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.
This circuit of the 80's makes use of components of the time. The circuit is from an American...
With this circuit general purpose diodes and rectifiers can be tested with ease R has 100 ohm for...
This three-transistor amplifier uses a JFET at the input to increase the input impedance. The...