This circuit produces the sound of percussion such as blocks, drum, bell, etc. The frequency depends on the marked capacitors, which can have a wide range of values depending on the desired sound.
This variable voltage reference uses a Norton operational amplifier. The voltage is adjusted at...
This circuit was found in a 90s Electronic Design. The circuit was designed to be powered by a 4 - 20 mA...
This tone generator for CW was found in a publication by Gernsback from 1960. The circuit makes use...