This circuit generates noise pulses for audio equipment probes. The circuit is from a 90’s 303 Circuits. The operational amplifier is an input FET type.
An interesting option is the one that makes use of the MC3373 integrated circuit and which is...
We found this circuit in a Radio Electronics from February 1970. The frequency of 1,400 kHz in the...
This power step drains just 3.5 mA from the battery and can provide good playback on a 4-ohm...