this may seem like a really dumb question, but the transistor dynamics just make my head spin.
i've wired it up like this:
5v-----12ohms------npn------1Fcap------G
the npn is switched from an I/O pin like this:
pin(5v)-------1kohm-------base
according to an online transistor calculator, i can't get more than about 90mA through the transistor (2n2222a) with this circuit. i need like 4 times that much current and i need to be able to switch it on and off from the arduino. does anyone know about this?
thanks, mike
i've wired it up like this:
5v-----12ohms------npn------1Fcap------G
the npn is switched from an I/O pin like this:
pin(5v)-------1kohm-------base
according to an online transistor calculator, i can't get more than about 90mA through the transistor (2n2222a) with this circuit. i need like 4 times that much current and i need to be able to switch it on and off from the arduino. does anyone know about this?
thanks, mike