465 Results
[QUOTE=quincy18;52779406]Does anyone know what kind of power plug cable I need to buy for this power supply? I can't find which type of cable this is... [url]https://imgur.com/a/rjjgp[/url][/QUOTE] Does it happen to be a high wattage power supply? Because it seems like...
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[QUOTE=DrDevil;52732346]I keep watching those fucking scanimate demo reels: [media]https://www.youtube.com/watch?v=ispW6-7b2sA[/media] And I keep thinking to myself: Couldn't something similar be built with modern electronics relatively easy? I'll keep you guys posted...
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[QUOTE=F.X Clampazzo;52665145]Well with a Teensy you'd be able to build the keypad for much cheaper, which was my entire point, the 8bit one is only $16 and you'd be able to build a keypad for rather cheap on top of that. idk how else to help you because as it seems you've don...
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[url]https://github.com/EionRobb/purple-discord[/url] For those of us that's stuck on the edge of equilibrium between thinking IRC is for old nostalgic geezers, and that current trend with round avatars and proprietary [I]APP EVERYTHING!![/I] is equally retarded.
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[url]https://www.tech-n-hack.net/2016/05/making-a-din-to-bnc-adapter-for-the-c1-94[/url] ??
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[QUOTE=pentium;52395726]So you get to spend 12 hours walking around with a FLIR and watching the lines sag?[/QUOTE] I've had the same gig at a large lanparty, except with a IR thermometer monitoring temps of junction boxes.
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[QUOTE=daigennki;52306178]I am trying to design a power control circuit for Raspberry Pi, which connects power when a button is pressed, sends a signal to the Pi's GPIO to shut down if it is pressed again, then disconnects power once the Pi has shut down. Here is what I have s...
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[QUOTE=Zero-Point;52125288]Plumbing solder isn't meant for that sort of pressure, it's much too soft. You can easily make sharp bends in plumbing solder to fit hard-to-reach places with your bare hands, you [I]need[/I] pliers to do the same with Silfos brazing rod. Silver so...
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[QUOTE=thefreemann;52037570]Er, I just need them to all light up at once, so I can just control them with one pin right?[/QUOTE] I'd use a appropriate N channel mosfet to control the negative/ground of the LED's, but yeah, if they all need to light up simultaneously then o...
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[QUOTE=F.X Clampazzo;52033294][IMG]http://i.imgur.com/TU7oQI4l.jpg[/IMG] You know you're working on something old when the instruction manual finds it pertinent to inform you that the device has transistors in capital italics. It's stereo so it's gotta be late 60's to early...
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[QUOTE=supervoltage;51940379]The microwave oven that's in my apartment broke down and the landlord said I can get rid of it. My question is what could I do with the parts from the microwave oven? A quick search for "microwave oven transformer projects" on Google only gives ...
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I'd ditch those TIP120's for some N-channel mosfets if you haven't purchased parts yet.
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[QUOTE=nikomo;51849365]You live in Canuckistan, you have a "stable" (over time) time source coming out the wall. Drop the voltage with a transformer and then build some sort of detector circuit - probably half-rectify the AC and then use a comparator.[/QUOTE] I'm getting ...
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[QUOTE=pentium;51845922]How much rocket science would need to go into a 555 circuit that runs off 5v and outputs a 60hz square wave at 3.3-5Vpp? I've found a diagram for doing 60hz as a sine wave but 555 timers are still an unknown for me. [editline]asda[/editline] Adding...
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[QUOTE=DrDevil;51761159]Keep in mind that you need to feed in the 5V at more than one point (for example every 3 meters or so), or else the voltage will drop too much over the strip. Especially at 25 amps. Additionally you could limit the cumulative brightness to something ...
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I'd crack open the power bank and check if it even has separate voltage regulators for each USB port, or it just hammers out 4.2 or 5 Ampere and the USB ports have polyfuses. But some powerbanks are a royal bitch to open without damaging.
