Look, [lord feistel] is doing glitching attacks on an ATMega328P! All you need is an Arduino board with its few SMD capacitors removed or a bare 328P chip, a FET, and some sort of MCU to drive it.

[The Tweaker] has soldered an LED circle on the top of an ATmega328P chip ... spiral so the LED terminals are hooked up to the right pins, but it seems to add to the aesthetics of the project ...