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 monostable circuit uses one of the two flip-flops available on the CMOS 4098 integrated...
This crystal-controlled oscillator generates a 1 MHz rectangular signal and can be used as a time...
Suggested by a 90’s Radio Electronics, this circuit automatically activates the recording switch of an...