I need a simple way to generate a PWM signal?

Alright, so I took apart an old RC helicopter with a spy cam in it, and noticed it has 3 wires, just like a servo, so I modified an arduino script to keep a servo on all the time, and voila, the camera entered recording mode, now, I have an idea for something to do with this. I want to make a projectile for my air canon to fire the camera from, I think it might look pretty neat, however, I need a small simple circuit to make a PWM signal, and one that is constant enough to keep it recording constantly. I've seen some 555 timer ones but they fluctuate apparently, and I think that might turn the camera off then on.

Try it. You ain't going to beat a 555 for price and simplicity.
kgee4 years ago
Question, what is s PMW signal/