2003 Honda S2000 DRL

Hi guys,

I need some information, I am planning on installing drl on a 2003 Honda S2000. (canadian law requires it)

I did a search and I found a great "how to" on this drl install. here it is : https://alavigne.net/Motorsports/FeatureReports/S2000/DRL/index.jsp  <----A very big thank you to Andrew.

Here is the diagram . https://yfrog.com/iyschematic2regularj

Description of what this Hamsar 45060 : reduces the highbeams by 60%

I am having a hard time finding this hamsar 45060. So I thought if I can get the resistors value, all i have to do is put it on pin 30 (of the hamsar 45060) and can use a regular relay

thanks

I am sure there is a formula out there, but I am no good at calculating . The highbeam are 55 watts.

-------------
Testing is the key

Strange that the Law is retrospective.

But that module is not a resistor - it is a dimmer - a MOSFET or similar set to (say) 40-50% duty cycle.

But if you want to use a 50W - 100W resistor that may compromise halogen lifespan (undervoltage/undertemperature), we can continue down that path....
Though if the GNDs ca be isolated,it may be better connecting the 2 highbeam bulbs in series...

Otherwise a PWM circuit as below but set to 40%-60% duty cycle feeding a 20-80A MOSFET or two....

Now I am really lost! I have no idea what you wrote.

I think trying to find that relay looks like my only option.

-------------
Testing is the key

A relay to do what - connect the two driving lights in series?

Or connect a 50-100W resistor?

The Hamsar is not a resistor.

Basically I am trying to do is LOWER the intensity on the hight beams   https://alavigne.net/Motorsports/FeatureReports/S2000/DRL/index.jsp

I would like to know what I use to reduce the power on the high beams by 60%, to make them look like drl. The high beam are 55watts bulbs

thanks

-------------
Testing is the key

Let's cover some basics....

Dimming of halogens is NOT proportional to voltage (unlike tungsten and incandescent bulbs). Hence 60% dim = 40% brightness may mean 60% of full rated voltage.

HIDs cannot be dimmed by dropping voltage.

I doubt that you would have to retrofit DRLs in a locally approved vehicle, but being a simple safety feature the law may be retrospective.

To dim your halogens or HIDs, you need a circuit that switches on and off quickly - aka a PWM circuit. However, HID supplies may not tolerate such switching. (Those with real ballasts are probably ok.)

You could try a 50% duty cycle multivibrator made from transistors, 1 or 3 inverter gates etc.
Or you could use the 555 circuit above which is settable from 0.1% to 99.9$ duty cycle (on time to off time) to dim LEDs, fluorescent lamps, etc. For a fixed duty cycle, R1 & R3 could be changed and the pot R2 omitted. The Rout is connected to a MOSFET of 20A or higher rating that grounds or powers the beams.
BTW - this switching is fast - like a few hundred or or several kilo Hertz. It cannot be done with relays.

Or you google and find a link like hamsar...ProductType=Electronics etc. (Again - note the "solid state" labels - they are NOT resistors. Nor will they merely reduce voltage.)