I found tis circuit in na old documentation from 1958. The circuit uses germanium transistor availble that time and hard to obtain today. The circuit is indicated for phono applications using variable reluctance transducer.
This circuit produces the sound of percussion such as blocks, drum, bell, etc. The frequency...
This circuit was suggested in an article in Radio Electronics magazine in January 1992. Other...
This circuit is used to test a triac and also to teach how it works. The load is an incandescent...