2N3904

Small-signal NPN transistor.

Tutorial / documentation

Transistors & diodes

First tests with 2N3904

  1. Identify the exact 2N3904 variant, package and manufacturer documentation.
  2. Identify power, ground and signal pins in the documentation. Assemble the circuit with power disconnected.
  3. Follow the manufacturer’s evaluation circuit. Use a current-limited low-voltage supply and the recommended logic levels.
  4. Mesurez les signaux d’entrée et de sortie. Comparez leur comportement à la fonction : transistor npn petit signal.

2N3904

Small-signal NPN transistor.

  • Identify the exact 2N3904 variant, package and manufacturer documentation.
  • Identify power, ground and signal pins in the documentation. Assemble the circuit with power disconnected.
  • Follow the manufacturer’s evaluation circuit. Use a current-limited low-voltage supply and the recommended logic levels.
  • Mesurez les signaux d’entrée et de sortie. Comparez leur comportement à la fonction : transistor npn petit signal.
Technical documentation