Hi,
I am connecting the PWM output of a PIC to the gate of an IRF4905 Mosfet.
On the drain side is connected to ground thru a 100 ohm resistor. The source side is connected to +5vdc with the same ground reference as the pic. Everything works great. But, if I change the source voltage to +12vdc with the same ground reference I just see the 12 vdc on the scope and no pwm.
Has anyone got any ideas what I am doing wrong?
Thanks, Don
I am connecting the PWM output of a PIC to the gate of an IRF4905 Mosfet.
On the drain side is connected to ground thru a 100 ohm resistor. The source side is connected to +5vdc with the same ground reference as the pic. Everything works great. But, if I change the source voltage to +12vdc with the same ground reference I just see the 12 vdc on the scope and no pwm.
Has anyone got any ideas what I am doing wrong?
Thanks, Don