|
this is a wooden box that I'm building with a big fuckoff deep cycle marine battery inverter to give a small amount of ac power, 400 watts sustained also has a combination boost/buck constant voltage power supply so that no matter how discharged the battery becomes it should give a constant 12v (within reason, not more than a couple of amps) to power some LED strips  the outlets are weather resistant and installed in an in-use outlet box   the white-ish box in the lower right hand corner is a PWM controller attached to the constant voltage power supply so that the LED strands can be easily dimmed  i also have two 12v marine/water resistant outlets for whatever   and lastly a couple of these  basically this is a self contained power center for when i go camping at music festivals and poo poo, plenty of juice to charge phones/whatever, run basic AC appliances (mostly a small logitech speaker setup for campsite music) and dedicated 12v for my led strands for campsite lighting 30 TO 50 FERAL HOG fucked around with this message at 09:07 on Mar 15, 2015 |
#
¿
Mar 15, 2015 09:01
|
|
|
|
| # ¿ Apr 27, 2024 15:59 |
|
|
unpacked robinhood posted:needs a u-lock and a big fuckoff chain to the nearest tree already done it will be varnished to keep it waterproof
|
|
#
¿
Mar 15, 2015 15:44
|
|
|
Sniep posted:ya i was gonna say, you might be better suited by an AGM battery instead of the 31HC commercial battery next time if you do 'deep cycle' that one to death. i figure that one in there has what, 180-190 minutes reserve capacity? so 75Ah @ 20 hrs ish capacity? where you can get a AGM of the same size (bci group 31) with >120Ah capacity at the expense of Cold Cranking Amps (Which i figure your box doesn't need massive bursts of power like starting boat motors.) ((And the expense of dollars cuz it will cost a bit more) noice the battery was cheap as hell from a junk yard and is only about 80% original capacity but when I do switch it out I'll grab an agm normally yes cca is unimportant, we did jump a camping neighbors car with our battery last year but we could have just as easily done that with my actual vehicle while running And yeah I do have an indicator to check the battery status, just not installed/visible in the pictures yet
|
|
#
¿
Mar 16, 2015 05:11
|
|
|
its finished but i don't have pics v2 will happen soon, smaller box leaving more room for the cooler portion, waterproof box to put your phone in with a charger          power is a 8Ah SLA battery, speakers an amp are marine grade lasts an entire river trip and keeps my beer cold!
|
|
#
¿
Mar 24, 2015 01:43
|
|
|
festival box update, decided to name it the "juice box". girlfriend approves    bluetooth receiver to make the campsite speakers wireless, headphone jack and 12v jack for the light strands wired a pot up to a PWM circuit to control brightness just did the first coat of primer, probably will do another coat and then attach the lid
|
|
#
¿
Mar 30, 2015 03:33
|
|
|
that seems unlikely off gassing is minimal when discharging unless you've got a pretty beefy load charging is more of an issue but the lid will be open when charging so it'll just vent into the air
|
|
#
¿
Mar 30, 2015 03:44
|
|
|
nah just a couple of large handles
|
|
#
¿
Mar 30, 2015 05:10
|
|
|
I mean it basically gets sat on a table and doesn't move all weekend so who cares
|
|
#
¿
Mar 30, 2015 05:34
|
|
|
Sniep posted:fair enough i guess, i'd still just put a pair of pegs and a pair of rolly casters on the rear end end of it but your prerogative I did it last year with a slightly smaller battery and it lasted the whole weekend with enough juice to jump start a camping neighbors car if needed I'll start my car and hook it up with jumper cables to get some charge in it but long term I'm thinking about getting a 100w solar panel it's not like it's being used all day. you get up, listen to some music for an hour or two while you make breakfast and the same when you get back and make dinner. plus some phone charging. 30 TO 50 FERAL HOG fucked around with this message at 06:50 on Mar 30, 2015 |
|
#
¿
Mar 30, 2015 06:34
|
|
|
Corla Plankun posted:build a nockoff openROV and then sell it to me so i can explore whats left of austin's hosed up lakes without having to look up from a laptop screen ever its more like pond travis now
