The value of collector to emitter volts is about thirty volts with a transition frequency of about two fifty megahertz.

This current value makes it more effective than other To-92 packaging that has the highest value of collector current about 100mA to 200mA. The highest collector curent for this transistor is about six hundred milliamperes.It is the best option for electronic projects since comes in quality packing at less cost so it is a fine option for projects and electronic devices.Mostly used in speakers & home entertainment systems.The amplitude of the output audio signal can be adjusted by a preset pot (100K) before being sent to the 8 Ohm speaker. The amplified collector output passes through a filter capacitor (47uF) to remove any residual noise from the output. Here, a 100uF capacitor is connected to the base of the transistor, blocking the DC component while allowing the AC component of the signal to pass through. The input goes to the base of the 2n2222 transistor acting as a control signal. Working ExplanationĪudio input is taken from a device such as a microphone/smartphone. Solder the speaker input between the middle terminal of the 10K pot & the GND of the circuit.ħ) Connect the Audio IN between the 47uF capacitor & GND of the circuit.Ĩ) Solder the Audio OUT to an 8 Ohm speaker.

Also, Solder a 100K pot to the Audio OUT.Ħ) Connect the 9V battery clip. After that, connect a 100pF capacitor between the collector of the transistor & the Vcc of the circuit.ĥ) Connect a 47uF capacitor between the collector terminal of the transistor & the Audio OUT of the circuit. Then, connect a 10K resistance between the collector pin of the transistor & Vcc of the circuit.Ĥ) Connect a 470 Ohm resistance between the collector of the transistor & the Vcc of the circuit. After that, solder the +ve terminal of a 47uF capacitor to the base of the transistor (Audio IN).ģ) Connect a 100pF capacitor between the emitter & base pin of the transistor. For a detailed description of pinout, dimension features, and specifications download the datasheet of 2N2222 Useful Stepsġ) Solder the 2n2222 transistor on the Veroboard, after that solder a 47K resistor between the base of the transistor & the ground of the circuit.Ģ) Solder a 470K resistor from the base of the transistor to Vcc of the circuit.

2n2222 pinout download free