利用舊存銅片和废电池中的炭棒做成,把旧銅片剪成兩个筒形座架(如圖),右座架下面垫一塊導板(用銅做,便利座架移動),導板则釘在木塊上,筒形口徑大小,以能插入廢炭棒为度,筒形上面各有螺釘一顆(利用舊保險盒里面的螺釘)以調節鬆緊炭棒,再在筒形座架上各連導线至接线柱(利用舊A电接線柱),右筒形座架的侧面再連一个調節器(用長約5—6厘米的螺絲釘做成,在螺釘面部用锡銲 The use of old copper scrap and waste batteries made of charcoal, the old copper cut into two cylindrical cradle (pictured), under the right seat pad pad a guide (with copper to facilitate the movement of the seat) , The guide plate is nailed to the wooden block, the size of the barrel diameter, in order to be able to insert waste carbon rod for the degree, the top of each cylinder has a screw (using the screw inside the old safety box) to adjust the loose carbon rod, Shaped frame with wires connected to the terminal (the use of the old A electrical terminal), the right side of the cylindrical frame and then connect a regulator (with about 5-6 cm long screw made of screws in the face with tin weld