取一只废旧起辉器,拆下铝壳,剪去电容,轻轻砸掉双金属片外的玻璃泡,使双金属片仍留在起辉器底座上。用细长铜丝把座与电池、电铃、小电珠串联成电路,如右图所示:调节动、静触头A、B的距离,当用点燃火柴的火焰靠近金属片时,A即膨胀与B接触,电路接通,灯亮且铃响。使用时,用两根长 Take a scrap starter, remove the aluminum shell, cut off the capacitor, gently smash the glass bulb outside the bimetal, the bimetal remains in the starter base. Use slender copper wire to connect the base with the battery, bells and small beads into a circuit, as shown in the picture to the right: Adjust the distance between the moving contacts A and B and expand the distance A when the flame that ignites the match is near the metal sheet Contact with B, the circuit is connected, the light is on and the bell rings. When used, use two long