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 component manual itself. The frequency can be changed and the power...
This crystal-controlled circuit was obtained from a 1980s documentation. The power supply should be 5...
The critical component of this amplifier is the output transformer. We found the circuit in an old...