The making of the BLF UC4 charger: the start of a new venture, INTEREST LIST, UPDATE 7 (Ramping up slowly...))

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BlueSwordM
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Started speaking with Mooch, but not HKJ.

No worries there.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

BlueSwordM
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INTEREST LIST

1. 1x BlueSwordM
2. 1x AmishBill.
3. 1x OLd_gUY
4. 1x shirnask
5. 1x bhstinger
6. 1x Lux Perpetua
7. 1x anonymous_user
8. 1x mitsuki08
9. 1x gkushev
10. 1× 1stein
11. 1x I_like_lamb
12. 1x Grigio
13. 1x xenotar80
14. 1x charwinger21
15. 1x Cirnyan
16. 1x Joshk
17. 1x Rayoui
18. 1x thisnameisvalid
19. 1x KevinZA1988
20. 1x tomas_f
21. 1× 4Null
22. 1x jmoots
23. 1x Klayking
24. 1x candor
25. 1x Dioda
26. 1x NEIL944
27. 1x heliosxx
28. 1x twodollarbill
29. 1x Yelov
30. 1x slmjim
31. 1x Dep668
32. 1x PBWilson
33. 1x Vaxd
34. 1x Pete7874
35. 1x Dsvist12
36. 1x contactcr
37. 1x Geoduck
38. 1x SKY89
39. 1x engber

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

engber
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Please add me to the interest list.

BlueSwordM
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Also, guys, I actually have a backup plan.

I’ve spoken with DLYFull yesterday, like I said before, and they said that if there’s not enough interest for a brand new aluminium charger, they could use their current UT4 as the base.

The reason for making a whole new charger base? 75-78mm 21700 compatibility and better heatsinking.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

SKY69
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I don’t see my name on the interest list. I expressed interest back in July, post #91

flightless22
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Interested.

bmengineer
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It was pretty clear that a new mold would be too big a risk from the beginning, but what do you mean when you say it will be aluminum? Are you thinking a single milled chunk, or a bent case like the steel cases commonly seen on other electronics? A solid piece would be fantastic just for the heft, but I’m a bit concerned it would impact costs quite a bit – and what measures will be taken to prevent bare cells or internal components from shorting against the conductive body? Surely a thin layer of anodizing or paint isn’t sufficient?
This seems like an interesting project for sure, but I’m concerned the specific requirements you have for a charger may be to niche compared to others, and the budget may make it impossible to create a quality product that meets the requirements safely.
Have you considered working with the Cheali Charger software? It’s open source, and seems to do just about everything you want when paired with an Imax B6. A custom case with all the bits and pieces you want could be a lot easier to create, and basing it off an existing product could improve reliability. Or is there a reason you don’t want to go this route?

Find all my reviews of flashlights and more gear at www.bmengineer.com

primarycell
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I’m in for 1.

DarkEagle205
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Interested in 1

SKV89
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I’m in on anything BLF!

I currently have the Xtar Dragon VP4 Plus. Does this offer anything over the VP4 Plus and MC3000 chargers?

BlueSwordM
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@bmengineer, I’m not worried about that. Who do you think built the aluminium ISDT chargers? Smile

A thick layer of black anodizing(50um+) should be sufficient.

Anyway, that, I don’t know yet what method will be used. I’ll have to ask later.

About the 49$US budget, they said that even with the nickel plated brass holders, it’s actually a rather reasonable price as a 4 cell charger for the BLF GB, even including the necessary safety measures and testing that I asked for.

Any larger than that, and new tooling would make it much more expensive, since it’s built out of aluminium. Still way less than a plastic mold though.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

BlueSwordM
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That’s the problem…

It would actually be more expensive to make this compatible with 75mm+ 21700s.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

bmengineer
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BlueSwordM wrote:
@bmengineer, I’m not worried about that. Who do you think built the aluminium ISDT chargers? Smile

A thick layer of black anodizing(50um+) should be sufficient.

Anyway, that, I don’t know yet what method will be used. I’ll have to ask later.

About the 49$US budget, they said that even with the nickel plated brass holders, it’s actually a rather reasonable price as a 4 cell charger for the BLF GB, even including the necessary safety measures and testing that I asked for.

Any larger than that, and new tooling would make it much more expensive, since it’s built out of aluminium. Still way less than a plastic mold though.

I wasn’t aware ISDT had aluminum slot chargers. And what are your thoughts on Cheali? Even if you’re set on using entirely different software, supporting the readily available open source software seems like an obvious path to take, no?

