Only for reference this is a circuito f a commercial receiver of the year 1958. The circuit uses coils and transformers hadr to find in our days. The circuit is destinated to receive MW stations.
We found this circuit in the magazine Eletcronics Now of July 1994. The power supply is according to...
This simple circuit produces a tone when triggered by any vibration picked up by the sensor. The...
In the figure we show how two diodes can be used to simulate the center tap of a push-pull driver step....