Grand Idea Studio

High-Frequency Single Tone Generator

 

The High-Frequency Single Tone Generator, created in March 1989, is a simple mischievous device intended to annoy anyone within its range. A simple 555 timer generates an adjustable, high-frequency square wave, which is fed into a piezo buzzer, creating a difficult to locate audio output. For the ultimate in covert operations, the circuitry is hidden within a Sucrets throat lozenge tin.

Press

Altium OnTrack Insight

Meet Joe Grand

Altium Stories

Confessions of a Hacker known as ...

The Hacker Next Door Podcast

Hardware Hacker Joe Grand