Microcontroller light dimmer - amplifying light bulb

Thread Starter

markodaguy

Joined Mar 24, 2015
9
Hey,
I need some help with a school project. I'm building a light dimmer circuit with the use of microcontrollers; specifically using the PIC 18M2 to control the dimming of the light bulb. With 18M2, I am using a pwm code which can vary the voltage depending on a readadc input voltage. The code works perfectly but I would like to use a 7V filament bulb (so I can vary the voltage from 1-7V) as the output however the maximum voltage rating of the 18M2 is 4.5V. I was thinking about using a MOSFET to amplify this voltage but I'm not sure on how to do it. Does anyone know of anyway that this could be completed?

Thanks
 

GopherT

Joined Nov 23, 2012
8,012
You need a mosfet that will switch at "logic level", several amps of current handling capability and low gate capacitance.

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