Hi all!
I'm trying to make a pulse width modulated heating element, and I've run into some issues. You'll notice there are two rectifiers, a low voltage and wall voltage rectifier. My plan was to have the 555 power the gate on a 200v, logic level gate mosfet, which would switch the 170 volts DC to the load.
The 555 PWM works fine, but when I connect the ground returns for each rectifier, the 555 square wave disappears with respect to either ground. It's very strange.
I also tried to set up an opto isolator between the 555 and the gate of the mosfet, but I didn't have any luck getting it work. I may ask more specific things about that later. As of now, any ideas would be helpful!
Thanks
I'm trying to make a pulse width modulated heating element, and I've run into some issues. You'll notice there are two rectifiers, a low voltage and wall voltage rectifier. My plan was to have the 555 power the gate on a 200v, logic level gate mosfet, which would switch the 170 volts DC to the load.
The 555 PWM works fine, but when I connect the ground returns for each rectifier, the 555 square wave disappears with respect to either ground. It's very strange.
I also tried to set up an opto isolator between the 555 and the gate of the mosfet, but I didn't have any luck getting it work. I may ask more specific things about that later. As of now, any ideas would be helpful!
Thanks