This circuit generates a strong audio tone that scares away mosquitoes. Care must be taken that, due to its potency, it can also cause discomfort to very close people and domestic animals.
This circuit was found in the Intersil Databook. The integrated circuit used is uncommon today. R2 sets...
We find this circuit in a radio amateur publication of 1977. Its purpose is to measure the...
This circuit that can be used as a three-tone domestic bell has a traditional configuration that...