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covewi
10-16-2009, 03:16 PM
I am looking for some help with a dcssr board. Many have replied and responded to PM's.

Thanks

What is the voltage and amps out of the 8 dcssr board?
I need to be able to get 8-12 volts out (min) and supply 1000-1400 ma.

Would this be possible with this board - could it be modified to do so with new voltage regulators.

Any help?

Thanks

budude
10-16-2009, 04:07 PM
RPM can discuss his 8-channel DMX DC controller (assume you mean the DMX version)...

As for the 4-channel non-DMX version - from the Wiki - http://doityourselfchristmas.com/wiki/index.php?title=4_Channel_DCSSR_Assembly_Instructi ons

It says the following:

The DCSSR is designed to switch DC loads between 0 and 30 Volts. The MOSFETs are rated to great than 10 Amps each, however as fitted to the PCB, I would limit to individual channel load to 2 to 3 Amps max. A suitable heatsink will be required.

You can get the boards from wjohn or you can etch your own from LabRat's layout here - http://www.doityourselfchristmas.com/forums/dynamics/showentry.php?e=36&catid=8

covewi
10-16-2009, 11:38 PM
I might be starting to understand.

A Renard 24LV would control the DcSSR board.

The supply voltage into the DcSSR is the voltage out.

The DcSSR would just switch the 0-30 volts on and off.

Vixen would control everything

Questions:

Does the Renard output the voltage to the DcSSR board or just a signal?

I would supply my needed voltage of between 8-12 volts to the DcSSR board.

budude
10-16-2009, 11:48 PM
You pretty much got it! The Ren just supplies the logic signal to the optoisolator which in turn triggers the MOSFET on which switches the main DC. 8-12V should be fine but not too much less as there is a voltage regulator for the optos and it doesn't like going too much lower and still be stable.

covewi
10-17-2009, 07:37 PM
I have been looking at the specs for the Ren 24 lv... it only allows 500 ma of output per channel. Is there a schematic for the board?

Is it possible to exchange parts to adjust the ma output.

Is there a simple 8 min channel control board that I could use with a DCSSR board?
Because I would feed 12-24 V to the DCSSR and adjust the ma's after the boards outputs to my ma requirement.

Thanks

budude
10-17-2009, 09:40 PM
It's actually probably less than 500mA - it uses ULN2803 drivers which have a single channel output of 500mA (some vendor specs recommend 400mA max) but if you look closer at the specs for it, it only allows ~125mA per channel if all 8 outputs are enabled at the same time. The outputs can be tied together to increase the current sink but to get to 1A+ it's probably not the way to go...

So - - for your case - as you surmised - it's not going to work for your setup directly. However, it can drive a regular DCSSR also. You might want to ping Frank directly for other options - he may have used it for similar projects.

LabRat
10-18-2009, 10:19 AM
I have been looking at the specs for the Ren 24 lv... it only allows 500 ma of output per channel. Is there a schematic for the board?

Is it possible to exchange parts to adjust the ma output.

Is there a simple 8 min channel control board that I could use with a DCSSR board?
Because I would feed 12-24 V to the DCSSR and adjust the ma's after the boards outputs to my ma requirement.

Thanks

Are you comfortable with the notion of etching your own board? The "SIMPLE REN16" layout/schematic is available, and there are three of four of us on here that have etched these.

Simple REN16 discussion (http://doityourselfchristmas.com/forums/showthread.php?t=7193)

Home etching isn't nearly as difficult as it sounds, but I realize it's not for everyone.

covewi
10-18-2009, 03:10 PM
Etching No Problem - is the board still surface mount?

Can I use your LabRat - dcssr board with this?

The voltage regulator looks like it is 5 v - if I have this correct only a control signal goes out of the Simple Ren 16 to the DcSSR board. I can then supply whatever voltage I need to the DcSSR board as long as I feed the opto's correctly.

By doing this I could then set my milli amps at the DCSSR outputs to what I need with a simple circuit for each output. (since the 5w leds all require different ma). Sound okay so far.

Is there a parts list for the Ren 16 and pdf file for the boards?

Is the parts list for your DCssr the same as the other board in the forum - just a different layout?

Is there firmware available and will Vixen still work?

I know a lot of questions - Thanks again.

budude
10-18-2009, 03:31 PM
You can use LabRat's DCSSR with the Ren16 - in fact I am running 16 of them to my four Ren16s to drive my LED RGB Strips. Don't worry abou the voltage regulator - it supplies juice from the supply side to the optoisolators - as long as you're between the voltage range indicated previously it will be OK. I am using mine with 5V source and jumpered out the regulators since my source is a well regulated supply to begin with. The regulator is not in the path to the 4 outputs.

LabRat also has his own spin on the Ren16 layout - it's very etch friendly (single sided) or I can send you mine which is the orginal scorpia design with minor changes to make it a bit more friendly for home etch/drilling (larger pads, thinner traces between PIC pins, etc) and I removed the power jack and stuck with the screw-in block. I've built at least 10 of them and they work great. The only minor point that needs to be made about these is that there is limited support for them since they aren't an "official" controller on this site.

The DCSSR parts are the same as the CoOp BOM - I've used it for some of mine.

There is firmware provided by P Short (Phil) and scorpia (Peter) which I've been using also. It's based on the same Ren FW on the regular controllers but modified to use 16 ports versus 8 (the Ren 16SS and 24SS are really 2x or 3x Ren8SS). You can modify the code to support active High/Low output and PWM or not. You will need a PIC programmer - I'd suggest either the PICKit2 or PICKit3.

My setup is shown here which uses all of the above: http://doityourselfchristmas.com/forums/showthread.php?t=8163

RPM
10-18-2009, 06:21 PM
My DMX DC SSR design is rated for 12-24 DC input and 1.25A output per channel. The actual single channel capability is higher, as I spec 10A Mosfets, but the overall board limit is 10A.
Here's the link http://doityourselfchristmas.com/forums/showthread.php?t=8340

Robert


I am looking for some help with a dcssr board. Many have replied and responded to PM's.

Thanks

What is the voltage and amps out of the 8 dcssr board?
I need to be able to get 8-12 volts out (min) and supply 1000-1400 ma.

Would this be possible with this board - could it be modified to do so with new voltage regulators.

Any help?

Thanks

covewi
10-18-2009, 07:57 PM
You have probably wondered what I am trying to do. Here are some links to the laminar fountain I made this summer. The arch is 7 feet high and 13 feet in length.

http://tinypic.com/view.php?pic=2i113cg&s=4
http://tinypic.com/view.php?pic=vmvt4y&s=4
http://tinypic.com/view.php?pic=29p7otv&s=4

The stream is currently lit by a 3W LED with PMMA solid fiber optic cable.

This winter I am upgrading to 5W LED and control - you know
Bellagio in Illinois.

Thanks for everyones help - Now just to decide which route to take - simple ren 16 or DMX?



Thoughts?