🇷🇺 Микрокалькулятор Электроника МК-66: Часть 1 [#TCE0725]

Ad-free version on my Patreon ... https://www.patreon.com/TheCluelessEngineer Let's have a look at a late-Soviet engineering calculator called the MK-66. It was manufactured at the Iskra (Искра) plant in Ulyanovsk (Ульяновск) in the Russian SFSR (1988-1991) and then post-Soviet Russia (1991-1994). My Github repository: https://github.com/BrettHallen/Elektronika_MK-66 It utilises the КР145ИП16Б microcalculator arithmetic logic unit and has a ИЛЦ2-12/8Л display (VFD). Its original price was 47 Soviet Rubles without power supply, but this looks to have increased to 66 руб (or 73 руб with power supply) by the time this unit was sold in late 1991. The calculator came with its original box and manual (which includes the schematic). It runs on 4.5V either via a 2-pin power adaptor or three AA batteries. It does seem to work but doesn't respond to most key presses. Hmmm. Useful links: http://www.155la3.ru/k145_3.htm#k145ip16 http://www.leningrad.su/museum/show_calc.php?n=168 00:00 ... Intro 02:00 ... Opening the box 03:30 ... The calculator 06:10 ... Powering on 07:15 ... Disassembling 10:50 ... The keypad 14:00 ... Testing after cleaning 16:15 ... Keypad detached 17:15 ... Channel thanks & outro Check out my Patreon for regular blog-type updates between videos - there is a free membership tier and two paid tiers (US$2 and US$5). There is also a one-week trial for the paid tiers so if you don't think it's worth it, then cancel ... no hard feelings ... I appreciate any support, even if it's just subscribing to my YouTube channel! https://www.patreon.com/TheCluelessEngineer