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.
We found this circuit in an American 80's documentation. The resistors must be of high precision...
The circuit shown is a Pierce type oscillator and operates at the fundamental frequency of the...
In the circuit shown in the figure we have the way to excite a small speaker from a TTL output. The...