This circuit for medium and short wave range was found in an American documentation from 1992. The circuit can use general purpose transistors and the antenna can be external or telescopic.
Found in an American documentation from 1968, this circuit senses the temperature through an...
This circuit is intended to trigger an alarm when the input voltage exceeds one value and to...
This 80's amplifier delivers 6 W of 8 ohm speaker power without using an output transformer....