OPUS BT-C3100-Stock Fan VS. Top Tier Delta fan

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CheapThrills
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Great test and great idea to replace the fan! Smile

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alternety wrote:
I am trying to replace fans.

I have a couple of questions.

The fans I am looking at take about 0.45 W at 12 VDC. It is one of the Sunons in a link above. It is much quieter that many others. 16 dbm, 3 CFM.

How much power is available from the 12VDC feed going to the OEM fan?

Second is kind of an idea around the same fan. There is a version of it that uses a third wire for speed control. Using that version I could just tie the fan to raw DC, and use the controller. The question in that scenario is what does the output of the fan driver in the charger look like. Is it PWM, or just a variable DC output being dropped by the resistor that is in series. If I can use a third wire for a low power control signal, it eliminates worrying about the power available from the original driver.

According to HKJ it can take up to 2W[POST 1]. My Delta is rated @ 1.44W and has been working fine since its installation last spring.

Regarding your other questions,I do not know,HKJ and some others may know.

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Environment molds a person. Perseverance changes them. 

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CheapThrills wrote:
Great test and great idea to replace the fan! Smile

Thanks Thumbs Up

Solitude breeds contemplation which creates clarity. 

Environment molds a person. Perseverance changes them. 

                                                                   WOLFDOG 

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wolfdog1226 wrote:
wolfdog1226 wrote:
Henry Xu is very accommodating and pretty efficient and reliable.

to me
Hi, Robert

With our new design, we have not fixed the fan size yet. If we can use two bearing type fan, I think the problem of fan reliability issue will be fixed, no matter ADDA fan or some other fan to be used.

We are still reviewing the fan internally.

regards

henry

___________________________________________________________________________________________________________

This is in regards to the “NEWLY PLANNED GENERATIONOPUS which is due out in several months. This will be his present to me!

sales@opus-instrument.com
Jun 6 (1 day ago)

to me
Hi, Robert.

For discharge terminate, we will terminate at 2.7v with load of 1000mA. With this conidtion, it will be safe for batteries with protection.

regards

henry
_____________________________________________________________________________________________________________

I have asked him everything that I have needed to ask him. Now I wait to hear from him in several months when the charger comes out.

I have contacted Henry 3 times since August 25,2017…about every 10 days after the initial email.. NO REPLY

I am baffled why all of the sudden he does not respond. We exchanged dozens of emails in April and May of 2017. He was very efficient and prompt,,,,,,,,no more!

Did something happen to him? Did he get another job?,,,,,,If so,someone in the company probably would have responded.

Just sent them another[and my FINAL] email. First[4th overall] one since September 10,2017.

The fact that so far they have not responded after promising me a FREE sample of the NEW AND IMPROVED Opus is very bothersome.

Solitude breeds contemplation which creates clarity. 

Environment molds a person. Perseverance changes them. 

                                                                   WOLFDOG 

wolfdog1226
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After 9 weeks and 4 emails I finally got a response from Henry. Wink

sales@opus-instrument.com
5:33 AM (8 hours ago)

to me
Hi, Robert

Thanks for your interests with our new item development.

we have some delay due to manpower reason. Our firmware engineer resigned so we need to find new engineers to complete the project.

we are not clear when the new design can be released. I will update you once there is result available.

regards

henry

Solitude breeds contemplation which creates clarity. 

Environment molds a person. Perseverance changes them. 

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teacher
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/\ .. Excellent… glad he finally responded. Thumbs Up

You never know how a horse will pull until you hook him up to a heavy load./"Bear" Bryant 

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klrman
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I found a quality 5v fan for replacement.  Any reason why a 12v fan was used for replacement?

tatasal
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klrman wrote:

I found a quality 5v fan for replacement.  Any reason why a 12v fan was used for replacement?

The stock fan is 12vdc.

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tatasal wrote:
klrman wrote:

I found a quality 5v fan for replacement.  Any reason why a 12v fan was used for replacement?

The stock fan is 12vdc.

 

I thought so too until I read the OP and found this below.

 

Stock[ADDA] fan- 5v/0.13a/0.65W

Delta fan- 12V/0.12A/1.44W

teacher
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Yep…. The 5V fans had a resistor wired in line to knock the 12V power supplied down to 5V.
The 12V ‘replacement fans’ were just wired straight with no resistor.

You never know how a horse will pull until you hook him up to a heavy load./"Bear" Bryant 

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klrman
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Thanks.  I will have to look at this video below again as he replaced the stock fan with a 5v fan but I missed the part where

the resistor was in the wire when he cut and spliced the connector. 

 

tatasal
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In one of the Opus chargers, I installed a 12vdc fan salvaged from a PC power supply. I drilled several holes at the bottom half of the charger, spliced off a connector from another Opus charger, then installed the connector in place of the stock connector (which is still connected to the stock 12vdc fan but no longer connected to the pcb as shown).

