This circuit was found in the September 1989 issue of Radio Electronics magazine. The circuit uses components that support modern equivalents such as the operational amplifier.
Found in an English Maplin documentation from 1983, this circuit generates separate frequency...
This circuit uses a piezoelectric transducer to produce sounds like a buzzer. Frequency is...
Guitar preamp (CB22146E) Found in an English publication from 1989, this circuit uses a still...