We found this circuit in a 1968 Electronics World. The circuit uses a transistor of the time providing a 16 dB signal gain with a 4 V output.
This is the traditional unregulated power supply configuration with full wave rectification. For currents...
Home automation systems are becoming smarter and more connected with the launch of every new...
This simple circuit has its trigger point set in the trimpot. The transistor can be any general...