The new fan now sucks through the numerous holes, drawing ambient air through the cells and down the 4 rails and the pcb below, and much quieter now, making the cells just warm enough to trigger the charger’s temp. termination requirement.

The new fan still kicks in automatically as required by the sensors.

And yes, the stock fan is 12vdc, left untouched.

Below shows the original connector I got from my other Opus is connected to the new fan, then connected to the original male terminal, leaving the Original fan and connector untouched. So in effect the bigger fan is still controlled by the charger automatically.

Btw, those long rectangular raised strips, surrounded by my drilled holes, are also open on its side (air can pass through too), just cannot be seen from this photo angle.

Lastly, this mod is just for fun, (and an improvement with regards to noise and cooling), but actually, the stock fan is enough for the cooling needs of this charger.

klrman
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tatasal, that's a nice little setup  you got going there, I like it.  I have a lot of spare pc fans so you've given me a good idea thanks.

teacher
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@ tatasal……

I remember seeing those pictures of your ‘Opus Fan Mod’ somewhere before!! That is one sweet mod too…… Thumbs Up

Nice job!!

You never know how a horse will pull until you hook him up to a heavy load./"Bear" Bryant 

 .................................. "Slow is Smooth, Smooth is Fast" ...................................

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tatasal
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teacher wrote:
@ tatasal……

I remember seeing those pictures of your ‘Opus Fan Mod’ somewhere before!! That is one sweet mod too…… Thumbs Up

Nice job!!

Thanks…but l forgot where l posted it so l had to take new photos again haha. Beer

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tatasal wrote:
teacher wrote:
@ tatasal……

I remember seeing those pictures of your ‘Opus Fan Mod’ somewhere before!! That is one sweet mod too…… Thumbs Up

Nice job!!

Thanks…but l forgot where l posted it so l had to take new photos again haha. Beer
Your welcome. I can’t remember either, but I do remember seeing it somewhere. It was such a cool mod it was unforgettable. Thumbs Up .. Smile

You never know how a horse will pull until you hook him up to a heavy load./"Bear" Bryant 

 .................................. "Slow is Smooth, Smooth is Fast" ...................................

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ChrisGarrett
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I’ve got two of the Delta fans coming in the mail and they should be here in a couple of weeks.

Didn’t see that the Ebay ad was for 2 pieces, but oh well…my stock BT-3400 fan is working fine, so these are just spares.

Chris

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Good evening gentlemen,

FLAW in Opus BT-C3100 2.2,,,,at least mine is flawed!

I have discovered that It is NOT 26650 friendly after acquiring 2 × 26650 torches.3 out my 4 26650’s do not make contact on the positive end. After evaluating the problem, this is what I discovered.

1. The positive contact does NOT have a nub[nipple] on it like my other 3 chargers.

2. The positive contact is recessed a bit and not robust like my other chargers.

3. The battery well is not deep enough resulting in the BT/FT to rise above the chargers positive contact resulting in NO contact.

If I manipulate the batteries , sometimes I can get temporary but precarious contact.

I went and bought some Neodymium magnets[HKJ recommended] and they did not help becuase it is a flaw in the contacts design where these bigger 26650 rise above the positive contact.

These batteries do Not work.

1. Xtar 26650 4000mAh-

Look how RAISED the positive contact is and it still does not work because it hovers above the chargers Positive contact because the well is NOT deep enough!

2. Orbtronic 26650 5750mAh-

I have Three of these. I put solder blobs hoping that would help,,,it did not. The size of the batteries positive end makes NO difference, the positive contact of the charger is flawed!

3.Ijoy 26650 4200mAh

The Vappower 26650 4200mah is the only one that works!

ALSO: The Thrunite 26650 5000mAh w/ Brass BT is iffy. Battery needs to be manipulated in order to make contact.

Photos below:

p.s I am still waiting for my NEW OPUS from Henry. I have not heard from him since last September. I emailed him a few months ago and again today to let him know about this issue.

Solitude breeds contemplation which creates clarity. 

Environment molds a person. Perseverance changes them. 

                                                                   WOLFDOG 

chops728
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Put a Piece of foil between the contact point—- better yet a strip of copper or brass —- but foil does work— fold a piece about 4-5 layers thick about 1/2 “ wide x 1- 2 “ long so you can hold it in place until the battery clamps it in

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Hey WolfDog!! How goes it??

It’s been a bit over a year since this thread got started & we had all that fun last summer figuring things out.

Good to see your post. Sorry about the problem & hopefully Henry will also get you that new charger he promised you…. if they ever finish them.

