[tinix]

you might be surprised how much you can do with a simple spark gap.

a grill lighter or modified milty zerostat can easily inject faults, albeit more manually and less precision than one of these timed devices. but it's also an order of magnitude or two cheaper...

[Onavo]

The first radios were spark gap transmitters (see Hertz's famous experiment). Though to be clear, Hertz's experiment was rather unconventional as the spark gap served as both the transmitting antenna (albeit a fairly noisy one) and also as a switch. Subsequent designs utilize the spark gap only as a high voltage switch. In modern tank circuits, this "switch" is replaced with a solid state transistor (or similar type of devices).

Modern plasma antennas are much more advanced than the traditional spark gaps.

https://en.m.wikipedia.org/wiki/Plasma_antenna

[mycatisblack]

You know those cigarette lighters with an electric spark? Start a download over wifi, press the lighter a number of times in quick succession. Wifi disconnects.

[colechristensen]

You can also damage parts with those things just from the EMI they radiate.