3 ms·
Combine this with the sibling thread about lead acid battery voltages (2.1V per cell, 3 cells gives 6.3V), can we then say that this is the reason 5V circuitry
by regularfry 4y ago
Combine this with the sibling thread about lead acid battery voltages (2.1V per cell, 3 cells gives 6.3V), can we then say that this is the reason 5V circuitry is so common? 6.3V from battery ancestry plus a linear regulator?
- Gibbon1 4y agoYeah I think even earlier 6.3 volts was also the voltage used for the heating element on vacuum tubes. I think because very early radio's used 6V batteries for the coils. And a separate high voltage battery for the plates. Would not surprise me if there are roots going back to telegraph.