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1.制作:用漆包线,在一个13cm×18cm的长方形金属盒上绕制约150匝的长方形线圈两个,退下后用彩色塑料薄膜把每个边缠紧,两头留出20—30cm长的线,以便接在电路里。漆包线的线径,线圈的大小,匝数的多少,没有严格的要求,可以就地取材。但线径以0.3mm—0.6mm为宜,匝数越多,边越长,效果越好。 2.演示:把两个线圈的底边靠拢,放在桌面上,线头吊在支架上,使上边
1. Production: Using enameled wire, in a rectangular metal box of 13cm x 18cm around two rectangular coils constrained by 150 ,, after retire with colored plastic film to tighten each side, leaving two lines of 20-30cm long To connect in the circuit. The diameter of the enameled wire, the size of the coil, and the number of turns, there are no strict requirements, you can draw on the spot. However, the diameter of the wire is 0.3mm-0.6mm. The more turns, the longer the edge, and the better the effect. 2. Demonstration: Bring the bottom edges of the two coils together and place them on the desktop. Hang the thread on the bracket so that the top