This circuit can be used to generate percussion sounds such as bell, triangle, etc. The circuit must be powered by symmetrical source and the triggering is by external pulse.
This circuit, from a 1981 publication, can be changed to use more modern components such as the...
This circuit found in old documentation is based on the 709 which is an operational amplifier that...
This circuit uses an operational amplifier that is still common today. The indication is made by...