Many car owners are faced with such a problem as the passing light bulbs, because now you have to drive with the dipped lights on both day and night, then the lamps began to burn out more often than before. And all because the lamps are supplied with voltage from the generator of the machine 13.5-14.5v. Hence the frequent burn-out of autolamps. I improved the power supply circuit for low-beam lamps by putting two D-242 diodes in series on a positive power supply circuit of the lamp, for a current of 10a and a voltage of 50-100v. Thanks to this scheme, it was possible to reduce the voltage of the vehicle's on-board network from 14.5v to 12v. Here is a diagram homemade.
To do this, we need the following materials and tools:
4 diodes D-242, automotive wires with a cross-section of 1 mm, 2 automotive connectors "Mom", electrical tape, solder, soldering iron, wire cutters, pliers, tweezers, cambric. We assemble as follows: Step 1: Check the health of the diodes with a multimeter.
To do this, turn on the device in the resistance measurement mode at the 2000th, connect the red probe of the device to the diode anode, and the black probe to the cathode. The device should show a resistance of about 450-470 ohms.
Now we swap the probes, there should be 1 on the device.
This means that the diode is working. If it shows 1, or 0 in both cases, then the diode is faulty. Step 2:
We solder the cathode of the diode D1 with the anode of the diode D2 with a wire of the same cross section, which is connected to the lamp, 3-5 cm long. We solder a 10cm long wire to the D2 cathode, at the second end of which there is a Mama automobile connector. Step 3: we wrap the diodes with two layers of electrical tape so that the diode cases are not shorted to the car body. Step 4: connect the homemade lamp to the low-beam H7 lamp. To do this, disconnect the positive wire from the H7 lamp and connect it to the "Anode" terminal of the D1 diode. He just comes to this conclusion of the diode. and connect the connector going from the cathode D2 to the H7 lamp. Diodes fit easily under the back cover of the headlamp housing. There are two such homemade products. We put one on the left headlight and the other on the right. Instead of diodes D-242, A, B, diodes D-243, D-245, D-246 are suitable. I put this homemade product on my Niva-Chevrolet in May 2016, and during this time I did not change a single lamp. And before that, 3-4 lamps burned out during the season. And this, excuse me, is a big savings, since one H7 lamp costs from 80 to 500 rubles. Moreover, the light of the lamps has not changed much, but now they do not burn out. So conclude the drivers of personal cars. A minimum of parts extends the life of automotive lamps.