Sergei Frolov

Soviet calculators and computers collector. Welcome to my website at

[Sergei Frolov @sfrolov]

My main site and hobby is Soviet Digital Electronics Museum
https://t.co/gsXscQCFWy
Welcome also to my Livejournal blog at https://t.co/8nj91CaFI8

[Sergei Frolov @sfrolov]

Casio CQ-1 and CQ-2. 1977th. Same functions, CQ-2 has bigger display.

[Sergei Frolov @sfrolov]

@TomekMalesinski @travisgoodspeed Agree with Casio fx-48, Elektronika MK-51 and Elektronika MK-38, but fx-2500 has not funcitons above 0-9 keys

[Sergei Frolov @sfrolov]

Merry Christmas and happy New year!

[Sergei Frolov @sfrolov]

Casio TC-10
Japanese domestic. Calculator, clock with day of week, phone book, currency converter and travel expense account

[Lepanto Institute @LepantoInst]

Some people are questioning the veracity of the claims that a statue of St. Peter in Argentina was struck by lightning on Dec. 17, pulverizing the halo, key, and blessing hand.

The Lepanto Institute sent someone to the location to take pictures and confirm the events. The Dec. 17 lightning strike is CONFIRMED and here are additional pictures of the statue.

NOTE: the lightning struck the statue, despite there being lightning rods some 30-40 feet above it (second and third picture).

[Sergei Frolov @sfrolov]

@System11b

[Sergei Frolov @sfrolov]

@System11b That's a great solution. I use the same purchased factory boards (to repair oscilloscopes and similar).

[Sergei Frolov @sfrolov]

@xxopxe @kenshirriff @Zeptobars I know interesting topic: https://t.co/2ABD2gdNx9

[Sergei Frolov @sfrolov]

@xxopxe @kenshirriff @Zeptobars Factory logos are rarely found inside the crystals. Usually developers draw something personal.

[Sergei Frolov @sfrolov]

Elka 43 bulgarian calculator (circa 1974)
https://t.co/GtoOzFw0J9

[Sergei Frolov @sfrolov]

Many simple calculators have a function to calculate the inverse of a number (1/X). To calculate this function, press "divide" and "equals".
https://t.co/nyk5Z2VzZG

[Sergei Frolov @sfrolov]

@nanzonet I agree that -CW models have become much less convenient than -MS, -ES and -EX.
You have to press a lot of buttons before you realise which menu a familiar function has been moved to.
Simply storing a number in memory has become a separate quest.

[Sergei Frolov @sfrolov]

@travisgoodspeed Some year ago I createrd this table.
Blue - own development, yellow - partial, red - full copy, pink - calculators plant purchased (from GI)

[Sergei Frolov @sfrolov]

Many hours of operation without turning off

[Sergei Frolov @sfrolov]

https://t.co/swmON72Rcz

[Sergei Frolov @sfrolov]

Some calculator videos for fans
https://t.co/lWckjtciAV

[Sergei Frolov @sfrolov]

https://t.co/LjZstNytQL