I agree. You already have logic levels.. SO you might as well use a logic-level MOSFET.You need a source of 9 volts in the circuit somewhere to generate a 9 volt gate drive signal.
You could add another battery, or regulator and activate an everyday average transistor to send its voltage to the mosfet gate.
Very sloppy solution. Better solution is to substitute a logic level driven MOSFET for the 9 volt one.
The OP specifically mentioned a JFET, which is why I asked for information. Power FET's take 10 volts to turn fully on (unless logic level).I agree. You already have logic levels.. SO you might as well use a logic-level MOSFET.
That point does need to be cleared up a bit.The OP specifically mentioned a JFET, which is why I asked for information. Power FET's take 10 volts to turn fully on (unless logic level).
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