First off Hi all, I am new here.

Just looking at this from the Books perspective, as a game master I do not think I would allow this to happen, it seems to be very much against the spirit of the rules. Wizards are super powerful, but they have a down side, allowing them to be tech savvy would be like saying sure you can play a red court vamp and live by eating rare steak, it goes against what the character is.

That being said if I did the “rods” would have to be strong enough to drain all the magic in the area, and that would mean no magic use in the area.  The reason for this is in Dead Beat . If the Tech was inside a circle, inside a warded room without a draining device of some sort, then whenever the circle went down there would be a very good chance of blowing out the tech.

Also on the subject of magic circles, in the books Harry makes it quite clear that dust can break a circle. When doing a summoning he makes sure to sweep the area and clean it vary well, making sure that no dusts or stray dirt  accidentally breaks the circle.

Again this is based on the Books not the rules (at work without the rulebooks here), but when I run a game I will keep as close to the spirit of the books as I can.