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***Working Man's DIY Dedicated Home Theater*** - Page 12

post #331 of 604
Thread Starter 
Hi JPA,

I ordered the PID and thermocouple yesterday. It has two "alarm" functions im hoping to use one to turn on fan and other to activate a buzzer if the temp overheats in the event of equipment failure.

Ill have to play with it some to see how it works once i get it.

Hey, question: Someone posted in your thread you could slow the panasonic fan to 1/2 speed with the middle setting of a fan controller, do you know if it would be ok to use the lowest setting of the fan controller?
post #332 of 604
i don't know enough about the motor to know how far it can be turned down. I know some single phase AC motors use a centrifugal switch to take out the starting cap, but I seriously doubt that's the case here. If I correctly understand how these speed controllers work, they just reduce the voltage to the fan (there are lots of different ways to reduce the voltage, but I think that's the goal). This increases the slip, and slows the fan. At some point, you will reduce the voltage enough that the motor doesn't produce enough torque to keep the blower spinning.

After all that, all I know to do would be to try it biggrin.gif
post #333 of 604
Thread Starter 

The ball is finally rolling on hush box and rack venting.  I got waaaay too much of a mess to post any photos yet, but so far project looking good.

 

One mystery photo, can you guess what this is?

 

post #334 of 604
Headlight fluid reservoir...... No wait...... Muffler bearing........ No wait........ It's a........ Actually, I'm not sure? It looks like a can light with aluminum foil around the edge biggrin.gif
post #335 of 604
In-duct cooling fan with LED lights?
post #336 of 604
Thread Starter 
Quote:
Originally Posted by J_P_A View Post

Headlight fluid reservoir...... No wait...... Muffler bearing........ No wait........ It's a........ Actually, I'm not sure? It looks like a can light with aluminum foil around the edge biggrin.gif

Haha, Nope.  That reminds me I need to check my headlight fluid!  tongue.gif

post #337 of 604
Thread Starter 
Quote:
Originally Posted by TMcG View Post

In-duct cooling fan with LED lights?

Nope, but it does kinda look like it.

post #338 of 604
Thread Starter 

Hint:  Its part of the hush box.

post #339 of 604
Quote:
Originally Posted by NicksHitachi View Post

One mystery photo, can you guess what this is?



Iron Man's arc reactor?
post #340 of 604
A photo from the Incredible Hulk's colonoscopy exam? biggrin.gif

Is it the light from the Panasonic projector through the view port in the hush box?
post #341 of 604
Quote:
Originally Posted by TMcG View Post

A photo from the Incredible Hulk's colonoscopy exam? biggrin.gif
Is it the light from the Panasonic projector through the view port in the hush box?


LOL!!!

my guess is Panasonic projector as well ...
post #342 of 604
Quote:
Originally Posted by TMcG View Post

A photo from the Incredible Hulk's colonoscopy exam? biggrin.gif

Bwahahahaha!






.
Edited by J_P_A - 10/1/12 at 11:07am
post #343 of 604
Quote:
Originally Posted by NicksHitachi View Post

T
One mystery photo, can you guess what this is?


Looks like a diffuser (from inside the box).
post #344 of 604
Thread Starter 
One quick cell phone pic, AngryHT guessed it.....

9A5A2155-6595-4FA9-ABE0-E4EFC7DBAFCC-4441-00000B0D39572BD9.jpg

Back side of wall:

5C534894-C065-41D3-8EDF-F05EA5425F13-4441-00000B0D31B95DD5.jpg
post #345 of 604
This is looking fantastic. I really am jealous of everyone who's able to make a dedicated room. I can't wait to graduate, get a place, and do a dedicated area. Great work so far. This is getting bookmarked for references, for sure.
post #346 of 604
Quote:
Originally Posted by NicksHitachi View Post

One quick cell phone pic, AngryHT guessed it.....
9A5A2155-6595-4FA9-ABE0-E4EFC7DBAFCC-4441-00000B0D39572BD9.jpg
Back side of wall:
5C534894-C065-41D3-8EDF-F05EA5425F13-4441-00000B0D31B95DD5.jpg

Looks good so far!
post #347 of 604
Thread Starter 
I finished running the ductwork for the hushbox today and specd out the ducting for the rack. The ducting worked out pretty well and simpler than i thought it would be......

