Driving Meanwell ELN-60-48P's with Arduino

gtfcniles

gtfcniles

Moray Eel
Know this has been covered in the past and after reading a million threads I just wanted to check i'm on the right track before I start ordering bits. I'm looking to control it with an Arduino board.

Parts I have coming:

24 Cool White Cree XP-G R5 LEDs
24 Royal Blue Cree XP-E LEDs
48 Cree XP- Lenses (40 degree lenses)
4 Mean Well ELN-60-48P dimmable drivers
2 tubes of Thermal Grease

Parts Required:
£16.90 Arduino Duemilanove 2009 (http://cgi.ebay.co.uk/Arduino-Duemi...ltDomain_3&hash=item5adfc9cb95#ht_1083wt_1139)
£9.99 LCD Shield (http://www.nuelectronics.com/estore/index.php?main_page=product_info&cPath=1&products_id=12)
£5.21 Protoshield Board (http://cgi.ebay.co.uk/Arduino-proto...ultDomain_0&hash=item3f062a8c34#ht_3889wt_905)
£2.62 Real Time Chip (http://uk.farnell.com/jsp/search/productdetail.jsp?SKU=1188042)
£0.30 Watch crystal - 32.768kHz (http://www.bitsbox.co.uk/crystals.html)
£1.31 Battery Holder (http://uk.farnell.com/jsp/search/productdetail.jsp?SKU=1704228)
£3.38 Temp Sensor (http://uk.farnell.com/maxim-integra...le-digital-t-mom-12bit/dp/1187948?Ntt=1187948)

Resistors
1x4k7
2x10k
1x220R

Build it up as detailed here from Krusduino's manual:

krusduino.jpg

Once that's built up and connected load up software to it and program as required.

As I am using Meanwells and the output from the Arduino is only 5v it needs to be boosted to 10v, think i'm right in thinking I can use the following circuit (7 input is from arduino, Vin is 10v, Rf and R1 are both 10k resistors.).

opamp.png

Am I along the right lines here?

Thanks in advance.

Chris
 
Hi Chris,

I think other people using the controller with meanwells used a seperate 10v power supply for the MOSFET driver instead of the 5v from the arduino.
 
There should be some info in the controller thread. I think its just a case of connecting a 10v power supply directly to the mosfet chip instead of the 5v from the arduino. Might be worth pm'ing someone thats built the controller for meanwells to double check.
 
That looks correct, at home I have my notes on how I did it and the information I pulled from Davross' thread on d4danger suggested.

Im not sure what the need is for the resistors between ground and voltage converter.

Imp
 
Im planning on using a regulated 10v power supply for the arduino and taking a wire from the Vin on the board to the V+ pin on the 7667 chip.

I read this on davross' controller thread so I hope it works. Just need to find the power supply!
 
As a temporary measure to operate the lights could you just wire it up to a 1-10v variable powersupply on a timer, and dim as required?
 
Hey,

I can chip in what i did:

I used a 9V regulated PS in to the Arduino then from i used this as the rail voltage for the Op-Amp (as suggsy suggests)... this gives me a 0-9V output for the meanwells, it does mean im missing out on a little bit of high end power output BUT to be honest its still beaches sps's from MH tanks unless there below 10" from the surface... so im not tooo disappointed.

I did look at using a 12v input to the arduino and a 10v low drop voltage regulator but a. it was a pain finding a low drop which operated at only ~2v and b. i was advised that the arduino ran hot on its regulator when few 12v which is something i DID notice when i was powering it with 12v... so i erred on the side of not cooking the regulator (mine did not have a heat sink on it, if your arduinos reg does you should be ok)

If anyone finds a reliable 10v regulated supply please let me know :D

Cheers

AJ
 
Chris,
If I may make a small observation on your proposed circuit, as AJ touches on, you may have a problem with regulation as the difference between the input and output voltage on your 317 regulator is only 2 volts. This is a bit close to the limit. You may find one device works, and another one doesn't.

If you could get your 12 volt regulated supply upto at least 13 volts you would be better off.

However, that said, there is a small error which may work in your favour. Using the resistor values you have stated, you will only get about 9.6 volts, this could be just enough to overcome the problem, but you won't be able to reach the full 10 volts into your Meanwells. However, as AJ has again commented on, that may also not be a problem.

The summation of this is, your working a bit on the limit, and it is really within component tolerances whether it will work.
 
Hey,

twin_sisters is bang on this, it was RIGHT on the limit of the spec sheet even for the low V drop regulators and i just didn't feel that the components would give me the voltage i wanted unless i was lucky... the other option i looked at was a zener diode (sp.?), but by this point i had it up and running at 9v and i was too busy messing with the color balance :D..

AJ
 
Sorry been a bit busy putting together the tank bits lol.

I'm going to have to look at this again when I get my LEDs hopefully this week, will probs do it how you did it AJ.
 
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