2N7002 - Datasheet, Application Circuit, Price & PDF Yangzhou Yangjie Electronic Technology Co.,Ltd

2N7002 Application Circuit

2n7002 physical picture

The 2N7002 is a small electronic switch used to control the flow of current. It controls the switch by voltage and is generally used in low power circuits. And he is cheap, so often used in remote control switching power supply.

2n7002 three poles

1. Shan pole: control transistor switch, connected to the control signal through a resistor.
2. Source: current input terminal, connected to the negative terminal.
3. Drain: current output terminal, connected to positive terminal.

2n7002 Circuit Analysis

The circuit starts to work, generating lots of electrical signals  The electrical signals are passed through a resistor to the transistor, telling it when to switch on and off  When a strong enough signal is received, the transistor turns on, allowing current to flow through it  The current passes through a resistor, generating the voltage or power we need  When the signal gets weak, the transistor turns off, preventing current from passing  until no current flows through the resistor and the output voltage drops to zero  This process is repeated over and over again, switching the transistor between on and off