LED Full Spectrum Controller based on Mega2560 board

kapelan · 10/05/2013, 08:21 PM

8 Channels LED controller based on Arduino Mega2560 with 3.2" TFT touch screen panel.
Always was thinking to control spectrum of the light to avoid algae problem.
With LED it's easy to do.
This device was designed for full LED spectrum control. Level of each channel can be adjusted 0-100% of LED power.
This project try to focus on:
1. "As cheap as possible", and it looks like it is, please see bellow.
2. Easy to build as:
- get parts
- load software
- enjoy

Video of working controller

Download the latest version from here
Software: loader and .hex file for arduino
There are 2 files: one for ILI touchscreen another for ITBD

Main screen:

LED level setup screen

Doser setup screen

Average cost of the project:
Arduino Mega2560 = $15
TFT 3.2" = $10
Shield between arduino and TFT = $10
----
Minimum configuration that will work: $35

With drivers, power supply + box about $150

rott · 10/05/2013, 08:46 PM

looks very nice where did you get the box for the controller

also where did you get the board with all the drivers on it looks like the driver board plugs in to the mega?

SUMMERS · 10/05/2013, 09:32 PM

Me likes very much. Can we see a picture with the tft removed? Are you worried about heat build up with the psu on top of each other?

kapelan · 10/05/2013, 10:14 PM

That's a sandwich:
Arduino + Shield + TFT
All drivers are on the shield
View from bottom:

Front panel laser cut from transparent acrylic.
Back panel laser cut from stainless steel.
Box from ebay.
No hot places on these boards.
Drivers are also cold.

kapelan · 10/05/2013, 11:34 PM

Configuration controller video

asid61 · 10/05/2013, 11:42 PM

Looks good. But when you spent the money on a PCB with drivers, why not just use a TI chip to make it into a 16-channel 12-bit controller instead of an 8-channel?

kapelan · 10/05/2013, 11:49 PM

Quote:

Originally Posted by asid61

Looks good. But when you spent the money on a PCB with drivers, why not just use a TI chip to make it into a 16-channel 12-bit controller instead of an 8-channel?

which TI chip?
I remember one chip for 16 channel LED array but it supports current 50-300mA or so. That is definitely not enough.

asid61 · 10/06/2013, 01:37 AM

Quote:

Originally Posted by kapelan

which TI chip?
I remember one chip for 16 channel LED array but it supports current 50-300mA or so. That is definitely not enough.

You wire the PWM signal coming out of the chip to the PWM input of the led driver; you don't use it to drive the leds directly.

The TLC5940 is what I'm thinking of. AdaFruit sells a board for it.

kapelan · 10/06/2013, 11:23 AM

bunch of boards means bunch of connections and wires.
This design is good for temporary testing.
For permanent solution it must be only one board.

asid61 · 10/06/2013, 04:37 PM

Quote:

Originally Posted by kapelan

bunch of boards means bunch of connections and wires.
This design is good for temporary testing.
For permanent solution it must be only one board.

You can still buy the chip on digikey and stuff. I just didn't want to link to a datasheet.

kapelan · 10/07/2013, 05:05 PM

Software screenshots:

All objects are touchable

utube

kapelan · 10/17/2013, 07:35 AM

I'm thinking about improving this device and add PH and ORP control.
this is the project of main screen:

PH and ORP will be flashing, like 3-5 seconds display ORP and then 3-5 seconds display PH level.
PCB can be ordered minimum 10 peaces, and I need only one.
The size of PCB: 10x25 cm
Does anybody interested in this PCB?

rott · 10/17/2013, 07:46 AM

you also hand made the driver's to right?

kapelan · 10/17/2013, 07:58 AM

Drivers on board - last picture from the topic.
Board will be the same size with everything on it:
- timer
- 8 drivers
- ORP
- PH
Just reorganized for ORP and PH chips

sasalone · 10/17/2013, 12:31 PM

Quote:

Originally Posted by kapelan

I'm thinking about improving this device and add PH and ORP control.
this is the project of main screen:

PH and ORP will be flashing, like 3-5 seconds display ORP and then 3-5 seconds display PH level.
PCB can be ordered minimum 10 peaces, and I need only one.
The size of PCB: 10x25 cm
Does anybody interested in this PCB?

