car lights monitor

21 1 car lights monitor L3 = 20turns M van Oosten Ll = 1 Burns L2 = 1 Burns Many traffic accidents are caused by failing car lights. Often, the driver is not aware of such a malfunction, because the warning lights provided on the dashboard do not, strictly speaking, monitor the relevant lights, but rather the switch position since they are almost invariably connected in parallel with the relevant car lights. The proposed circuit is intended to indicate the failure of one light in a pair: sidelights; headlights (up to 55 W); rear lights; brake lights; or fog lights. The two lamps must have the same rating. Counter-wound coils, Li and L2, carry the same current when both lamps are working correctly, so that the magnetic fields created by these cur- rents cancel one another. When one of the lamps fails, the magnetic field caused by the current through the other induces a voltage in L3. This pulse causes the TICIO6D to switch on, and this in turn makes Ds light. If both lamps fail sim...