|
|
#
¿
Apr 9, 2015 05:19
|
|
|
festival box update decided to add a way to charge the battery on the go   i needed a way to easily connect the panel to the charger located inside, something that could carry plenty of current, was waterproof, and wouldn't come out accidentally decided on a trolling motor plug, they're marine (obviously), turn to lock, and are rated for 30 amps. way more than the 8 or so ill be getting out of the panel   also added some fuses, the wiring looks like rear end but I'm going to redo it all with 10 gauge anyway 
|
|
#
¿
Apr 14, 2015 02:47
|
|
|
Sniep posted:haha thats the exact same $170 amazon 100w monocrystalline kit that i got i was getting 20-21v with no load, closer to 18 under load it works as far as i can tell, ill hook up the multi meter and measure the output later this week and see what i can expect in terms of real world output
|
|
#
¿
Apr 14, 2015 03:06
|
|
|
Sniep posted:i posted a pic dump in the ham thread of mine just a few days ago nice too bad i don't live in nj http://www.ebay.com/itm/Golf-Cart-B...=item33a0bcb672
|
|
#
¿
Apr 14, 2015 03:38
|
|
|
what about a core charge? assuming they haven't been repeatedly discharged i doubt theres anything wrong with them in terms of the internals ultimately ill be replacing this old junk yard battery with a sla or an agm like we talked about a while back, depending on what can be found what sucks is that all of my sla batteries tend to come from goodwill in the form of donated ups' and now that I've moved to bumfuck, virginia i haven't found any in a while edit: https://www.youtube.com/watch?v=PbCA8RZqeqk poo poo like this, why can't i work somewhere where they're like "oh yeah you want 1000ah worth of batteries? 40 bucks" 30 TO 50 FERAL HOG fucked around with this message at 04:26 on Apr 14, 2015 |
|
#
¿
Apr 14, 2015 04:19
|
|
|
so I've already begun version 2 of the festival box even though the first one isn't done yet I've picked up a bunch of dead SLA batteries and refilled them and tested them to see if they will hold a charge   gonna stick them in one of these  id 3d print a layer/enclosure for the circuitry but i don't have a 3d printer, so fiberglass it is
|
|
#
¿
Apr 27, 2015 08:25
|
|
|
any of you spare time project people have 3d printer recommendations? prefer something that isn't kickstarter vaporware
|
|
#
¿
Apr 30, 2015 06:30
|
|
|
nah still hosed
|
|
#
¿
May 3, 2015 04:56
|
|
|
taman shud http://imgur.com/gallery/EzTSu
|
|
#
¿
Jun 2, 2015 02:55
|
|
|
Jonny 290 posted:holy poo poo I'm looking at making an auto battery cutoff meter, what program are you using? eagle? what libraries are you using for your parts? its really ridiculous how expensive the things are, 40-60 bucks depending on where you look i can build one with a comparator, a couple of resistors, a transistor and a relay for like $10 30 TO 50 FERAL HOG fucked around with this message at 17:21 on Jun 3, 2015 |
|
#
¿
Jun 3, 2015 17:18
|
|
|
any circuit wizards willing to give me some advice? I'm looking to create a battery shutoff switch, using the MAX917 as a comparator and a relay that can handle about 50 amps i found this online, which seems like a good place to start, but the transistor used obviously can't handle the kind of current i need, can i drive a relay directly with the output from the MAX917? should i drive a transistor from the output from the 917 and then use that transistor to switch the relay? 
|
|
#
¿
Jun 8, 2015 04:21
|
|
|
well it depends on the relay. but I'm guessing that's probably not going to be enough. I'll just use a transistor to switch the power for the relay coil
|
|
#
¿
Jun 8, 2015 04:29
|
|
|
yeah yeah, i guess my question really is "does this seem completely stupid and the wrong way to do this"
|
|
#
¿
Jun 8, 2015 04:31
|
|
|
i did see some of those when i was searching mouser the downside is going to be the package size, to-220 isn't exactly tiny. not to mention using 4 of them cost could also matter, if i can use a 50 cent transistor and a 5 dollar relay, i might rather do that instead of 4 x $3 transistors
|
|
#
¿
Jun 8, 2015 04:34
|
|
|
http://www.mouser.com/ds/2/418/NG_DS_V23201-X0000-A001_0212_201_0212-540298.pdf 800mA coil current, prob a bit much for that little max917!
