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Old 04-02-2017, 03:26 PM   #2621 (permalink)
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Rotorcraftrc is out of their mind asking ~$300 for some laser cut plastic and hardware in their "DIY kits". If that price included the case, they might have got my money.

Progressive's pricing looks about right but I've never cared for how they bury the charger below the deck and then just slap a wimpy PC fan in there and hope things stay cool.
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Old 04-25-2017, 02:56 PM   #2622 (permalink)
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May I ask how all of you guys that have a flush mount set of balance boards on their deck mounted them. Thanks
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Old 04-25-2017, 03:04 PM   #2623 (permalink)
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https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

Drill a hole, insert jack, tighten nut
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Old 04-25-2017, 05:59 PM   #2624 (permalink)
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Thanks nem3 for the info on the jacks. That I get, but I'm asking about the entire balance board that gets recessed to be flush with the deck.
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Old 04-25-2017, 09:55 PM   #2625 (permalink)
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OK. Finally got the main box ready. Been slowly working on it for 6 months.
I'm lucky that I was able to use some of the equipment at work.
Including the CAD/CAM software. I created lot of rev's before zeroing
in on this. Also helpful that Nanuk has data files of the inside of their cases on their site.
I used the 940 case.
2 Meanwell 2000W 48V power supplies.
2 Cellpro DPL8 chargers with a Bump control.
16 24V fans requiring a couple of voltage reducers and a USB power out.
My old 24V setup had major buck/boost issues with my Honda generator,
so I went 48V this time.
Home made balance boards and home made fan grill covers.
Main goal is to charge 4 5000mAh 6 cells at 3C without straining anything
but the wall outlet or generator.

Still need to work on storing all the cables in the lid.
I may add a tablet in the lid to work with the bump, but honestly,
I don't see any reason to do so.











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Old 04-25-2017, 10:08 PM   #2626 (permalink)
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That's some stuff!

Home made balance boards: do you mean the white pads where you have banana frmales too?

As a side note: with the two red bananas on on side and the two black on the other, take care not to see them as a "group" where to plug your adapter in - I would have done it with a red and a black on each side, for how my brain works.
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Old 04-25-2017, 10:33 PM   #2627 (permalink)
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Quote:
Originally Posted by Coco66 View Post
That's some stuff!

Home made balance boards: do you mean the white pads where you have banana frmales too?

As a side note: with the two red bananas on on side and the two black on the other, take care not to see them as a "group" where to plug your adapter in - I would have done it with a red and a black on each side, for how my brain works.
There is a circuit board under the white pad that I milled the traces on connecting the two connectors in parallel. That and they needed to be soldered down.

My brain is looking at it as "single battery, top row or bottom row". Parallel charging then both sets.
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Old 04-26-2017, 03:04 AM   #2628 (permalink)
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You can eleiminate the buck/boost issue with the 24v setup with the PL8's if you can trim the output voltage if your PS up a little.

With my 24v 3000w Meanwell I can trim it up over 25v. If you can get it up to around 25.5v-25.7v then your are out of the issue for both 6s and 7s packs. You may need a little trial and error to find the exact voltage that works if you use both 6s and 7s. I believe some of the server PS's also have this ability but not all.

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Old 04-26-2017, 04:45 AM   #2629 (permalink)
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Default Post your charger case

...
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Old 04-26-2017, 07:31 AM   #2630 (permalink)
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Would really depend your balance boards. Some you'd cut a through hole and mount it from the bottom. Mine I just used a CNC to route a depression and double side taped them into it.
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Old 04-26-2017, 08:50 AM   #2631 (permalink)
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Quote:
Originally Posted by Thunder Fighter View Post
You can eleiminate the buck/boost issue with the 24v setup with the PL8's if you can trim the output voltage if your PS up a little.

With my 24v 3000w Meanwell I can trim it up over 25v. If you can get it up to around 25.5v-25.7v then your are out of the issue for both 6s and 7s packs. You may need a little trial and error to find the exact voltage that works if you use both 6s and 7s. I believe some of the server PS's also have this ability but not all.

//Dennis.

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Good thought about changing the output voltage on the meanwells.
However In the last photo I was testing with three 8 cell batteries.
Use them on a 570.
So for me it would probably still be a problem.
But for guys that stop at 6 cell that is a good solution.
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Old 04-26-2017, 09:17 AM   #2632 (permalink)
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Quote:
Originally Posted by potrzebie View Post
Good thought about changing the output voltage on the meanwells.
However In the last photo I was testing with three 8 cell batteries.
Use them on a 570.
So for me it would probably still be a problem.
But for guys that stop at 6 cell that is a good solution.
You should still be fine with 8 cell packs. My understanding of the issue is that when the voltage the charger need to supply for the packs being charged is close to the input voltage the PL8's buck/boost circuit can switch back and forth causing the load to fluctuate on the PS and back to the generator as well if running off a portable supply. By moving to 25.5-25.8v a 6s pack will be fully charged at 25.2v and an empty 7s pack will be at 25.9 (3.7v per cell) so you avoid the buck/boost switching area. An 8s pack is well above this voltage so also avoids it as well.

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Old 04-26-2017, 09:32 AM   #2633 (permalink)
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Quote:
Originally Posted by potrzebie View Post
Good thought about changing the output voltage on the meanwells.
However In the last photo I was testing with three 8 cell batteries.
Use them on a 570.
So for me it would probably still be a problem.
But for guys that stop at 6 cell that is a good solution.
8*4.2v=33.6v which is greater than the max voltage input on the PL8. However, you can also use a lower voltage to keep the charger in boost mode all the time.

8*3.7v=29.6v so if you can set your power supply to at least 1-2v below what your discharged pack is it will stay in boost mode all the time.

Might not be practical if using 6s packs as well.

All chargers use buck/boost so the issue isn't specific to the PowerLabs.

I run my Dual PowerLab 8x2 on 48v.
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Old 04-27-2017, 05:08 PM   #2634 (permalink)
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Does anyone know if there is any place I can purchase a deck for a pelican case? Specifically a 1550?

Thanks
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Old 04-27-2017, 07:31 PM   #2635 (permalink)
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Quote:
Originally Posted by pherasi1 View Post
Does anyone know if there is any place I can purchase a deck for a pelican case? Specifically a 1550?

Thanks
These guys have an off the self aluminum one. They may be able
to help with plastic. Wouldn't hurt to ask.
https://www.datapro.net/help/pelican_panels.html

Nanuk sells panels, aluminum and clear PC for their cases.
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Old 04-27-2017, 08:31 PM   #2636 (permalink)
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Seems the pricing on some of these panels is crazy. I just downloaded the CAD drawing for my Pelican case from the Pelican website, printed it full size, taped it together, put on the aircraft grade ply I purchased and cut it out. Thin, light, and has the natural beauty of wood. Will be doing the same for my next case as well.
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Old 04-27-2017, 09:14 PM   #2637 (permalink)
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Here's mine. Not an all in one as I like setting up my chargers on my tailgate or a table at the field. And if I happen be using deep cycles I can just leave the power supply unit behind.

But it all does lock together at the end of the day to be picked up as one unit.

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Old 04-28-2017, 06:58 PM   #2638 (permalink)
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I am in the process of building a case, and am looking for someone to cut the deck for me. Looking for someone in the midwest area preferably, but am open to other locations. Appreciate any help in this regard . Thanks
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Old 04-29-2017, 12:20 PM   #2639 (permalink)
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I guess depending on the deck material this would also be an option for cutting my deck. Do you guys know of someone that does that kind of service for us hobbyists ? Thanks again.
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Old 04-30-2017, 06:54 PM   #2640 (permalink)
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Quote:
Originally Posted by Flyrc67 View Post
I guess depending on the deck material this would also be an option for cutting my deck. Do you guys know of someone that does that kind of service for us hobbyists ? Thanks again.


Have you contacted Progressive RC to ask if they can do what your asking?


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