Now i need to run the ducts for the rack and play with the PID controller to see how it works. Once i got a grip on that ill order the fans and hook it all up.

Sorry about the crappy iphone pics:

E2B0A80A-E781-4FA2-B7EA-F54895F4BD19-2154-0000036005F3D563.jpg

8E6ED6AB-FEB2-430A-B0F8-83B3EC469634-2154-00000360213CA4A8.jpg

Here is a shot of the duct and conduit running to hush box:

6150E6D8-EB35-4B20-A8F7-BE0ED44803D9-2154-0000036027ED1418.jpg

While i was up there working i wanted to reposition my subs, move and re-angle the mains so I took a quick shot with the "Hood Popped" smile.gif

I also repositioned seating.

Bad part: Now i gotta recalibrate and EQ the subs over......

7AF54EBA-18AB-46E0-912E-41F9A6FCAB2E-2154-0000035E61B16F61.jpg
post #348 of 604
Looking good, sir! Be sure to post details on that controller. I've been thinking about how to control my fan as well, so this is an option I might be interested in.
post #349 of 604
Thread Starter 

HI JPA,

 

I think a PID controller would work well for you.  I have done some reading on the fans and I'm not very optimistic about slowing down the fan very much.  The Panasonic fans are capacitor fans so if the fan speed drops below 2/3-3/4 speed the cap starts firing trying to "restart" the fan(According to my reading). 

 

I've pretty much decided to go with two 240cfm panasonic fans with a PID controller, relay board, thermocouple, and 24V buzzer each.  I can configure the PID controller to turn the fan on at temp 1 and if the temp exceeds temp 2 the buzzer will come on to alert me if there is an equipment failure like a fan, relay, or other failure.  I'm still working out whether I want the relays in the rack with the controller or mounted remote with the fans but I'm leaning toward mounting the relays with the controllers and having the switched 120V run from rack to fans in attic.

 

I spent last night playing with the PID and trying to decipher the broken English manual that came with the controller and getting the alarm functions to work for my situation proper.  The PID controllers have a lot of features which are not applicable in this application so you have to turn off all the real PID features and setup the rest of the settings.  This is VERY IMPORTANT read the PID controller Model numbers very carefully.  The model numbers determine whether the controller is just a relay or actually outputs DC current or both.  I almost screwed up but was lucky and what I got works fine for me.

 

Let me know when you have a plan and your objectives and I'll help what I can.

 

Nicholas.

post #350 of 604
Thread Starter 

I ordered the thermocouples, controller, relay board, and buzzers to put this all together, and since i know what picture whores we are.......

 

Controller:

 

0

 

Relay board:

 

D112-24V.jpg

 

Buzzers:

 

Item picture

 
 
 

Thermocouple:

 

001.jpg?s=500&q=95&c=de&z=de&f=0

 

 
 
 
post #351 of 604
Now we're talking! I likes me some pictures!

Regarding the caps, that was my concern as well. I wasn't sure how much you can slow them down without damaging the caps.

Do you know what method that controller uses to adjust the fan speed? I assume it just changes the RMS voltage, but there are lots of ways of going about it.
post #352 of 604
Thread Starter 
Quote:
Originally Posted by J_P_A View Post
 
Do you know what method that controller uses to adjust the fan speed? I assume it just changes the RMS voltage, but there are lots of ways of going about it.

 

AFAIK, the controller will not control the speed proper.  It will control something like a heating mantle where lots of on/off pulses and cycles help maintain a setpoint, but I'm not aware of any way to vary voltage or resistance with the PID controller.

