Transistor as a Switch, Saturation Calculator
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A BJT transistor can be used as an
electronic switch when it is driven into saturation, or alternatively
driven to the cut off region. Calculating the base resistor is a
common engineering task, which this calculator automates.
The current through the load at saturations is Ic=
base current must be Ib= Ic/Beta. Transistors have a varying gain so we
want to use the minimum beta value, to ensure saturation.
Rb= (VP-VBE)/Ib= (VP-VBE)*Beta/Ic=
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