is.
Never heard it called that, it was about the size of an old typewriter with keys, you typed in the numbers hit + or minus etc and cranked the handle for the calculationWas that what they called a "circular slide rule"?
Aarond
.
Enter your email address to join: