I am trying make a current sink using a BJT transistor. In the diagram shown, the current across the V1 is changing by changing the variable resistance (VR7). LM385M is providing a fixed voltage of 1.24 V at the base.
I want to change the collector current (Ic) by changing VR but the current is fixed to around 100 uA. What is the mistake in the circuit.
How can Ic be changed by changing VR?
I want to change the collector current (Ic) by changing VR but the current is fixed to around 100 uA. What is the mistake in the circuit.
How can Ic be changed by changing VR?