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Is it safe to assume that the following pin-out: [t]http://s30.postimg.org/t6pepdldt/esp8266_flash_IC.png[/t] is true for almost all 8-pin DIP SPI IC's? Because I got a SMD SOIC clip that I need to solder some wires onto since it uses 2mm pin spacing, and it seems...
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Bought some cheapass Welleman butane soldering iron for when doing wiring repairs in cars and there's too far to a mains socket. Turns out it can also be used as a hot-air iron for smaller SMD components or shrink-wrap. You can forget anything about precise temperature a...
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[QUOTE=No_Excuses;51494352]So I'm going to install a remote-start module for my mom's car as a gift. The key has some RF tag built into it so the ignition won't fire unless it's detected... Here's the super high tech solution recommended by a lot of websites and people: ...
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[QUOTE=Zero-Point;51457705]So turns out that those cheap Tower Pro MG996 servos can, in fact, operate at up to 8.4V without bursting into flames, which is good to know. Also turns out that after less than a minute of this the outer casing gets pretty warm. (like 122F+ warm) :...
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[QUOTE=Chryseus;51437827]Most chargers just provide 5V and leave the data lines disconnected.[/QUOTE] It'll only charge with 500 mAh, but that's the 'default' charging behavior. [URL="https://en.wikipedia.org/wiki/USB#USB_Battery_Charging"]If wikipedia isn't lying, then...
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The cheapskate method is to (ab)use the natural voltage drop of a regular rectifier to drop the voltage, so two ordinary silicium diodes in series will drop 5volt to around 3.6 volt. [editline]6th November 2016[/editline] But I know some devices need to be fooled about the N...
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[QUOTE=Staneh;51226857]Just finished my pedal board, what is the easiest and best way to cut this without breaking everything off in little pieces? (veroboard/stripboard)[/QUOTE] Dropbox doesn't like being a Image Host anymore, but I'd say cut a deep groove on both sides w...
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Is there any 2-in-1 hot-air reflow and "traditional" soldering stations that are cheap without being absolute crap? Been checking out those Chinese 858D hot-air reflow stations on eBay & similar, which seems good enough [URL="http://www.eevblog.com/forum/general-chat/deadly...
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[QUOTE=Fourier;51121291]yeah power supply will work at 100% all the time, forgot this fact. thx vanman[/QUOTE] I know worst case from personal experience :v: It didn't croak immediately, but after about 2 years it ended up literally blowing up a [URL="http://www.futurle...
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[QUOTE=proboardslol;51118438]What happens if you've got a 12v 2A Power supply and have some LED strips rated for 12v 6A. Will the output brightness just be lower than it possibly could?[/QUOTE] Worst case: power supply will croak (especially if cheap wall wart). Best ca...
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[QUOTE=Staneh;51099775]With components or without?[/QUOTE] Without. IF assembled in china, then it's probably cheaper to use SMD components.
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[QUOTE=DrDevil;51005065]The mushrooms move, [url=https://www.youtube.com/watch?v=rtR63-ecUNo]just like in real life[/url]: [t]https://my.mixtape.moe/tjapnx.JPG[/t][/QUOTE] I feel like I should've been on acid while watching the latter part of that video.
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[QUOTE=gjsdeath;50934814]So, an electrical question. For [URL="http://garyjs.com/MicroMFD"]my truck data display[/URL]. I am going to have a pin from the fuel gauge goto an analog pin on my arduino. The voltage divider created by the probe and gauge actually keeps it under 5...
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[QUOTE=DrDevil;50890982]If you don't want to modify the output stage though, you could use a [url=https://en.wikipedia.org/wiki/Power_dividers_and_directional_couplers]directional coupler[/url]. If you take this setup for example: [img]https://upload.wikimedia.org/wikipedi...
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[QUOTE=gjsdeath;50801055]Also. That child's scooter is a bit difficult to control. I had put 3 drill batteries ( 63V ) into it. It goes pretty fast. Unfortunately though because of the binary throttle ( no throttle or full throttle ), I failed to properly accelerate into my tu...
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[QUOTE=DPKiller;50688047]20$ for a chinese copy of a IMAX B6 and 25$ for a genuine. That's expensive?! The LIPO batteries are more expensive than that when going for 5,000+ mAh. There are literally sooooo many chargers you can get as hammydowns from RC Car and RC Plane peop...
