The common emitter is the configuration of the transistor, it is the best voltage amplifier circuit using NPN 2n2222 transistor.The figure shows the amplifier circuit using a 2n2222 transistor.As when the switch closes, the transistor starts work, and the LED ON and OFF interval control by the resistor value.Ģn2222 transistor as an amplifier 2n2222 transistor as an amplifier.The circuit shows the 2n2222 transistor as a switch, as we can see an input resistor used to drive the transistor and another resistor to drive the LED.It is the most popular general-purpose transistor type used in electronics.Ģn2222 transistor as a switch 2n2222 transistor as a switch.Each of the 2n2222 equivalent transistors listed here is NPN bipolar and most of them are identical transistors.
#2N2222A TRANSISTOR SUBSTITUTE PDF#
If you need the datasheet in pdf please click this link 2n2222 Equivalent The transition frequency of the 2n2222 transistor is 250MHZ, it is the maximum frequency on this frequency.The maximum bias current on the 2n2222 transistor is 200mA, the maximum allowable bias voltage on the trigger terminal.The maximum collector current at the 2n2222 transistor is 800mA, this particular current value is the maximum current at this device.The 2n2222 transistor is a bipolar NPN transistor, the maximum current gain for the 2n2222 transistor is 300h FE and the current gain value will decide the amplification factor for the transistor.Collector to Base voltage ( V CB) is 60V.Collector to Emitter Voltage ( V CE) is 30V.DC Current Gain range is 30 to 300 h FE.The TO-18 transistor package had a higher temperature withstanding capacity.
For this 2n2222 transistor, TO-18 metal can package.
Unless you have a huge box of transistors to destroy while you learn the hard way. This kind of high-power circuit is NOT the kind of circuit that is good for beginners to experiment with. Or at least not well enough to try to substitute components and/or modify the circuit. It appears that you do not understand how transistors work well enough to attempt to build this circuit. If you omit those resistors, you will DESTROY them with over-current going into the Base. Yes, you need the transistors to limit the current going into the Base terminal of the transistors. These are of OPPOSITE POLARITY and if you connect them as shown in your diagram you will INSTANTLY DESTROY the transistors from REVERSE POLARITY. And that is want is happening to your 2222 transistors.įurthermore, you are trying to use NPN transistors in a circuit designed for PNP transistors. The bicycle would simply be crushed under the load before it even starts. Using a 2N2222 in a circuit designed for a 2N2955 is like using a bicycle to haul a ton of freight. A 2222 is a TINY, SMALL-SIGNAL transistor capable of 1/2 Amp and 1/2 Watt. The frequency depends on many characteristics of the transistors and even the wiring, so you shouldn't use something like this for anything other than a lamp, really.Ī 2955 is a LARGE, HIGH-POWER transistor capable of 15 Amps and 115 Watts. Also remember that a circuit as simple as the one you posted will never be giving you a 50Hz sine. If you pick a different transistor, there's a chance you'll have to user other resistors, too.Įdit: if you just want to build a simple AC-generator, there are other circuits that use NPN transistors. You do need the resistors in order to limit the base current and stabilize the circuit. So they're behaving very differently.įor this simple circuit you could use about any standard PNP transistor that can handle the 12v (+ margin because of inductive load) and the 1A current (you're probably going to need a heatsink if you want to run this for more than a few seconds). NPN is the other way around, it conducts if the base electrode is at a potential higher than the emitter. In simple terms, the PNP transistor will conduct if it's base electrode is at a lower potential than the emitter. The 2N2222A is NPN and the MJ2955 is PNP.
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