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Homemade, extending the life of car lamps


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.

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15 comments
R555, comments can be corrected only for some time, about 5 minutes, did not count. Then this button disappears.
Yes, there is an opportunity on the site to correct your comments. For this you need, at a minimum, to get into the group of authors and journalists.
Guest Vladimir
I apologize for being thoughtless. I posted a comment, forgetting that the author had in mind the head light, and I "small" lamps. I don’t know if it’s possible to make corrections on the site or delete my comments.
Guest Vladimir
I thought: after all, on a 12V stabilizer, it would be cheaper, although a bit more complicated. But, if the diodes are a bag and have nowhere else to put it, then you can.
Guest Vladimir
Perhaps you should try and evaluate the quality of lighting in the dark. I have when moving the cramp to the side. network 14.2-14.3 V.
The wind is playing in the neck of a jasper vase ...
The bag is lonely .....


P.S. I, too, smear paetit and filasofit !.)))))
*** Poetry deleted ***
And they will shine 2 times less. We need workarounds. Relay. Why bother the city. A working lamp shines endlessly. Just change what has become black.
The idea deserves attention for daytime running lights. But when driving at night, these a couple of volts will eat up to 20-25 percent of the light. It would be necessary to put a relay for shorting these diodes at night.
This is not normal, you need to watch, with the gene,

Or with mounting reflectors ... Or the headlights themselves ...
The light does not "tremble" on rough roads ???
It happens ... The spirals in the lamps just "shake off" ...
This, however, before the first inspection, but you never know ... In Ukraine, they say, they don’t have any ...
3-4 lamps per season? This is not normal, you need to watch what’s with the gene, until something more seriously burned out. My lamps burned like this when the alternator belt was damaged. The voltage in the network was pulsed, the belt slipped in a certain area.
Thanks to this scheme, it was possible to reduce the voltage of the vehicle's on-board network from 14.5v to 12v.

What kind of nonsense? The voltage of one can of lead acid battery is 2.2 V. The battery has a total of 13.2 V. To charge the battery, the generator must supply 13.2-14.5 V.
A car incandescent lamp has a "lifespan" of about 1000 hours. On average this comes out a year, with a slight +/-.
Respect! Despite all the splendor of the current services, there are still people who work with their heads and hands.
Also the lamps are constantly on, I will try
The effect will certainly be. You can increase the mechanical reliability of the product by placing the diodes in heat shrink and wrapping them with a piece of foam so that they do not hang inside.

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