I might be intrested in one or two boards. Can you publish the code in a non hex format and also the BOM for the boards so I can see how much the assembly will cost.

kapelan · 10/25/2013, 10:18 PM

all elements: resistors 10kOhm SMD 0805
Gereber files PCB

marinho · 11/06/2013, 10:56 PM

do have one extra pcb you want to sell

zachts · 11/07/2013, 06:47 PM

Very nice!

Have you had it running full power yet? As someone else asked aren't you worried the PSUs will over heat with no cooling of the enclosure? They are intended for free air convection not sealed in a box.....

Drivers, even the really efficient type get hot too running in a sealed box, but maybe not the 100+C needed to cause any problems as long as they don't melt something else......

kapelan · 11/10/2013, 08:45 PM

It is running on 27V 8 channels 1A each, so total it's about 200W
LEDs used mostly CREE.
Light time 7 hours.
Nothing is worm inside.
Driver can support up to 40V - for test reason I tried 36V - they are cold and working fine.
So basically device can do 40V x 1A x 8 channels = 320W.
That's a lot! The only reason I did not do it - Power Supply from meanwell costs a lot.
And chinese power supply with this voltage from ebay are big to fit the box.

kapelan · 01/18/2014, 10:56 PM

created full version, video:
http://www.youtube.com/watch?v=YFApA...ature=youtu.be

PH control
ORP control
Temperature control
Overflow (4 sensors)
8 power lines
8 led channels

bigguyuk · 01/19/2014, 04:23 AM

Nice one were did you get the PCB from ?

kapelan · 01/20/2014, 09:09 AM

PCB/schema designed by myself.
PCB fabrication from china.

bigguyuk · 01/20/2014, 09:35 AM

Very Impressed dude looks very Good

kapelan · 01/20/2014, 11:32 AM

Thank you,
I like it too

Attached BOM of the project.
Some items from digikey , some from ebay.
because do not agree with the of price from digikey

bigguyuk · 01/20/2014, 03:50 PM

Thanks Dude

10/05/2013, 08:21 PM	#1
kapelan Registered Member Join Date: May 2008 Location: Canada Posts: 159	LED Full Spectrum Controller based on Mega2560 board 8 Channels LED controller based on Arduino Mega2560 with 3.2" TFT touch screen panel. Always was thinking to control spectrum of the light to avoid algae problem. With LED it's easy to do. This device was designed for full LED spectrum control. Level of each channel can be adjusted 0-100% of LED power. This project try to focus on: 1. "As cheap as possible", and it looks like it is, please see bellow. 2. Easy to build as: - get parts - load software - enjoy Video of working controller Download the latest version from here Software: loader and .hex file for arduino There are 2 files: one for ILI touchscreen another for ITBD Main screen: LED level setup screen Doser setup screen Average cost of the project: Arduino Mega2560 = $15 TFT 3.2" = $10 Shield between arduino and TFT = $10 ---- Minimum configuration that will work: $35 With drivers, power supply + box about $150 Last edited by kapelan; 10/04/2017 at 08:55 PM. Reason: pictures are not loaded

10/05/2013, 08:46 PM	#2
rott Head zoo keeper Join Date: Nov 2005 Location: Toledo ,Ohio Posts: 710	looks very nice where did you get the box for the controller also where did you get the board with all the drivers on it looks like the driver board plugs in to the mega? Last edited by rott; 10/05/2013 at 08:58 PM.

10/05/2013, 09:32 PM	#3
SUMMERS Premium Member Join Date: Jun 2003 Location: Cleveland, Ohio Posts: 857	Me likes very much. Can we see a picture with the tft removed? Are you worried about heat build up with the psu on top of each other? __________________ With a Router and a Table saw you can make anything for your tank.

