Search results

I'm building a control cabinet for my security camera system, it's all 12 volt (Yes, I know I should have gone POE, but the cameras I had purchased were all externally 12 volt powered), so to save money I went with those and ran my relatively small house with 12 gauge wire and cat5e to power...

I took apart a microwave, because it's not in my nature to throw anything broken away without disassembling it and seeing how it works first. Don't worry, I have absolutely no intention of powering it up. I'm going to use the copper coils for another project instead. Here's the transformer...

I dropped a key ring while I was leaning over to check the status of my batteries, The keys fell out of my pocket and landed just millimeters away from bridging my main two battery terminals. Lesson learned about giving the two terminals a little more space from each other. It's a 12 volt...

I have fun "fixing" and rebuilding things that don't really have much of a purpose. Just kind of gives me something to do, and gives a second life to an otherwise trash product. My most recent endeavor was soldering a bicycle tire valve onto the bottom of one of those air duster cans, you can...

I'm building a case that houses all of my DC components for my security system and lights, The case uses a relatively large server power supply unit (80a) and definitely produces some heat. I've added two fans on the top, and one on the bottom (as well as the additional hole that's there...

I found an old lightning arrester outside in a pile of old junk wire from the previous building that was here. It looked just like this, I wish I took a picture before I smashed it with a hammer. I think it may have been this exact one, or at least the same brand. Here's what's inside, my...

I'm building a new battery for my son's power Wheels, apparently people who run it off of their 18 volt tool batteries report that there's too much voltage and there's problems with gears stripping. I've replaced the old 12v SLA it came with with one of my small lithium packs, and it makes a...

I'm installing a security camera system, and need to run a whole bunch of 12 volt and ethernet wires , the ethernet and power will be running through two separate conduits, from a box on the wall, into the ceiling. I finally convinced my wife to let me do this, under the condition that there's...

I'm trying to clean up my modem and router area, I'd like to put everything into a neat looking, low profile, wall mounted case. Most of the "pretty" cases are made out of metal, or some other type of material that blocks the ever-loving sh*t out of a 2.4 ghz signal. I'd rather not put...

I placed an order a few weeks ago, and got a refund notification from my bank a few days ago. It would appear that they attempted to do a tracking scam, but were caught by AliExpress. They initiated the refund, I didn't even notice an issue.

Look at those exposed bus bars, I hope he's got a real good grip on that wrench (suction bulb). Apparently this is from a WWII sub. Capacity is about 2.6 MWh. 126s, 2v per cell, 5320ah, X 2 sperate banks. Also found a cool photo of an oldschool "BMS" used onboard subs.

My 4runner has been up on jacks for about a month with some transmission problems, and I haven't charged the battery in that time. It's a standard-FLA starter battery. It reads 2 volts, and when I hook my bench power supply up to it it won't take more than a half amp. I connected the power...

Most baby toys take multiple C or D cells in series. They run about $1 a piece, and "can't" be recharged. I was able to recharge then about 3-5x using a bench PSU and a VERY low charge current (75ma), but it takes forever, and you loose about 30% of the remaining capacity each charge. One of my...

We have a ton of big storms with lots of lightning, and live on the highest point in the area. I also play with things that plug into the grid, so a local surge is always possible as well, and in fact might be more probable than a lightning strike. I've been looking at the Siemens and Eaton...

https://news.energysage.com/floating-solar-what-you-need-to-know/

My Mother-in-law's dryer stopped working. Pulled off the back power panel, and found this. A combination of, what I assume is, corrosion from the moist environment, and a loose strain relief caused a hot wire to somewhat slip out of the crimp terminal, spark and melt under load, until it finally...

Found this cool article about compressed air storage. It sounds a bit similar in concept to pumped water storage, but wouldn't require a height differential. The tanks may be large (much smaller if many smaller ones are used, I guess), but that could be offset during construction of a home...

