Light dimmer

Which part of the world is it that mandates drl's

yes, for that setup you need to use a P channel mosfet like IRF9540N (avail from jaycar) the brightness control will then work in the opposite direction, but that can be corrected by reversing the connections to it.

NE555 is not designed for automotive applications. it will probably not survive a load dump.

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Nedavno F Murtz napisa:

Serbia. All vehicles must have drl's or dipped beams on from 01.01.2010.

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Why complicate things. You can buy a pair of high intensity LED automotive lights for a small price.

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Nedavno qmod napisa:

Even simpler. I connected low beams via unloader relay, but wehere is the fun in it?

I want to use high beams at ~50% intensity as drl's. And I want to keep the original look of my BMW without additional bumper mounted lamps.

What would be ideal is dual H1 bulb, similar to the 21/10W bulbs that are used as tail / brake light at the back. I think that new VW Golf has it, its 55W/19W, but it is not H1. Does something like that exist?

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Nedavno Yvan napisa:

Here is H15 60/19w:

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Nedavno Jasen Betts napisa:

Like this:

Can you explain this a bit further? What do I need to change? Ad one LM7812?

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Why is Serbia so far behind the times. Most other countries have worked out statistically they do nothing except waste fuel.

Nedavno F Murtz napisa:

Because of corruption at all levels, "experts" that have no idea what they are doing... Unfortunately I can go on for a long time here...

There was a lot of misleading information on TV, newspapers, and even the new regulations started on December 10th there are still unfinished parts, so noone knows what to do.

Someone probably copied regulations from some EU country from few years back.

Sadly everything is aimed at the average driver, but if, for example, you hit a pat hole and damage your car, it is your fault, you were driving to fast. You can take responsable company to the court, but that is few years long ordeal that you do not want to go trough.

But this is not the NG for this...

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You could just use your low beam. The amount of power you save is actually minuscule and will probably never pay for the electronics.

A BUZ60 should work fine as a substitute for the MTP3055E. To protect the 555 you will need at least a resistor and 15v zenner diode. A 7812 might not work so well - it will need the same type of protection as the

555.

7812 is good to about 40V input. load dump can go over 100V so no, also 7812 is a positive regulator, and to drive mosfets you want to be conected directly to their drain terminal and a 7812 would ruin that, a 7912 would work but still 40V would kill it.

perhaps something like this:

"+12"------------------+---------------- to 555 pin 8 | _|_/ // \ -+- 15V zener | +--[1K]------+ | |B | --+== MJE350 | / |\ ground ---+-|

If you could insulate one of the sockets from ground you could use a DPDT relay (or a pair of DPSTs) to switch between series and parallel connection of the lamps.

if the two adjusting screws go into plastic inserts you may only need to insulate the remaining mounting screws, perhaps using the plastic bushings from a TO3 transistor mounting kit, perhaps using automotive body putty.

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Nedavno Jasen Betts napisa:

It is cold here, and I was looking for something to do inside the house :-)

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OK, thank you.

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