| 摘要 |
<p>PURPOSE: An apparatus for verifying a lighting-up indication of a lamp is provided to increase the discriminating power by providing a circuit for a separate lighting-up indication on a switching unit. CONSTITUTION: A lighting-up indication apparatus is comprised of a switching circuit(1), a lamp(2), a Zener diode(5), and a lighting-up indication lamp(3). Where the switching circuit(1) is turned on, the lamp(2) is lighting-up and simultaneously AC(Alternating Current) voltage and current are applied to a bridge diode(6) that is connected in serial to the switching circuit(1). The AC voltage and current is converted into a DC(Direct Current) voltage and current by the bridge diode(6). The lighting-up indication lamp(3) is turned on to indicate the lighting-up of the lamp(2).</p> |
