I tried to make this circuit using discrete 2n2222a transistors. I know that transistors must be paired to get the same current in both transistors, but was only a educational experiment i didnt need the exact current.
When i pluggee in the power source evrything was fine and i get a similar current flowing throght the right transistor, but, when i slightly raise the voltage up to 12v, the right transistor, stopped to follow the left transistor current, and if i wouldnt have limited the current, my led would blow up.
Why this circuit works with 10V but doesnt work with V > 10?
