windwaker: not sure what you mean by "calculate what the 2N2222 outputs"?
if you mean what data it outputs in this midi circuit example, simply plug a midi cable into your usb to midi adapter and in your computer run a program that can see midi messages (e.g. puredata example above).
if you mean you want to see when midi data is being sent, simply connect an led in line with the output of the collector on the 2N2222 to see the led flash when data is being sent.
if you want to understand how the 2N2222 works see http://en.wikipedia.org/wiki/Bipolar_junction_transistor
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fabienne @ Dec 19th 2005 2:47AM
windwaker: not sure what you mean by "calculate what the 2N2222 outputs"?
if you mean what data it outputs in this midi circuit example, simply plug a midi cable into your usb to midi adapter and in your computer run a program that can see midi messages (e.g. puredata example above).
if you mean you want to see when midi data is being sent, simply connect an led in line with the output of the collector on the 2N2222 to see the led flash when data is being sent.
if you want to understand how the 2N2222 works see http://en.wikipedia.org/wiki/Bipolar_junction_transistor