The 2N2222 and BC549 transistors are two old components that are still universally used in the vast majority of electrical circuits today. Their applications include amplifiers, filters, impedance ...
Create a CircuiTikZ file of NPN 2N2222 transistor driving a LED. Draw the black ground from (0,0) to (4,0) and label it "GND". Draw the positive rail in red from (0,0) to (4,0) and label it "+5 volts" ...