building circuit my first FM radio receiver

The purpose of the product is to give users an easy introduction to the world of electricity. Electronic module style is consistent, the interface is unified, the size is the same, can be any combination. These modules contain switches, resistors, leds, audions, operational amplifiers and other common electronic units. With these modules, a variety of circuits can be built, including radios. Circuit manual also provides a triode application circuit, logic gate circuit, self - locking circuit and other circuits.