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WrineX

Np50 Bulk Charger V2.0 Travel edition (for Zaxcom and Lectrosonics)

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Hi, well after making my WX-Np50 Bulk charger Here. i made a new one on some request. 
I've completed a few, a few months ago but never had the time to post anything about it. 
Its a travel version. even smaller then the already "smallest Np50 Bulk charger" that was/is available.
It lacks the golden ratio in dimensions (witch bothers me) but if size counts?  this is it!.

I also implemented a switch (suggested by Constantin) to be able to reset the charging off all batteries or just turn it off. It is a switch with protection so you wont be turning it of by accident. (you have to pull and switch).
The fact it is fed by 5 Volt DC, makes it possible to use an external DC-DC converter (coming in the near future) so you could use the same charger on a set powered by your cart battery, when mains power is not available.

 

 

NP50 Charger V2.0 Travel Edition


Features

- Charge 12  NP-50's Simultaneous.

- Swiss made gold plated spring loaded battery contacts, that wont scratch up the battery contacts and insures lowest resistance possible.

- Very Small form factor (HxWxL) 5x14,5x9 cm for a 12 slot charger

- External power brick from a well known switching power supply brand.

- All passive cooling. No fan noise to keep you awake at night.

- A reset/on off switch with protection so you cant bump it by accident and end up with 12 empty batteries. 

- ability to be fed (soon) by a dc dc converter so you can power it from a cart battery. 


 


 

Power supply specifications


 

Power

30 Watt

Input range:

85~264 Vac

Certificating:

CE

Cooling :

Passive

Protection :

Short circuit
Overload

Over voltage

 

 

Charger specification 


 

Charge rate each slot :

~400mA

Charge percentage :

~95-98 % increases life of the battery up to 1.1 times

Overheat protection :

Charger will cycle down charge current if module reaches above 65 degrees Celsius.

Normal working temperature at room temperature 6 slot :

Max ~44 degrees Celsius

Normal working temperature at room temperature 12 slot :

Max ~46 degrees Celsius

Normal working temperature at room temperature :

Max ~48 degrees Celsius

 

Dimensions 12 slots :

(HxWxL) 5x14,5x9 cm

 

Excuse me for the rather bad pictures... i dont have one myself at the moment to make proper photo's (aint that silly)


Picture 1
The charger, with the safety switch.
Picture 2

Size comparison full sized charger vs V2.0 with external power brick.

Picture 3
Charging some test Np50's.

Please let me know what you think ! 

Greetings Joppe Peelen
 

 

 

 

 

 

 

 

 

 

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13 hours ago, Jason Todd said:

Very cool. How much are you selling them for?



Thanks ! well the exact price and in witch form is hard to say yet. since if i sell them i want it to be by the books. by the book things tend to be a bit more expensive then from a friend :) 

i was thinking of making a few standard versions like 4,8,12 or i leave out the 8 and make 6 or 12 slots. must try to keep it simple, i have the tendency to say everything is possible (witch is, depending on time and money i guess) and make it to complicated for myself. since im only a dude with some tools, im not a complete production line. Everything is hand assembled, i make the adjustments to the circuit , the housing , the soldering , the testing, the bending of the light guides, the things that hold the batteries etc etc. that makes it possible to do some requests, but starting price will be steeper then a store :(

I wont be making the old charger anymore, although i like the looks better with the powersuplly but to meet any regulations i rather ditch 220 or 110 volt in general in my own designs. and only work with low voltages. witch makes replacing any failures on powersupply's easy to. although never seen that so far. i know the brand well and all of there stuff is rather nice, could even upgrade to a medical rated one if you really wanted more reliability and less EMF-EMI etc.


But to make a long story short :) prices would be around without tax in the region of 500-600 euro for a 12 slot charger.  i use the same (modified) charge circuit as my ''competitors'' (not like calling anyone that) instead of 10 you get 12. i still need to think of a price for the 6 bay or 4 and 8 if i ever make one.

besides all of this , i still have some ideas lingering in the background to make it more versatile. But i lack the finance to take the step, so that has to wait a little unfortunate. i can say  one of them is ,You can decide what kind of charger you buy, and upgrade when business is good :)


I will let everyone know if i got final pricings , might need to make a decent website or something haha

time to talk to friends if they are able to help me out :) my web design is a bit rusty

 

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I think this looks great! External standard power supply is a good idea (and later the ability to power from a DC source battery). There are few multi-unit chargers available and as more and more people are using Zaxcom ZMT transmitters and Lectrosonics SSMs, this will be a very useful product.

