| 摘要 |
PURPOSE:To simplify the circuit constitution and to make less the change in time aging, by making delay the light emitting diode through the use of electromagnetic energy and mechanical energy stored in the relay in the power application to the relay. CONSTITUTION:The relay coil 1 and the light emitting diode 2 are connected in series with the input terminals 11 and 12, and the diode D is connected parallel to the series circuit so that the polarity is madd with no input current flowing. With this circuit connection, the current i flowing to the diode 2 decreases exponentially with the time constant determined with the inductance 1 and resistance of the relay coil 1, and when the moving piece is moved, the magnetic resistance in the magnetic circuit is increased. Further, the current i is again increased from the minimum value, and the mechanical energy stored in the spring returning the moving piece makes off delay of the light emitting diode 2. The light emitting diode 2 is controlled without using the capacitor to simplify the circuit and avoiding time aging. |
