I have built constant current source using ua741 amplifier and npn BJT bc639. Circuit gives constant current of 100mA. My new problem is how to control that output current from let say from 20 to 100mA by output voltage. The whole project goes like this; the circuit has to give constant current (max. 100mA) which amount has to be regulated from outside with voltage.
Attachments
-
6.9 KB Views: 181
Last edited: