WrineX

Hmm i was strolling trough my designs.... mostly Loudspeaker related, more then 150 projects and tests.... mostly just done once to never build/test again it is a propper mess. a bit like editing in audio and video... filenames like final_final 3 etc But i found an old recording when i made my first arduino working program (im bad in programming) used for discharging the NP50 batteries after i charged them in my First charger. and keep track of how much mAH is in there depending on different charging currents compared to a single charger that you can tailor for best results as reference. i think i was content it worked playing loud music and probable had a beer haha By now there are relais in there that cut the discharging to the set voltage in this version i relied onthe speaker making beeping noises when a battery was low enough to remove it. in the newer version after discharging it remembers the amount of mAH drawn from it. the test version i had to scroll up and see what the alst reading was

Woei i did not receive any messages from the forum. But i missed out i see. Thanks for the ideas! For now main goal is keep it simple so 8 or 12 is still a thing so best thing would be pcbs of 4 so i could do any of those if needed. And thanks for the nice words to , it suprises me every time anyone can be so happy with a charger haha Ill post something when i know more still have a fight with the mechanics of the thing before even thinking of making pcbs

Hi everyone! (picture is of my previous charger) Well i received some calls and mails about the chargers i made in de the past. Besides me posting in the manufacturing forum i am just a normal dude making them for fun and maybe some profit on the side. But that was never the intend when i started it, i build the first version just for a friend of mine. Now after making a few, i come to the conclusion that if i would want to provide chargers i need to change things up, first off the electronics are not being made anymore and besides that the quality of the supplier was rather random (that's why i tested all chargers beyond normal before i shipped, even then failure is always an option ;), it just minimizes it) i am on the verge of creating my own circuits, but the attempt on making everything modular is a problem, i cant figure out how to make it as i imagined, and i guess i must know my limitations in what i can do all by myself. so i am going for a simpler approach that will get the many hours i spend on one charger down. it will be at the cost of the design(aesthetics) i made and liked rather well. but assembly is such a **** i really need to ditch that. So my vision is a simpler design with less components and bigger prints that will house all the separate charge circuits i need, to cut down on labour to be able to still make nice chargers that are not 1200 euro But now comes the question(s) how many slots would fit a normal user ? i was thinking about redundancy, i made some 6 ,8,12 one 14 and even a 16 slot version so far. but is it really a benefit to bed on one horse ? what if the 16 slot person would buy 3x 6 slots ? or 2 x 8 slots ? 1. what do you think ? if i would make one basic slot configuration how many slots should it have ? and what sizes (ex charger brick) would be acceptable ? so far in my design a 8 slot witch would fit most people with ease would be around (not completely finished of course thats why i ask ) 15 cm x 6cm ex adapter. 2. As for indicators, many designs use one light guide to show either green or red. what about 2 light guides positioned at either end of the battery ? so you can see if something is finished even by not seeing the color ? bottom led on ? its ready top led on ? still charging. 3. Charger current ? i used 400 mAh charger current , the Np50 allows for 1C charging (1C means 1 x capacity of the battery as charge current)... i would not dare to go there and charge it with 1000mAh for reasons like not every Np50 is 1000mAh to begin with. so i thought about lower, but if i only use 8 slot for each power brick i could increase the charge rate to 600mAh that would finish them 1/3 faster. let me know what you think. no one uses np50's with capacity lower then 800mAh so we are far below 1C and thus safe. Well the input would be very helpful, before i decide things that might be stupid, since lets be honest i dont use them daily ! Kind regards, Joppe Peelen

yes new design will not use 2 fingers but will clamp it over the length. so you wont be having that problem also it is gone be loaded like a regular charger a hole that is the size of the battery as in the video. just mehcanics i wanted to try. not what im gone use but it is the idea

Hi Constantin all fine ? Well i am afraid that would be to difficult for me but as you can see you get a fit rather quick that wont loosen the battery as is im working on my v3 charger first i have to make a version that works mechanically as i want with ease of construction (and size since most buy one because of this feature) in mind since for me it was going wrong there in the one you own they look nice i think but , its hell of a work fiddling with all these parts. then speak with a guy that would be able to make me some PCB's same specs as before at least thats the goal as for now im relaxing of the week working tomorrow another day.

nice ! it looks great !

WOooeii thats awesome ! thanks Jim , and thanks for the photo ! ill hope you enjoy it and it anyting happens dont hesitate to give me a ring !

CHeers !

haha i sold my dt48's with a big smile on my face i ahted them. i even had the old versions like from the 70's at my film academy i once found some racks in teh hallway , and i asked what is going on with these racks with old stuff on it ? they said it is gone be trown away... i was oooooh okeej. i took 3 hald dt48's from the same year and made oen good pair and some transformers and some minidisc mixers i actually took everything i could transport by train haha would taken more just because i think it is a waste to trow it all in the garbage. apparently other students did not take much interest ,so allot ended up in the container anyway

Well i was playing around with this contraption. after a long time i finally at least started testing tiny ideas i had for a project that keeps coming back at me. (in a good way) 3 guesses what the purpose might be i kind of spoiled it in the video but ok Its about holding strength and how it feels (mechanical feedback) since i am no engineer i do it the old fashioned way.. just make it and see what it does This is of course only proof of concept and the thing is only made to just test how it feels and what i should consider to change in the basic design. since i cant model this. now i can measure how far the plates need to be to get the mechanical feedback i want (only for this particular material used in the test)

Thats great to hear ! its nice to hear it works out ! if you could make some pictures if you got the time. when it is working i would be happy to receive some. since i like to make a gallery or something. i only have static pictures

this is the most standard crimp on BNC.. problem with these are the strain relieve (the crimp on portion) is rather small in length, an what almost every time happens is the cable will be still sitting fine in the crimp part. but since bending the cable outside the strain relieve still inflict tension on the inner core it will end up breaking near the solder joint. after a while the just get ripped out of the strain relieve to.. they shoudl have added a rubber strain relieve after the crimp part so it wont be able to bend so much that it is pulling on the inner core

best would be punching.. but such a large hole might be hard to get a die for cutting is an option but you either have to stitch the edges, or depending on the material go beserk with a lighter melting the edge so it wont unravel. not the most pretty way but it works !

Haa that looks really nice !!! this is exactly how Cinela worked i rem member the guy that started it all talking exactly about this shape he made for a soundguy wanting a small blimp for a documentary , his first blimp I am following this one !! i dont have use for blimps myself anymore but hell who does not like a really nice done propper DIY adventure ! Haha yeah its exactly not as you expect hehe noticed that to thank god there is such a thing like post.... and maybe some phone calls hehe or i would be screwed

must add they where not made for professional use (obviously) just as entertainment