This circuit uses three inverters to generate a rectangular signal whose frequency depends on R1 and C1. The circuit is from a March 1996 Electronics Now.
This circuit generates the sound of bells. We found it in a 1977 Radio Shack publication. The...
This circuit generates trains of pulses in regular intervals determined by R1 and C1. The...
This circuit can be used with the CB4296E receiver or others described on this site. The circuit...