Is there any reason you couldn't run 12vdc through a dirkcheap acssr instead of 120vac? As long as the current isn't too high....
Is there any reason you couldn't run 12vdc through a dirkcheap acssr instead of 120vac? As long as the current isn't too high....
I don't think they would shut off without a 0 cross from the AC line.
However, I have created semi-DC ssr's from the DirkCheaps. See:
http://www.diychristmas.org/vb1/show...ighlight=dcssr
Requires a slightly modified firmware for the controller though.
Dan Kulp
You can't use AC SSRs to control DC for the reason that dkulp stated.
Phil
Ok... I just stared at the schematics and researched further and now I think I understand why.
I thought the on/off/dimming zero cross was only controlled by (in my case) the Ren64. But, I think I see the difference in the chips that i didn't realize before....
I think you need to take a look at the info in this discussion. It will help you understand the importance of ZC. The Ren 64 does not control ZC. It detects it and reacts to it by refreshing the SSR.
http://doityourselfchristmas.com/for...des+rectifiers
2020 Full sized show reworked for the new location. Only adding (famous last words) 13 RBLs that I finally got converted to using pixels
2019 - Just moved into a new home (yet another change of plans). Will be dim but not dark. Too much to do at the new place to leave time for a show. Dim show (3000 pixels) had regular visits most nights.
https://www.youtube.com/channel/UCyX...ttrsZNARkUce0Q
Hey Dirk, is there a plan to make a DrikCheap DCSSR?
I'm not clear what's being asked here? The DirkCheap SSR is cheap because it doesn't use a large TRIAC for the output but relies on the smaller TRIAC within the opto to do the work. I don't follow the context of this for DC? Are you just asking for a smaller DC output - something like the Ren48LSD does now? The biggest cost with the DCSSR is probably the MOSFET. Or are you just asking for a smaller form factor?
[COLOR=#000080][B][I]Brian[/I][/B][/COLOR]
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[SIZE=1]2015 Halloween Show - Planning now - hopefully some house projection...
2015 Christmas Show - 5x E681-12, 1x 6804, Ren48LSD, 3x RenSS16, 1x Falcon16v2 (w/expander), 24x90 WS2811 pixel MT (James MT Strips), 12x DIYC Floods, SuperPixelStar, 3x Pixel Arches, PixaBulb House outline
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id like a board with just a single DCSSR channel on it. i have alot of dc elements that only need 1 channel and 2 grinchs to run them.
2012 - The year of the pixels
21ft tall 12x38ct WS2811 Pixel Megatree - DONE
5 36ct GECE Pixel Archs - Maybe
Pixelated roofline with windows - DONE
Bigger matrix and pixel star - DONE
Added 1200 pixels, a few strobes, and fast tubes
Now it just all has to play nicely lol.
[url]http://www.facebook.com/FiedlerFamilyChristmas[/url]
[URL="http://www.facebook.com/OhioChristmasDisplays"]http://www.facebook.com/OhioChristmasDisplays[/URL]
Probably a smaller form factor and hopefully cheaper DC SSR. My "hack" to the dirk cheaps uses a transistor, but that requires customer firmwares on the controllers and also doesn't provide any isolation. I was thinking of trying to experiment with sticking an opto-fet or opto-transitor. Either option would use roughly the same form factor of the DiskCheap. Obviously a much lower current that the full DC SSR (likely around .4A per channel looking at some of the specs), but for a lot of applications, that's probably enough.
Dan Kulp
I haven't seen where isolation has been that important for DC controllers - - there are 300+ Ren48LSD's out there representing over 14,000 channels and have never seen a case where the high load power somehow got back through the PIC, back through the RS485 chips and back to the PC - ever. It would be easy to just recreate the output portion of the Ren48LSD - it would still require the flipped outputs, etc as you do today if using a Renard non-SSR controller or even with an Arduino type output. Breadboard out with some cheap transistors and 470 ohm resistors - done...
[COLOR=#000080][B][I]Brian[/I][/B][/COLOR]
[COLOR=#ff0000]Christmas in San Jose! - [URL="http://www.christmasinsj.com"]WEB[/URL] - [URL="https://www.facebook.com/ChristmasInSanJose"]FB[/URL] - [URL="https://www.youtube.com/playlist?list=PL1W78s7liEQEE0ed7WSyLF7B6j3lBX43w"]VIDEOS[/URL]
[/COLOR][COLOR=#800080]Halloween in San Jose! - [URL="https://www.facebook.com/pages/Halloween-in-San-Jose/356280784428581?ref=tn_tnmn"]FB[/URL]
[SIZE=1]2015 Halloween Show - Planning now - hopefully some house projection...
2015 Christmas Show - 5x E681-12, 1x 6804, Ren48LSD, 3x RenSS16, 1x Falcon16v2 (w/expander), 24x90 WS2811 pixel MT (James MT Strips), 12x DIYC Floods, SuperPixelStar, 3x Pixel Arches, PixaBulb House outline
[/SIZE]
[/COLOR][SIZE=3][COLOR=#008000][I]Ignorance is Temporary [/I][/COLOR][COLOR=#800080][I]- [/I][/COLOR][COLOR=#ff0000][I]Stupidity is Forever[/I][/COLOR][COLOR=#800080][I]...[/I][/COLOR][/SIZE][I][COLOR=#ff0000]
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