Originally Posted by alansplace
Butcher certainly did think this problem through very early on. Throughout the 14 novels and the assorted short stories I've read he has been very consistent and true to the concept. Harry's very aware of this and can even use the effect to his advantage as he can concentrate on a device and burn it out or avoid doing so by not getting too close and getting past the particular item quickly. Also the effect varies depending on the complexity of the item and the magical power of the individual practitioner causing the effect. Harry is also very aware of this aspect as it pertains to him personally.
Doesn't it also depend on his mood (the madder he gets, more likely something electronically will go wrong)?