One example of a bipolar junction transistor is the 2N2222 transistor. The 2N2222 has the capability to operate at high speeds and conduct low to medium current. It usually contains negatively or positively charged materials and is made from either germanium or silicon. This type of transistor is the most common on the market because of its small size and cost-efficiency. Three ways to use 2N2222 transistors in Connecticut are as an automatic on/off switch, for pulse-width modulation, and for current amplification.
Automatic On/Off Switch
One way to use the 2N2222 transistor is as an automatic on/off switch. When used in this way, the transistor can control the amount of power traveling from one part of a circuit to another. First, a voltage is applied to the base bin. Then, the transistor takes the current from the collector and conducts it to the emitter. When this occurs, the switch is considered to be on. If no voltage is applied to the base pin, no current is conducted by the transistor and the switch is considered to be off.
Pulse-Width Modulation
Another way to use the 2N2222 transistor is for pulse-width modulation. This technique is usually employed to control the amount of power that is delivered to a load. Pulse-width modulation can also be used to control the speed of DC motors. Finally, the technique can be used to help create analog voltage. The big advantage of using the pulse-width modulation technique to perform any of these tasks is that the power loss created when switching devices is very small.
Current Amplification
The third way to use the 2N2222 transistor is for current amplification. In this capacity, the transistor acts as a magnifier between two circuits or a circuit and a device. It takes the current from an input signal and increases its magnitude by a fixed amount. It then relays the amplified current to the next circuit or device. The 2N2222 transistor does a great job of driving high current loads and has a wide operational temperature, making it great at current amplification.
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