>
> * A component of a circuit that will make and break the circuit so that
> a pulsed DC will result from a constant voltage source.
>
>
I am pretty sure there are high power solid state relays or SCR's out
there that could easily handle 10A loads. I think stage lighting
equipment used to use stuff like you are talking about. Check a good
electronics supply house. If you get a solid-state relay, one with fast
switching speed, you can drive it with your 555 IC and switch the high
current DC. Good luck!
-Rob Hulsart