We found this circuit in an old English documentation. Transistors support modern equivalents. The circuit converts signals in the 5 to 15 MHz band for tuning into a common medium wave radio.
The circuit is from the National Semiconductor Linear Applications Handbook published in 1994. The...
April 2017 - New Texas Instruments DRV8x brush motor drivers for 1.7 to 8 A currents and voltages...
The indicator for this circuit is a mini buzzer with a 1.5 V oscillator. The circuit can also be...