#2N3904 TRANSISTOR PORTABLE#

Due to this biasing current, 2N3904 goes to the saturation state and the LED turns ON. When the switch is closed, the base of the transistor is biased, and current flows to the base of the transistor. Due to this, 2N3904 remains in the cut-off state and the LED does not glow. The collector current differential between the two transistors is the most important factor to consider.

#2N3904 TRANSISTOR PORTABLE#

And no current flows to the base of the transistor. The BC547 transistor can be used in place of the 2N3904 transistor, however, there are some conditions that must be met before utilizing it instead of the 2N3904. Mashem 600PCS TO-92 Transistor 15 Types Values Kit Set 2N222/ 2N3904/ 2N3906/ 2N5401/ 2N5551/ A1015/ C1815/ C945/ S8050/ S8550/ S9012/ S9013/ S9014/ S9015/ S9018 with Assorted Storage Box Portable Excellence quality, we ship worldwide Affordable prices with Fast Delivery to Your Door. When the switch is open, the base of the transistor is not biased. The required resistor value can be easily calculated using Ohm’s law. It is mostly used by electronic students and hobbyists in their projects, but it is also used in commercial electronic products. Proper biasing of the base ensures adequate base current to turn ON the transistor.Ī resistor of 220 Ohm is connected between the load(LED) and the collector terminal to protect the LED from overcurrent. 2N3904 is a widely used general purpose transistor. The base of the transistor is biased using a 10 K Ohm resistor(R3) in parallel to the 1 K Ohm resistor(R2) plus base-emitter junction resistance(in series). The complete circuit is powered via a 5 V supply.

In the circuit diagram given above, 2N3904 is used as a switch to turn ON/OFF an LED connected at the collector terminal.

2n3904 transistor