| 摘要 |
PURPOSE:To simplify the operation of an electronic switch for sure operation by turning on or off an optional selecting switch so as to light an LED corresponding to the switch and extinguishing other LEDs being lighted. CONSTITUTION:The selecting switches CS1-CS4, AND circuits N1-N28, OR circuits L1-L8, 01-08, light emitting diodes LED1-LED9, and an LED control circuit LC controlling the lighting are provided. The system is so designed that a prescribed signal is outputted from output terminals 12a and 12c by turning on or off an optional selecting switch, e.g., CS1 or giving a signal to an optional terminal among signal input terminals Z1-Z9, e.g., Z1. When the corresponding LED1 is lighted by turning on or off an optional switch, e.g., CS1, the other LED2-LED9 are extinguished. |
