Very strong audio spikes in a headset can damage the ear. This circuit, from a 90s Popular Electronics cuts them, being originally indicated to operate with an integrated amplifier of the time.
Critical components of this project are the Geiger tube and the 300V battery. The battery can be...
Found in a 1967 Ferranti documentation, this regulator makes use of an operational amplifier of the...
Found in a Popular Electronics from the 90's, this circuit can generate frequencies according to the...