| 摘要 |
PURPOSE:To turn or and off two loads simultaneously or partly, by providing means to which a signal of a prescribed duration is inputted to control turn- on and off of two stabilized power sources and control turn-on and off of one stabilized power source. CONSTITUTION:When a reset switch 9 is opened and a main switch 2 is closed, a transistor TR10 becomes conductive momently, and the Q output and the Q' output of an FF3 are at high-level and low-level respectively, and switching TRs 23 and 27 becomes conductive to make series control TRs 15 and 25 conductive, and a voltage is given to a stabilized power source circuit 14 and a Zener diode to operate loads 30 and 31. When the switch 9 is closed then, the FF3 is reset, and TRs 23 and 27 are cut off, and the circuit 14, the TR25, and loads 30 and 31 become unoperated. In this state, when an alarm output pulse from a clock circuit is applied to a terminal 7, the FF3 is set again, and loads 30 and 31 are operated together. Since the R terminal of the FF3 is low-level still, the load 30 is operated and the load 31 is unoperated only while the pulse 32 is applied. |
