What is the replacement of 2N3904? is 1N3904 can replace it?
2n3904 represents an N-type transistor, and 2N3906 is a p-type transistor. This is the transistor that we use the most as the control signal in the design of the circuit. What are the characteristics of these two transistors? The main feature is that it is extremely fast! That is the switch tube we often say! When we design the control part of the circuit, we only care about signal processing. In this case, we only need low-power triodes such as 2n3904 and 2n3906. The biggest feature of this kind of tube is its relatively fast speed, which means that our biggest advantage in the control process is that it has very little delay...