2N3904 NPN Transistor
TR3904
TR3904 NPN small signal transistor, as used in most basic solarengine designs.
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The TR3904 NPN small signal transistor is used in most solarengine designs.
Can't find them or trust the ones you pick up from a local supplier? These are pulled from the stock we build our own kits from.
The PNP complement to this transistor is our TR3906.
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