 

Now, my plan was/is to use a ceiling fan controller inline with the power wire and adjust the speed that way if needs be. 

 

If you needed variable speed and were creative you could do a variable speed setup with a controller with more alarms and some more relays.  You would just need to wire up two power supplys per fan, one with a ceiling fan controller in-line, one without and have the controller switch over to the higher speed power drop(or bypass the ceiling fan controller) when it exceeds the second setopoint.......  My controller only has one alarm.  It outputs one source of 24V DC when I exceed Setpoint #1  I have that DC current looped back through the relay portion of the controller which opens when Setpoint #2 is exceeded.  Setpoint #1 controls the fan Setpoint #2 actuates the buzzer/alarm.

post #353 of 604
Oh, I understand now. I just assumed that you were doing something other than a binary on/off since you were using a PID controller (Despite the fact that you clearly posted that you did NOT intend to biggrin.gif ).

I'm with you now. Carry on!
post #354 of 604
Thread Starter 

Thats the way I envisioned it too, with proportional control.  There may be controllers out there that can perform this, but mine will not.

 

The controllers were like $23 each on ebay, the thermocouples were $10 each, the relay board was $10, and the buzzers were $2 for two.

 

Total $46+$20+$10+$2= $78 for Control setup.  Fans are gonna be like $300. 

 

You can quickly see how fast this adds up.  The Thermal management products would have been double this, but would have been turn key and a little more polished.  I prob would have used a commercial offering(fan solution) If I felt they would have worked but I'm pumping this air 15-25' to dump in another part of house and just didn't feel those offerings had enough CFM.

 

In other news the new seating position is working well.  I was able to make some improvements with mid-bass response by moving them forward 2ft.  I also moved the mains closer to front wall and blocked their ports.  The ports were rear-firing and I didn't need all that port energy bouncing off front wall and contaminating the my response.  It worked well.

post #355 of 604
Thread Starter 

Haha, saw this and just had to share.....

 

post #356 of 604
Thread Starter 

Order Fans   - Check.

 

Qty of (2)  FV-20NLF1

 

71Hsb7Z7SFL._AA1500_.jpg

 

 

 

Woot!  I'm sure I'll be waiting a bit on the relays and thermocouples as theyre coming from China but that will give me time to finish running the ductwork for the rack.....

post #357 of 604
Thread Starter 
Boring UPDATE:

Running ductwork currently into attic and punching holes in sheetrock. Not a fun project but im looking forward to a cooler/quieter theater.

Both controllers are received.

Relay board, alarms, and long thermocouple will be another week or two.

Both fans will be here Monday-Tuesday.

Currently repurposing an old VCR chassis into the control box to hold the controllers, relays and alarms. This will go into rack and look like a component.

Need to cut holes into rack for intake and exhaust which will create an enormous amount of dust, not looking forward to that! Then just hook up ducts which are ran and hookup power from controller box once its done.

Simple. :-S
post #358 of 604
I'd like to see pics of your Frankenstein VCR. Sounds like a cool project.
post #359 of 604
Thread Starter 

I didn't take any pics of the gutting process.

 

I'll shoot some of the actual re-purposing, just re-used the power cord and case but that saved me some bucks and hopefully the end result is pretty polished.

post #360 of 604
Speaking of VCR's. My dad called over and asked me to "tape something" for him. I had to chuckle when I told him that I have not actually "taped" anything for years. He then asked how I watched programs when I was not home. It never even crossed my mind that my dad had no idea that when I said I had recorded a program I had not "taped" it. This led me to say that I actually DVR'd the program which prompted the question "what is a DVR?" I then found a link and emailed him so he could watch the event live which was the presidential debate. I think it was the first time ever he had streamed anything online. So it was a evening of technical firsts for my dad. My mom on the other hand is better suited for the "Little House on the Prairie" days of technology. biggrin.gif

Regards,

RTROSE
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