10/05/2013, 10:14 PM	#4
kapelan Registered Member Join Date: May 2008 Location: Canada Posts: 159	That's a sandwich: Arduino + Shield + TFT All drivers are on the shield View from bottom: Front panel laser cut from transparent acrylic. Back panel laser cut from stainless steel. Box from ebay. No hot places on these boards. Drivers are also cold. Last edited by kapelan; 10/05/2013 at 10:16 PM. Reason: add

10/07/2013, 05:05 PM	#11
kapelan Registered Member Join Date: May 2008 Location: Canada Posts: 159	arduino soft Software screenshots: All objects are touchable utube

10/05/2013, 11:34 PM	#5
kapelan Registered Member Join Date: May 2008 Location: Canada Posts: 159	Configuration controller video

10/05/2013, 11:42 PM	#6
asid61 Registered Member Join Date: Apr 2011 Location: Cupertino, CA Posts: 1,111	Looks good. But when you spent the money on a PCB with drivers, why not just use a TI chip to make it into a 16-channel 12-bit controller instead of an 8-channel?

10/06/2013, 11:23 AM	#9
kapelan Registered Member Join Date: May 2008 Location: Canada Posts: 159	bunch of boards means bunch of connections and wires. This design is good for temporary testing. For permanent solution it must be only one board.

10/17/2013, 07:35 AM	#12
kapelan Registered Member Join Date: May 2008 Location: Canada Posts: 159	I'm thinking about improving this device and add PH and ORP control. this is the project of main screen: PH and ORP will be flashing, like 3-5 seconds display ORP and then 3-5 seconds display PH level. PCB can be ordered minimum 10 peaces, and I need only one. The size of PCB: 10x25 cm Does anybody interested in this PCB? Last edited by kapelan; 10/17/2013 at 07:36 AM. Reason: spel

10/17/2013, 07:46 AM	#13
rott Head zoo keeper Join Date: Nov 2005 Location: Toledo ,Ohio Posts: 710	you also hand made the driver's to right?

10/17/2013, 07:58 AM	#14
kapelan Registered Member Join Date: May 2008 Location: Canada Posts: 159	Drivers on board - last picture from the topic. Board will be the same size with everything on it: - timer - 8 drivers - ORP - PH Just reorganized for ORP and PH chips

10/25/2013, 10:18 PM	#16
kapelan Registered Member Join Date: May 2008 Location: Canada Posts: 159	all elements: resistors 10kOhm SMD 0805 Gereber files PCB

11/06/2013, 10:56 PM	#17
marinho Registered Member Join Date: Nov 2013 Posts: 1	do have one extra pcb you want to sell

11/07/2013, 06:47 PM	#18
zachts Registered Member Join Date: Mar 2005 Location: St. Louis, MO. Posts: 3,259	Very nice! Have you had it running full power yet? As someone else asked aren't you worried the PSUs will over heat with no cooling of the enclosure? They are intended for free air convection not sealed in a box..... Drivers, even the really efficient type get hot too running in a sealed box, but maybe not the 100+C needed to cause any problems as long as they don't melt something else......

11/10/2013, 08:45 PM	#19
kapelan Registered Member Join Date: May 2008 Location: Canada Posts: 159	It is running on 27V 8 channels 1A each, so total it's about 200W LEDs used mostly CREE. Light time 7 hours. Nothing is worm inside. Driver can support up to 40V - for test reason I tried 36V - they are cold and working fine. So basically device can do 40V x 1A x 8 channels = 320W. That's a lot! The only reason I did not do it - Power Supply from meanwell costs a lot. And chinese power supply with this voltage from ebay are big to fit the box. Last edited by kapelan; 11/10/2013 at 08:49 PM. Reason: corrected

01/18/2014, 10:56 PM	#20
kapelan Registered Member Join Date: May 2008 Location: Canada Posts: 159	full version created full version, video: http://www.youtube.com/watch?v=YFApA...ature=youtu.be PH control ORP control Temperature control Overflow (4 sensors) 8 power lines 8 led channels

01/19/2014, 04:23 AM	#21
bigguyuk Registered Member Join Date: Nov 2011 Location: Keighley West Yorkshire Posts: 101	Nice one were did you get the PCB from ?

01/20/2014, 09:09 AM	#22
kapelan Registered Member Join Date: May 2008 Location: Canada Posts: 159	PCB/schema designed by myself. PCB fabrication from china.

01/20/2014, 09:35 AM	#23
bigguyuk Registered Member Join Date: Nov 2011 Location: Keighley West Yorkshire Posts: 101	Very Impressed dude looks very Good

01/20/2014, 03:50 PM	#25
bigguyuk Registered Member Join Date: Nov 2011 Location: Keighley West Yorkshire Posts: 101	Thanks Dude