EEVblog #643 – Mailbag


Mailbag Monday

Spoilers:
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

About EEVblog

Check Also

EEVblog 1499 – EcoFlow Delta Pro 3.6kWh Portable Battery TEARDOWN!

Teardown of the EcoFlow Delta Pro 3.6kWh portable/home LiFePO4 battery solar inverter/generator. Back in the ...