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Yes, I believe you can wire smaller individual ones in series.
So I have this built using a 9 volt battery and a rectifier connected to the receiver to convert back to dc power, but I want to use this on my 12vdc 2a power supply. I'm using a 2N3904 transistor, and I want to know if there will be a problem with amperage or base voltage with max being 5 volts on the base. I know a circuit only pulls what it needs, but I just want to be sure because I only have a few transistors.
Transistor Basics - BJTs