For the 1 MHz frequency, the pass band of this filter is only 120 Hz wide. The filter is suitable for telecom applications and its impedance is 600 ohms.
This old receiver (1967) uses germanium transistors from the time and coupling transformers,...
This circuit can act as a shield being controlled by a microcontroller by pin 1 or 2. The...
A negative pulse applied to the input of the circuit shown in figure bellow turns on the relay....