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 oscillator produces a signal with a central frequency in 1 MHz. This frequency can be...
This circuit was found in an Electronics Now of the 80s applying to NiCad batteries of the time....
This configuration, which does not have a very high Q, uses a 741 operational amplifier, but other...