42v LED dimmer

[the cosmic gate]

Want to use this circuit ( https://www.mysensors.org/build/dimmer) for dimming the Philips LED we have above the table. But the 230 adapter they use gives an output at 42 V . Whats the easiest way to use this "sensors" with this Philips LED light ?

[Sweebee]

The example you posted uses a irlz44n. According the data sheet it can handle 55v, so that should work. To power the arduino you can look for a stepdown module.

[the cosmic gate]

But maybe the arduino input on the RAW ports ?
I think i need some Step Down dc-dc convertor for this

[sundberg84]

@the-cosmic-gate said:

But maybe the arduino input on the RAW ports ?
I think i need some Step Down dc-dc convertor for this

Yes - you do. Ardunio can handle 12v on raw (in best cases - clones can fry).

[the cosmic gate]

@sundberg84 said:

@the-cosmic-gate said:

But maybe the arduino input on the RAW ports ?
I think i need some Step Down dc-dc convertor for this

Yes - you do. Ardunio can handle 12v on raw (in best cases - clones can fry).

Thnx , thnx the layout would be different. Because the LEDs needs 48v

[TheoL]

I fried a ProMini 3.3V while putting 12V on the raw pin. I suggest you add some power regulator and feed the Arduino with no more than 9V. Better safe than sorry.

I'm lucky I can still feed the ProMini throught the FDTI pins, but it's not ideally.

[the cosmic gate]

@TheoL said:

I fried a ProMini 3.3V while putting 12V on the raw pin. I suggest you add some power regulator and feed the Arduino with no more than 9V. Better safe than sorry.

I'm lucky I can still feed the ProMini throught the FDTI pins, but it's not ideally.

aaai frying one would cost you €5 :) i already ordered some power regulators to set the input on this raw ports.
But the re-think the design a bit

[TheoL]

@the-cosmic-gate I think I order 5 ProMini's for around 8 dollars. So the damage wasn't too big ;-)

[emc2]

I'm in the process of building a 34V LED dimmer (waiting for my dirtypcbs to be delivered). I'm doing a 34V -> 12V (I plan to also control a 12V cpu fan) -> 3.3V

I've been using http://www.mouser.com/ds/2/281/dms-78xxsr-47233.pdf (12V version) on my breadboard but 5V and 3.3V versions are also available.
These modules are awesome, no heat, very stable, well filtered, available on mouser for ~$9. Usually overpriced on ebay (~$30)
Technically the datasheet say it should be able to handle 40V for low currents even up to 45V maximum.
If you only power the arduino / radio this step down module at 5 or 3.3V may be a good option for you.

Another option is http://www.ebay.com/itm/3-Terminal-12V-1A-Switching-Voltage-Regulator-Power-Supply-/251971614470
I bought 2 of these to be on my final PCB. Max is supposed to be 40V but it may be worth testing at 42V. Seller is the maker, he is very friendly and should be able to tell you if 42V is fine.

[the cosmic gate]

i just recieved the voltage regulator and tried it without result :(
The LED light i;'ve got lphilips InStyle

In the spec's i read that i have to use for dimming : phase cutting dimmers , that's something different the PWM i think ;S ?

Is there oneother solution i can try / use ?

[boozz]

@the-cosmic-gate
That should be a leading edge (Triac based, relatively cheap) or trailing edge (expensive) dimmer I suppose.

a leading edge dimmer is discussed in this thread: https://forum.mysensors.org/topic/3953/4-channel-ac-dimer/2

Is there anyone here that combined a mysensors-sketch with a trailing edge dimmer?

BR,

Boozz