|
|
#
¿
Jun 8, 2015 04:42
|
|
|
nice job battery box bro I'm actually about to make v2 which is gonna be a lot like you have, i was planning on using 2x 35aH U1 also but wasn't sure which size battery box to get. think i may go group 31 http://www.amazon.com/gp/product/B00EOX2OKS/ref=ox_sc_sfl_title_4?ie=UTF8&psc=1&smid=ATVPDKIKX0DER
|
|
#
¿
Jun 10, 2015 20:51
|
|
|
i mean, just by looking at the dimensions I'm 99% sure that group 31 will fit but yeah ill have to wait until it actually starts coming together
|
|
#
¿
Jun 10, 2015 21:09
|
|
|
yeah it's a real shame that battery tech is still ancient I try and buy any old sla batteries I can find from busted ups' and stuff lots of them just need some distiller water or electrolyte some others just need a few days on a high voltage high frequency desulfator. so far I've only had one totally dead battery that was shorted internally and one with a marginal cell
|
|
#
¿
Jun 10, 2015 22:16
|
|
|
Sniep posted:p.s. it wont, i just got a 31 box out of curiousity and nope where'd you go to find one locally?
|
|
#
¿
Jun 11, 2015 01:25
|
|
|
Sniep posted:from amazon, i ordered it a few days ago. yeah, i wanted to get an mppt controller for mine, but they're just so drat expensive
|
|
#
¿
Jun 11, 2015 02:08
|
|
|
Sniep posted:dude i have not found a single thing yet, and i googled hard. like a wheelchair parts store notes it as an optino of a custom made part haven't done any work on it recently. my next guess would be to hit up Walmart and find a plastic storage container that's about the right dimensions
|
|
#
¿
Jun 16, 2015 04:39
|
|
|
there's not a lot to arc welders. if it's got a variac in there you can always rip it apart and upgrade the transformer or rectifier with something a bit more appropriate granted this is coming from a guy who's arc welder is a couple of rewound microwave transformers in a wooden box
|
|
#
¿
Jun 17, 2015 14:11
|
|
|
 juice box in action. dj set up in the middle of a field
|
|
#
¿
Jun 18, 2015 00:02
|
|
|
Mido posted:those speakers lmao unfortunately the 1000 watt pole mount speakers would probably kill the battery in about 5 minutes it works well enough for the size of the camp site
|
|
#
¿
Jun 18, 2015 16:59
|
|
|
 after four days with it being pretty cloudy for two. the percentage is a little misleading because there is no load on the battery but still not bad
|
|
#
¿
Jun 22, 2015 01:11
|
|
|
Doc Block posted:quoted just so i can see what this is sorry. I'm on mobile. poo poo doesn't scale properly
|
|
#
¿
Jun 22, 2015 01:23
|
|
|
Sniep posted:re: my dumb battery box for poo poo like this I take my calipers and measure the exact size for the hole and then make a jig that's the size of the thing to be cut plus the size of the hole set your piece in the jig and then trim it out using a router table granted it's easier if it's a flat item
|
|
#
¿
Jun 22, 2015 12:18
|
|
|
so. group u1 battery storage http://i.imgur.com/L4Rpgb5l.jpg http://i.imgur.com/Jxo9Qqql.jpg they were also replacing all of the emergency lights and their batteries while I was at Walmart. they would not let me take them
|
|
#
¿
Jul 2, 2015 21:14
|
|
|
A Yolo Wizard posted:this guy bought an ARF immersionrc vortex for $450 and put an orangerx on it lol this is so dumb. why make something like this to sell and then not include a receiver? but apparently it does come with a controller? what
|
|
#
¿
Jul 3, 2015 03:41
|
|
|
hey circuit wizards http://www.mouser.com/ProductDetail/Fujitsu/FBR53ND10-Y-HW/?qs=sGAEpiMZZMtGt%252bn33CgIPzn1WXaKo2DVuYyDHZxc2Wg%3d I'm doing a thing with a relay, how the hell can i carry 30 amps on a pcb? why is there not a relay with through hole mounting for the signal and screw terminals/spade terminals/whatever for the load?
|
|
#
¿
Jul 6, 2015 19:55
|
|
|
|
| # ¿ Apr 27, 2024 15:59 |
|
|
Bloody posted:he may be cool but i'd rather be dead than listen to him talk for more than a minute its like a caricature of an austrailian person i expect him to talk about putting shrimp on a barbie and how much he hates abbos but yeah his videos are really cool, the video on op amps finally helped me understand them because he uses plain english and then slow starts introducing more and more technical terms and aspects rather than just dumping it on you
|
|
#
¿
Jul 7, 2015 15:12
|
|