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View Full Version : Do you need both REN T and REN C ?



TERBObob
08-23-2008, 06:04 PM
Ok ... not sure ...
Does a person need both the REN T and the REN C , just to do dimming of an Olsen ? Not exactly sure why there are lots of people using both .

vziukas
08-23-2008, 06:11 PM
Ok ... not sure ...
Does a person need both the REN T and the REN C , just to do dimming of an Olsen ? Not exactly sure why there are lots of people using both .
For dimming Olsen you need only REN C, REN T is used to give ZC (Zero Cross) signal to REN C board. But you can supply that ZC signal using more simple sollutions like:
http://www.doityourselfchristmas.com/forums/showpost.php?p=27759&postcount=5

TERBObob
08-23-2008, 07:43 PM
Ok , now I'm confused even more than ever ...:confused:
So , the REN C needs zero cross ? And this is supplied via the REN T ? Otherwise the REN C with the Olsen will not dim ? Is this correct ?

vziukas
08-23-2008, 08:44 PM
Ok , now I'm confused even more than ever ...:confused:
So , the REN C needs zero cross ? And this is supplied via the REN T ? Otherwise the REN C with the Olsen will not dim ? Is this correct ?

Yes it is. Without zero cross REN C will not function.
Read more here:
http://www.doityourselfchristmas.com/wiki/index.php?title=Renard-595_Converter#Zero_Crossing_Signal_Options

I'm assembling REN-C and ZC source for my Grinch now.
Once it will be done I will post images on my website.

TERBObob
08-23-2008, 09:38 PM
I'm assembling REN-C and ZC source for my Grinch now.
Once it will be done I will post images on my website.

Thanks :) I'll need that . :D

Wayne J
08-23-2008, 09:59 PM
For a very simple Zero Cross generator.......

Scroll down to 'jrock64' posts.
http://www.doityourselfchristmas.com...ead.php?t=2999 (http://www.doityourselfchristmas.com/forums/showthread.php?t=2999)

vziukas
08-23-2008, 10:07 PM
For a very simple Zero Cross generator.......

Scroll down to 'jrock64' posts.
http://www.doityourselfchristmas.com...ead.php?t=2999 (http://www.doityourselfchristmas.com/forums/showthread.php?t=2999)

I'm solder exactly same today ! Just use peace of prototype board ;)

toodle_pipsky
08-23-2008, 11:28 PM
I had the same kinda dilema - what's a Ren T and why do I have to build another board?!?!?! The nice thing about a Ren T is that is has lots of functions, it's a power supply, ZC and your serial connection. And it's my understanding you can use it with lots of different boards, not just the Ren C. It's just one way of putting it all together and bringing it all through the RJ45 connection.

I ended up not using the Ren T design because I already had my serial adaptor and power to the board, so just needed the ZC. I used the little do-dad that everyone's suggested to you - one thing to note is that doing this you're using option #2 as described on the Ren C wiki page, you'll need to see what parts you need to have on the Ren C board and what pins to connect it to in order for it to work.

Hope this helps along with all the other tips given.

vziukas
08-24-2008, 12:10 AM
I had the same kinda dilema - what's a Ren T and why do I have to build another board?!?!?! The nice thing about a Ren T is that is has lots of functions, it's a power supply, ZC and your serial connection. And it's my understanding you can use it with lots of different boards, not just the Ren C. It's just one way of putting it all together and bringing it all through the RJ45 connection.

I ended up not using the Ren T design because I already had my serial adaptor and power to the board, so just needed the ZC. I used the little do-dad that everyone's suggested to you - one thing to note is that doing this you're using option #2 as described on the Ren C wiki page, you'll need to see what parts you need to have on the Ren C board and what pins to connect it to in order for it to work.

Hope this helps along with all the other tips given.
Are you sure what we need to use Option 2 to connect to REN-C if we use schema from :

For a very simple Zero Cross generator.......

Scroll down to 'jrock64' posts.
http://www.doityourselfchristmas.com...ead.php?t=2999 (http://www.doityourselfchristmas.com/forums/showthread.php?t=2999)


To my humble opinion we need to follow Option 3 guidelines as H11AA1 chip gives not unregulated and unfiltered VDC but impuls each 1/60 sec. - pure ZC.

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toodle_pipsky
08-24-2008, 03:16 AM
Are you sure what we need to use Option 2 to connect to REN-C . . .


I'm no expert - I'm just going off what worked for me - it could be totally wrong!! I've been using my Ren C for a bit now testing and it still works using the instructions from option 2. Maybe one of the experts could chime in and give the actual answer?

TERBObob
08-24-2008, 09:38 AM
Ok .. I am FAR from an expert , but I thiink the differnce has to do with the AC line and TOODLES being from Aussie must be the reason . ?????? Yes ???? Maybe ?????

Anywho .... that little cord with the chip and resistors looks simply enough , but ... what goes where ? and how does it connect ( yeah , I got the AC plug part figured out - LOL , but thats all )

toodle_pipsky
08-24-2008, 09:51 AM
I got this from US sources and had to convert them to 240V - so the pics will be what you need, hopefully!

TERBObob
08-24-2008, 11:06 AM
Thanks Toodle ..
That does help , but , see , I'm one of those , that unless you "take me by the hand and lead me around" , I am still lost as to which wires come from what and go where ? :confused:

toodle_pipsky
08-24-2008, 11:32 AM
Hehehehe, I'm exactly the same. If I give the wrong info, someone step in and correct please.

I used a wall wart left over from a string of lights, so you need what ever gives you 120VAC from the wall. Look at the top diagram, it's the best one, the other is just another reference I was given. 2 wires from your 120V source need to connect to the 2 15K resistors. Look at the H11AA1 chip and line it up with the diagram - semicircle mark matches square mark on the diagram. The resistors connect to the first 2 pins. The leads that go to the Ren C come from the back 2 pins on the opposite side. I have them connected at JP3 on the Ren C, pins 1 and 2 (marked Ground and ZC).

The bottom diagram has an additional resistor coming from it - I don't have that on my board. That might explain why I had to go with option 2 from the wiki to get it to work?? Dunno.

Anyhoo hope that helps. I know how sometimes it can be painful when someone says "here" and you gotta decypher it, but trial and error is a powerful teacher! Good luck.

vziukas
08-24-2008, 11:35 AM
I got this from US sources and had to convert them to 240V - so the pics will be what you need, hopefully!

I see difference in both pictures in your pdf.
bottom one has R1 and connect +5V, Ground

top one has no R1 and connect only +5V

Maybe if you Toodle use top schema, 2nd option is ok to use.
But I think if we use bottom schema with R1, 3rd option should be used ?

EXPERT, please help us in that battle ;)

vziukas
08-24-2008, 03:48 PM
I put all this info into one place at my website:
http://www.christmasinallen.com/ZCDetector.aspx

vziukas
08-25-2008, 01:28 PM
The leads that go to the Ren C come from the back 2 pins on the opposite side. I have them connected at JP3 on the Ren C, pins 1 and 2 (marked Ground and ZC).

The bottom diagram has an additional resistor coming from it - I don't have that on my board. That might explain why I had to go with option 2 from the wiki to get it to work?? Dunno.

So you are using Option 3 :D
"* Option 3 - ZC can be connected directly to the board, by connecting a ZC Signal (purple trace in picture below), to the "ZC" pin (#2) of JP3. With this option, you can remove R1, R9 and Q1."