Find all my reviews of flashlights and more gear at www.bmengineer.com

BlueSwordM
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Cheali would be great, yes. I’ve read on it multiple times before on the other forum. A bit overkill, but this is what BLF is about.

I’ll give the suggestion to the manufacturer.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

Binford
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Glad the name cheali was brought up.
I recently modded my iMax B6 clone and couldn’t be happier, the firmware is incredible.

The developer for cheali himself (Paweł Stawicki) is no longer actively working on the firmware. I think he perfected it and couldn’t find anything else to improve.

I also subscribed to the thread, great idea.

BlueSwordM
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@SKV89

1. Higher total current(12A at 4,4V max)

2. Many more current options.

3. Charging voltage control.

4. More thorough very low current low voltage recovery.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

Duke
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Interested in 1

mikewilzn
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I am definitely in!

Barkuti
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What's the point with SecondLifeStorage

You can count with me in bulking up unconditionally, I do not back up even if am not straight interested right now due to economic reasons.

And even if I am a money-efficient Smile fellow I have to admit I personally would extend the price target a little bit, at least to guarantee room for the new aluminium chassis idea and/or other power user requirements/features. Aluminium can also be nickel plated for the rails.

Now that we're here BlueSwordM, you may want to start ordering nickel plated beryllium copper springs for the rails. Big Smile

mrheosuper wrote:
Since we can change current from 0.1 to 3A in 0.1A step, i think encoder wheel is better than 4 buttons input, no one want to press a button 30 times

Unnecessary granularity in the higher end while insufficient at the lower, button wise.

For less clicks, as default range something like 35 - 50 - 70 - 100 - 140 - 200 - 300 - 400 - 600 - 800 - 1200 - 1600 - 2400 - 3200 would fit best, imho. Progressive granularity in any case.

When you keep pressed a key on a computer keyboard it auto-repeats. This can also be of help but please make it quick enough (low repeat delay, high repeat rate).

bmengineer wrote:

Have you considered working with the Cheali Charger software? It's open source, and seems to do just about everything you want when paired with an Imax B6. A custom case with all the bits and pieces you want could be a lot easier to create, and basing it off an existing product could improve reliability. Or is there a reason you don't want to go this route?

I like how does this sounds. 

Deleting a just published post causes the forum thread answer notification to fail. Thus, if you need to change your just published post, edit it. Thanks.

Please avoid fully quoting lenghty posts, namely with nested quotes. Trim quotes down to the essential. Helps with neatness and legibility. Thanks.

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DrinkingJar
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In for one

bmengineer
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tempo wrote:
bmengineer wrote:
I wasn’t aware ISDT had aluminum slot chargers.

here it is:
https://www.isdt.co/c4-2.html?lang=en


Their page disagrees with you:

And without sliding bays it’s not really the same thing.

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BlueSwordM
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@Barkuti, if we are going with nickel plated aluminium rails, you are going to be paying for the difference in price vs nickel plated brass. Big Smile

Plating aluminium is rather tricky and expensive, so a brass alloy with good tensile strength and yield strength would be adequate.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

TheOnlyDocc
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I dd not know about the ISDT C4 charger. Like the UI options and the option to connect it to a PC.
But lets wait what the BLF charger will offer when the specs are finalized.
I am in for one BLF Charger!

New WildTrail (former LuckySun) D80v2 Sale has Started http://budgetlightforum.com/node/66255

Tixx
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Definitely in for 1. Possibly more later as it progresses with more solid details. Thank you! This is a great project and appreciate your commitment, time and energy into i!

JamesB
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I’m in BlueSwordM, thx for your work.

Yourrid
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I have an OPUS 3100 and SkyRC MC3000 and both have great features. A combination of these two would be a fantastic charger!

One thing I would DEFINITELY need is reinforced springs and mounting hardware. My OPUS is currently down to 3 slots due to post the springs hook around broke off. My SkyRC charger had the same problem (the plastic post snapped off) so I had to hook the springs around something else inside the charger. It seems like the springs, and the posts they attach to are the weakest parts in the entire charger, and both manufacturers make them out of plastic Facepalm

I’m in for 1 with the stipulation that those spring posts are made of metal (or somehow reinforced).

Jensen
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I’m interested in one of these, please add me to the list

zipelgas
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I’m interested!

Overkill is just about enough!

nobody
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Interested

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I am interested in this charger-to-be.

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