This configuration that appears in other points of this section was obtained in a 90’s Popular Electronics. The circuit can be applied to other operational ones.
This 50's receiver includes an amplifier stage with a transistor complementary to the CK722, in...
This simple amplified relay circuit works on RF signals. The power supply is according to the...
This dimmer for the 120 V (117 V) network was found in the magazine Electronics Now of August...