How can I add a transistor to this 555 PWM?

dfgsdfg

Can anyone help me out. I want to add a mosfet to this 555 pwm schematic because I don't want it to fry... How would I go about adding a transistor to it? Posted Image, might have been reduced in size. Click Image to view fullscreen.

Posted Image, might have been reduced in size. Click Image to view fullscreen.

andrewF · Posted: Sun Nov 22, 2009 2:24 am Post subject:

why do you think it will fry?

dfgsdfg · Posted: Sun Nov 22, 2009 11:14 am Post subject:

Well because I am using a 12v motor and will be using a 12v power supply... do you think it should be fine without a transistor?

andrewF · Posted: Sun Nov 22, 2009 6:03 pm Post subject:

I see
12V is fine for a 555, but maybe the current draw will be more of a concern. just a guess tho.

how about this circuit -
http://www.nomad.ee/micros/pwm555.html