2N Datasheet, 2N NPN General Purpose Transistor Datasheet, buy 2N Transistor. Part Category: Transistors Manufacturer: Vishay Intertechnology, Inc. Description: Small Signal Bipolar Transistor, A I(C), 40V V(BR)CEO, 1-Element, NPN. December, − Rev. 4. 1. Publication Order Number: 2N/D. 2N, 2N 2N is a Preferred Device. General Purpose. Transistors. NPN Silicon.

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2N3904 Datasheet, Equivalent, Cross Reference Search

The common emitter class A amplifier is always inverting even if you use a PNP, the only difference is you invert the power supply polarity. Felice Pollano 5 I’m looking to simply read the generic sound level from an Electret Microphone. Capacitors do not allow DC voltages pass through them.

Ehryk 4 11 Imagine that there is nothing else but the below schematic:. Yes, but a diode will drop 0. Now, let’s look at the amplifier itself. But remember, we had some biasing to it which is a DC voltage.

The same value resistors and capacitors, the same 2n transistor, added to the output of your existing schematic, would provide a second inversion. If you use an audio transformer instead of a capacitor you could change the signal phase as you please.


Very insightful The same value resistors and capacitors, the same 2n transistor, added to the output of your existing schematic, would provide a second inversion. Views Read Edit View history. I realize I could easily correct for this in software, but it just seems backward to me in a way and I cannot find any examples of a non-inverting output with a PNP transistor.

In order to solve your final question anyway, you have to rectify even with a single diode the output and apply the result to a load a resistor would be fine and feed this to the arduino analog input. If you have an oscilloscope, view the waveform on the output.

Wikimedia Commons has media related to 2N Here’s what I want instead:. Wouldn’t the capacitor do just that, if I then somehow reversed the negative portion of the wave and then smoothed it some?

Joan 5 6. The higher-power 2N is a very similar NPN transistor that can safely switch three times as much current as the 2N Then, read the analog value on the collector of Q1. I’m not looking for a logicthe Arduino’s analog inputs have a bit ADC that gives for 0V-5V, respectively.

We have blocked the DC portion of the voltage on the electret microphone. With the right component values, you will be able to have an analog voltage level depending on the sound amplitude. Is there a reason for this beyond being uncommon? IF you are talking about DC levels the question is still unclear.


You will probably need electrolytic capacitors. You can use values up to uF.

Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site the association bonus does not count. It is designed for low current and powermedium voltageand can operate at moderately high speeds. First of all the part with the microphone. You can beg Google for more detailed information.

2N Datasheet, Equivalent, Cross Reference Search. Transistor Catalog

By using this site, you agree to the Terms of Use and Privacy Policy. In other projects Wikimedia Commons. If it was fully OFF, it would be not conducting at all. Reading your question and comments it appears that your questiojn is not clearly stating what you want.

When there is a whisper, the peak to peak amplitude will be about 1Vpp with changing frequency because of the speech.