Take care my friend…… Smile

You never know how a horse will pull until you hook him up to a heavy load./"Bear" Bryant 

 .................................. "Slow is Smooth, Smooth is Fast" ...................................

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Thanks Chops & Teacher!

I tried the aluminum foil before I used the magnets. It did not work.

Here is the deal. It is a pain in the a%% but usually I can get contact[unstable and precarious] if I manipulate the battery by twisting it and lifting the positive end UP a bit. The key is when I see that it is connected I have to stop. This can 10 to 30 seconds to accomplish.Any small bump or movement and ALL the data from a capacity test is gone! Facepalm If it happens during charging,,,,no big deal as I have a half dozen other chargers I can use instead.

Also to note, I had solder blobs put on before I got the magnets. Since it was not flat anymore that may have hampered the connection. I sold those Two Orbtronic to my soldering technician and hiking buddy Bob.

I ordered Another FT Orbtronic and One BT Orbtronic 26650. If they do not work properly[to be expected] I will try the magnets on those.I wanted Two BT’S but they only had one left,,,in fact they only had One FT left also!

The Ijoy 26650 4200mAh has the most recessed FT of any 26650 I ever had. When a small solder blob was put on that, basically making the top level w/ the wrapper and can,I got it to work very well,,,just like the 18650’s ect.

Here is the Ijoy w/ My CATvn V6 NW 5000K awesome torch!

P.S I see that all of my photos are gone from when I started the thread. I use postimage.org. That sucks,,,that was a lot of hard work and time consuming!

They work now but I think they had a glitch or change in format? I can not remember.

Solitude breeds contemplation which creates clarity. 

Environment molds a person. Perseverance changes them. 

                                                                   WOLFDOG 

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BTW the Delta Fan and Liteon SMPS are still working SUPERBLY!!! No Hiccups! Thumbs Up

Solitude breeds contemplation which creates clarity. 

Environment molds a person. Perseverance changes them. 

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Petr J.
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I use magnets 6×1 millimeters. The plus and minus the battery. At Ali I bought them 100 pieces for about $ 2. If they are low, buy higher. Maybe 6×2 millimeters.




wolfdog1226
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^^^^^

Thanks,,,,,,,,,,,,,,,Mine are 3mm X 12mm. I think Home depot has your size. I will get them if they do when my new batteries[sold the others] come in next week. First I will see if these 3mm X 12mm work.I would only be able to use 1 because of their size. 2 of your size seems better!

Solitude breeds contemplation which creates clarity. 

Environment molds a person. Perseverance changes them. 

                                                                   WOLFDOG 

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@ Peter J.

Just got some 6mm X 1mm Neodymium magnets on Ebay….3X the money but will get here 3X faster than coming from China! Thumbs Up

Thanks for your help, I am sure they will work after posting your pictures.

Did you try just using 1 magnet?

Are you using 2 to make it even?

,,,thanks,,,,,,,,,,,,

Solitude breeds contemplation which creates clarity. 

Environment molds a person. Perseverance changes them. 

                                                                   WOLFDOG 

Petr J.
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I use two. On plus and minus. I bought them 100 pieces. The price was very low – US $ 1.51. The price is really fun. 100 pcs!! The shipping cost was US $ 0.63.

I bought them here:
https://www.aliexpress.com/item/Cylinder-Rare-Earth-Mass-Neodymium-6mm-x...

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Petr J. wrote:
I use two. On plus and minus. I bought them 100 pieces. The price was very low – US $ 1.51. The price is really fun. 100 pcs!! The shipping cost was US $ 0.63.

I bought them here:
https://www.aliexpress.com/item/Cylinder-Rare-Earth-Mass-Neodymium-6mm-x...

Yes, I saw that. Great deal. I just did not want to wait 2,3 4 weeks for it. I paid $7.64 including shipping for 100 pieces! I only need 10 at the most. I will have them next Wednesday or Thursday.

Solitude breeds contemplation which creates clarity. 

Environment molds a person. Perseverance changes them. 

                                                                   WOLFDOG 

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Judging from my own experience, the only way to keep the OPUS BT-C3100 from overheating and also from heating the batteries, is to stick a big ass fan under it, there is no other option. Big Smile

Here is mine abomination, works great so far! xD I also put a step down converter, so I can control the fan speed.

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hmmm…….I’ve got an extra Corsair liquid CPU cooler around here somewhere……..

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Nice custom fan A_M_K. Thumbs Up

Now you just need a better power supply so you do not have stoppages and Resets where you lose all data during discharge tests like me and many others had from the original power supply.

My 12V/5.5A/66W Liteon SMPS

Solitude breeds contemplation which creates clarity. 

Environment molds a person. Perseverance changes them. 

                                                                   WOLFDOG 

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