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 I tried to make them look at disgruntled as possible. - Katie_UPS [more] |
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| I tried to make them look at disgruntled as possible. - Katie_UPS [more] |
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#31
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Re: Turning LEDs on/off
While we're on the subject of series resistors for the signal line, attached is a sketch of the circuit using one of those NPN transistors you got in the package you bought (2N3904). Can someone please check my calculation for the base resistor? I tried to size it to saturate the transistor with a 5V signal. |
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Linear Mode
