This DC motor control uses a power operational amplifier. We found it in December 1984 in the Radio Electronics magazine. The amplifier must be mounted on a heat sink and the maximum current is 1 A.
This circuit uses a loop antenna to receive and amplify signals from the 60 kHz long wave band....
The frequency of this oscillator depends on R and C (see math section for electronics). The...
This common operational configuration can be implemented with modern equivalent. Next to the...