- Joined Nov 19, 2019
I tried to create the circuit above but when I tested it, the current across the load was different for different loads. Is this expected? If it is, it seems weird because I thought the current is independent of the load since this is a constant current source.
VCC (Red Line on the breadboard) is 5VDC
Here I'm trying with load an 1kΩ resistor, the current is 1.97mA:
As you see the transistor in the picture, the pins from left to right are controller, base, and emitter. R1 and R2 on the bias are 100Ω and Re is 1K.
The transistor has a b=420 (Model is 547C).
Then I changed the load from 1KΩ to 10ΚΩ and the current was 0.36mA:
In the second picture, it seems like the load (10kΩ) goes into the base, but it is connected to the collector (First pin from the Left).
Did I do something wrong?
As always, thank you