Posted: 6 years ago
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We created a small 555 Mind Mangler using a 555 Timer Chip. This mangler creates a very high pitch sound that makes it very difficult to detect. This Mangler is similar to the Annoyatron by Think Geek except that it doesn’t have a delay and it’s a constant sound.

The sound is still annoying as hell though, and because of it’s frequency it’s hard to tell what direction of the room it’s coming from.