| 摘要 |
<p>PROBLEM TO BE SOLVED: To simplify displaying, to improve recognition by a user, to miniaturize a device and to improve economy and execution by providing a voltage detection circuit in a manual or PC output, thereby outputting a signal associated with an output condition so as to cause a 2-color LED to emit a light and performing displaying for recognition according to color. SOLUTION: A voltage detection circuit 1/2 for detecting the voltage of a manual output signal/PC output signal is provided, and an output voltage Q1/Q2 is produced according to the detected voltage condition. The terminal of the output voltage Q1/Q2 is connected to the anode of a 2-color, 'red' and 'green', LED (light emitting diode), and each LED is lit by the output condition of the output voltage Q1/Q2. The output of Q1 is L when a manual output is 100V, and H when it is 0V. Conversely, the output of Q2 is H when a PC output is 100V, and L when it is 0V. Thus, displaying performed based on the color change of one 2-color LED.</p> |
