Abstract: An inductive component includes: a ferromagnetic core; a coil made of aluminum and having a winding portion wound around the ferromagnetic core for a predetermined number of turns, and two extending portions extending respectively from two ends of the winding portion; and two terminals made of copper. Each terminal wraps around a respective one of the extending portions.

Abstract: A tire pressure detection device is composed of a housing, a washer, an air valve, and a lead-wire antenna. The tire pressure detection device can be installed in an interior side of a tire to detect the tire pressure and temperature in time. In addition, this kind of information is transmitted to a receiver for determination, through the lead-wire antenna. The air valve is provided with a dual function of the transmission antenna and the air valve of tire, and the tire pressure detection device is integrated into one body by using an injection molding method. Furthermore, the tire pressure detection device can be replaced for a different rim, so as to achieve an all-round installation.

Abstract: An electronic floating mark for fishing having a light indication includes an indication lamp capable of displaying two distinct indications, a control circuit board coupled to the indication lamp for controlling transition of the indication lamp between the two indications, a pair of batteries, a magnetic reed switch capable of being in a conductive state and a non-conductive state, a system of magnetic rings moving with respect to the magnetic reed switch responsive to activity of a fish. The indication lamp is initially in a first indication state (green). When the floating mark has been immersed into water and the magnetic reed switch has been switched into a conducting state, the indication lamp is put into a second indication state (red). In another embodiment, the first indication state requires the floating mark to be immersed in water.