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I dont know if you've seen the video about the 12 slot 110-220 charger ?  the slots are the same in the small one, and might give a better insight.  please do take into account i made the video for my Youtube audience that dont know anything about using these batteries :) and English is not my native language so hihi.
 

 

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Hi Joppe,

I am very intrigued by your new version. I prefer to charge Tx batteries on the cart but the USB dual chargers don‘t hold the np-50 well enough when pushed over rough terrain. Can your charger be mounted vertically and still have a snug fit on the batteries? If given the option i would go for an 6-bay on the cart and have a second one placed stationary.

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8 minutes ago, RomanH said:

Hi Joppe,

I am very intrigued by your new version. I prefer to charge Tx batteries on the cart but the USB dual chargers don‘t hold the np-50 well enough when pushed over rough terrain. Can your charger be mounted vertically and still have a snug fit on the batteries? If given the option i would go for an 6-bay on the cart and have a second one placed stationary.



ai vertically , hmm im not sure  as i explain in the video there is some slop because of material availability (and being able to put the batteries into the slots since its so compact). i am not to sure.    its not designed as being vertically, to be honest. and since the one with external PSU is sooo small i cant hardly think of a space reason to do so. its 14.5 x9cm  thats like a quarter of an A4 paper sheet :) for 12 batteries.besides that it kind of depends on how rough the terrain is :) 

im sorry i cant give you an exact answer , i dont currently own one of my own chargers ....haha

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But I do own one and if the new smaller charger will indeed be like v1, then I am pretty sure that it will absolutely hold up in an upright position. The batteries are held in place pretty firmly. Certainly no comparison whatsoever to any of the known chargers. The only other type of charger that could perhaps be used upright is this „flatbed“ type charger. But those need quite a bit of space to charge just one battery. 

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52 minutes ago, Constantin said:

But I do own one and if the new smaller charger will indeed be like v1, then I am pretty sure that it will absolutely hold up in an upright position. The batteries are held in place pretty firmly. Certainly no comparison whatsoever to any of the known chargers. The only other type of charger that could perhaps be used upright is this „flatbed“ type charger. But those need quite a bit of space to charge just one battery. 

haha thanks Constantin , yeah your are the owner of my first 110-220 charger i sold to someone i did not know :) if you got it near or maybe some other time could you put some bat in there and shake it vertically ? ;) im just not sure. the sots are exactly the same  on the small; one as the big one :)
anyway i just cant guarantee they will stay in there. im sure i can make one that does, but thats the thing.... i cant make different ones for everyone.

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35 minutes ago, WrineX said:

 could you put some bat in there and shake it vertically ?

 

Yes I can, and I just did. The batteries stay put no matter what. Shook it vertically, upside down, side ways, no problem the batteries stay

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Just now, Constantin said:

 

Yes I can, and I just did. The batteries stay put no matter what. Shook it vertically, upside down, side ways, no problem the batteries stay

OOh thats good to hear:) niceeee. RomanH theres your awnser i guess :) although i still dont gurantee anything as you can imagine. but aaprantly it holds :)

Thanks Constantin ! by the way i implemented youn on/off switch in the new design you wanted :) im sorry its not in your version :(

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8 hours ago, Constantin said:

 

Yes I can, and I just did. The batteries stay put no matter what. Shook it vertically, upside down, side ways, no problem the batteries stay

 

8 hours ago, WrineX said:

OOh thats good to hear:) niceeee. RomanH theres your awnser i guess :) although i still dont gurantee anything as you can imagine. but aaprantly it holds :)

Thanks Constantin ! by the way i implemented youn on/off switch in the new design you wanted :) im sorry its not in your version :(

 

That‘s awesome. I think anything that is supposed to be mounted on a cart will eventually be installed in any possible position by one user or the other. You might be really on to something and i can see more mixers adapting on-cart charging once they have a viable option for their np-50s

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