| 摘要 |
<p>PURPOSE:To aim at safety driving in making a driver check the burnout of one lamp by detecting the one lamp burnout of turn signal lights being set up in an automobile or the like in use of plural numbers of semiconductor switches, etc., and thereby changing each flashing period of these turn signal lights for warning. CONSTITUTION:When a switch (g) is closed, a current flows into a condenser 6 and each of diodes 4, 5 from a battery 1 via respective turn signal lights 2, 3, and thereby a power circuit (a) consisting of a resistor 7, a condenser 8 and a Zener diode 9 operates At this time, if either of these lights 2, 3 is down, a difference occurs in each voltage drop of respective switches (e), (f), this voltage differential occurs in a voltage being divided by respective diodes 34, 35 and resistors 33, 32. Accordingly, if each of resistors 29, 31 and a diode 30 are set so as to cause output of an amplifier 28 to become a low level, a transistor 25 comes ON, thus the reference oscillation of a circuit (c) is changed. With this constitution, each flashing period of these switches (e), (f) is changed, warning the burnout.</p> |
