We found this circuit generates signals from 200 Hz to 62 kHz and can be used to repel mosquitoes and mosquitoes. The circuit can be powered from 2 small batteries to 9 V battery.
The operational amplifier used in this circuit is a low voltage type from Texas Instruments, being...
PWM signals can be used to produce sounds in a microcontroller. This circuit allows sounds to be...
We found this circuit with an operational transconductance amplifier in the Motorola Linear...