| 摘要 |
<p>PURPOSE:To utilizing a lamp to display the life of a battery by extinguishing a lamp, which is lit by a lamp control circuit at a normal state time, at a battery voltage lowering time. CONSTITUTION:In case of a normal state of a battery voltage, the battery voltage is detected by battery voltage detection circuit 7 on a basis of lamp control circuit 9, and lamp control 8 is turned on to make lighting dependent upon lamp switch 10 possible. In case of a battery voltage lowering control circuit 9 turns off lamp control 8, and the lamp is extinguished even if switch 10 is turned on.</p> |