Title says it all. Seriously, I love this forum, and the mods keep it running smoothly. I appreciate that you ASK me to change a post that is perceived to be insulting, rather than changing my words, or removing them. I appreciate that you let conversations take their natural course, even if it...

I want to measure the real time, and accumulated, power that my house uses. I have 200 amp, 240v, split phase coming in. I really just want to use simple ammeter like I use on my battery box (pic below), just watts, volts, amps, and watt hours. The problem I'm having is that I can't find...

I found Blu-ray player on eBay for about $10. It didn't include a power cord or remote. The off-brand remote was $6 more. I figured I'd just use one of my many 12 volt, 2.1mm wall warts to power it, but NOOO, Sony just had to make the barrel plug proprietary, and a new adapter cost about as much...

I had absolutely no idea. Enjoy!

Crazy.

Found this bad boy in the wild. It's below sea flood level, mounted to a tree, and is county property, so someone must have thought this was code. ?

These cells will EASILY push over 20c during a short circuit. This was a single 3.2v cell, imagine a 12v-48v pack with paralleled cells. When the ROMEX got too hot, it melted the insulation inside of the sheathing, and caused an additional, "internal" short. All it takes is a few seconds to...

I want to do a max discharge test, and need something that can measure current (via hall-effect) and voltage, and log the data vs. time. Preferably on PC, but if I can export from an Android app that's fine. My budget is around $150. Thanks for any help!

What a sweet find!

Hope it helps someone! Edit: I learned the hard way to make sure that the room you are testing cells in stays a constant temperature. I had mine running in the garage, and it stayed open in hot weather for a few hours. All of the cells during that time tested a few percent lower.

I'm in the process of converting a small tow behind trailer into a camper. It had an unpainted aluminum roof that would get up to 160°f on the surface, and heat the internal temperature of the trailer to well over 120°f. I have fans inside, but no AC; so in the sun it's completely miserable. I...

I'm looking for a YR1035, YR1035+, or something equivalent. I'll happily pay whatever it cost you from AliX (or wherever), plus shipping. I have some cells that I need to test, and don't want to wait a month or two for a tester from China, nor do I want to spend over $100 to get it...

I have placed 3 separate orders with Daniel from ThriveEnergy. Every single one has been a good experience. I received my first order (end of 2019, 8 CALB cells) in less than 50 days, the second order (end of 2020, 16 EVE cells) in about 2 months, and some BMS's (mid-2020) and bus bars came in...

I finally got the OK from TopBand to mount these cells on their side. They fit perfectly with packing foam wrap. Cost about $100 total. -25 Ah LiFePO4, 4s (~$60) -60 Amp Daly clone BMS ($30) -10 Awg silicone wire -Fuse ($2) -Crushed copper pipe, bent 90°, to keep the box watertight while adding...

Just want everyone needs, another potential grounding issue! Here goes; I modified a Dell Z750p 63 amp, 120v to 12 volt server power supply to feed a 40 amp Renogy DC-DC converter, for a "shore power" connection of sorts. Mains power --- Dell PSU --- DC to DC converter --- battery ---...

Stumbled onto Green Rhino Energy's site earlier today, and saw some interesting claims in the FAQ. ------ -Can a Crystal Battery™ be discharged a 100% Depth of Discharge? Yes, Crystal Batteries™ can be discharged in full frequently, even to 0 Volt. This makes Crystal Batteries™ extremely...

I've gotten pretty good at making bus bars for the 25ah cells, and figured I would offer my services. 3 for $15, free shipping. I will have to make to order, so it might take a few days for larger quantity. If you need a bunch we can work out a deal. -2.15 mm thick -41.52 mm long -24 mm wide...

I'm going trailer camping in a few days, and I wanted a shore power connection for my trailer (180 ah, 12 volt, LiFePO4) without spending much, because I won't use it very much. I already had a 40 amp Renogy DC-DC charger, so I figured I would use that as a starting point. I found a pair of 750...