Hi, I was wondering if anyone knows about the sensitivity of the arduino to rf. I wish to use my arduino mega (1280) as an interrupter in my dual resonant solid state tesla coil, but I do not want to damage it, nor can I have any kind of spastic output, as if the output becomes continuously enabled, the primary current will build up too high, and i'll end up with $100 worth of dead igbt's. So, as a precaution, I need to know about the shielding requirements. Most likely a large amplitude at ~190 khz. thanks.
Thanks. While I realize there is risk of damage to my arduino, I have found that it is the simplest approach to getting more than just a square wave with adjustable on/off time. What I am looking to do is be able to mimic a waveform and observe the arc formation. I'll make sure to shield it completely. Like BNC connectors plus 100% enclosure in copper. 
Tanks! I'll look into getting some of those feed-through capacitors. I may also try sin an opto-isolator. And, I'm glad to say I've found a way to use a current sense transformer to keep primary current from getting too high.