1集成块测试笔如附图所示，取一支笔油已用完的圆珠笔，将笔芯前端的小银尖取下，用性刀挫掉顶部的圆珠，焊上一段细钢丝，另一侧焊上一条导线。拿下笔芯，截掉大约5cm，把圆珠笔的上半部从插笔芯处打一个小孔，直接把笔帽打透，孔径以能穿过导线为准，将钢尖上的导线从笔芯下 1 Integrated Block Test Pen As shown in the drawing, take a ballpoint pen that has run out of pen oil, remove the small silver tip at the front of the pen, and use the knife to frustrate the top ball and weld a piece of small steel wire. Solder a wire on one side. Take down the refill, cut off about 5cm, and insert a small hole in the top half of the ballpoint pen from the inserted refill. Drill the pen cap directly. The hole diameter can pass through the wire and the wire on the steel tip will be under the refill.