This circuit was found in Radio Electronics magazine from August 1966. The transistors are from the time and the power supply from the power grid is included.
This circuit uses two oscillators to produce a sound that seems the sound of a ring-bell. The...
This circuit is used for remote current monitoring. In the original version of the 80s a lamp is...
We found this circuit in an old oscilloscope publication. With it, it is possible to observe the B...