In the circuit below, what is the purpose of R1? The circuit works with a wide variety of resistors at that point. If current is limited by the transistor why is it needed? And how do we find it's more optimum value
I'm want 1mA with a load varying from 100 ohms to about 14K ohms.
thanks all
I'm want 1mA with a load varying from 100 ohms to about 14K ohms.
thanks all
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