EEVblog #643 – Mailbag

Mailbag Monday

Dual voltage source selection circuit
Casio FX-7000G the world’s first graphing scientific calculator, circa 1985.
A 1989 vintage analog ohmeter.
Teardown of a 450W electronic dimming module.
Forum HERE

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    • Ivan Berton

      27:02 LeninstraBe :-))))))))) very funny. The sing looks like a “B” will be pronounce as two “s”. Correct: Leninstrasse. Greets from Switzerland. Maybe I send you mail too whit some other strange sings on the letter.

    • VEB = Volkseigener Betrieb = nationally-owned enterprise

    • Synthetase

      Plenty of info on dimmers here:

    • Paul

      I would say that in Germany somewhere ,you would be able to get parts for that lovely ohm meter, and you should really look after the history of it. I challenge you to fix it Mr D

      • Agent24

        Yeah, it can’t be that hard, probably one of those resistors has gone high value or the switch is dirty. What else could go wrong?

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