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[QUOTE=gjsdeath;50687503]You could. But also note that the capacity of most batteries is measured at the listed Ah, but is not a linear relationship when drawing more or less than that listed amount. For example. An 1500mAh battery will last for an hour discharged at 1.5 a...
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Either a single yet huge li-ion/li-poly cell and a boost converter (so it can be charged with a cheap lithium charger) or 4 cells in series (which requires a balancing circuit and a advanced charger or a cell holder) and a buck converter.
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[QUOTE=Goz3rr;50604758]So today I found out female RJ45 connectors meant for ethernet aren't just dumb connectors, they actually work like this: [img]http://i.imgur.com/nwSIlbw.png[/img] Which made the ones I bought completely useless[/QUOTE] Only some of them does, ...
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[QUOTE=proboardslol;50373123]Sorry for all these "does this exist" questions, but do mechanical water level switches regulate voltage or are they simple switches (on off)?[/QUOTE] Depends on the type. Those typically found in fuel tanks are potentiometers where the wipe...
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[QUOTE=Chryseus;50306199]Yes, although it's never good practice to use them anywhere near that, particularly with the cheaper Chinese stuff, the 12V rating seems bullshit though unless it has a LED inside it, even the smallest switches can easily withstand 48V or more.[/QUOTE]...
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[QUOTE=proboardslol;50193763]is 1.8A too high for the collector pin on a tip120 transistor? The absolute maximum is rated for 5A, which it says is still too high My transistors are getting hot[/QUOTE] heatsink it, otherwise go for mosfets, like the IRF540,
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I know this might be a longshot, but does anyone know of a heavy-duty replacement for Omron D2FC-F-7N switches? They seem to only last just over two years of use, and they're also used in incredibly many computer mice, ranging from both cheap shitty ones, to ones right below ...
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[QUOTE=Fourier;49900340]Yeah I tested, I have USB OTG cable and Keyboard & Mouse works excellent. I just want to know, if I 'hack' this cable, can I apply 5V on rails from power source, because I don't want that Android device runs out of power.[/QUOTE] I assume you bo...
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[QUOTE=Fourier;49900293]Hello EEngineers! Is it possible that I power device through USB port (Android phone) and this USB is connection to USB HID (Mouse and Keyboad)?[/QUOTE] if the phone supports [URL="https://en.wikipedia.org/wiki/USB_On-The-Go"]USB OTG[/URL] full...
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Dupont male-to-female wires. Ebay is your friend.
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[QUOTE=alexaz;49764682]If you want to etch super fast, you should try 35% H2O2 with 30% HCl ( % purities, not proportions ). I really have no idea why people are even touching ferric chloride. It is also reusable and has a decent shelf life if you keep adding H2O2 once it gets...
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[QUOTE=RoflKawpter;49741550]HELLO FOLK FRIENDS I'd like to upgrade the firmware on my monitor (see here: [url]http://www.blurbusters.com/benq/diy-firmware-upgrade-for-benq-z-series/[/url]) as apparently the new firmware is absolutely crap-tacular! I don't want to buy the...
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[QUOTE=Chryseus;49652204]I dunno why you'd use a FTDI chip in the first place, they're expensive compared to the CP2102 or CH340.[/QUOTE] literally plug&play on windows. But now people worry about counterfeits entering their parts supply line so much that going back to ...
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Guess I don't need to replace the capacitors after all. Turns out the TO220 packages surrounding the capacitors are Schottky diodes, but the one responsible for the 5v line were barely even attached to its heatsink. Desoldered both diode and heatsink & then unscrewed the...
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[QUOTE=ddrl46;49493559]The main high voltage filter cap right after the rectifier almost never fails in those kind of supplies fyi.[/QUOTE] That's both what I'm hoping and also suspecting, since the smaller "final stage" caps are sandwiched between some TO-220's bolted to ...
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Only problem regarding replacing them is that the main "pre-stage" capacitor is a 400volt 150uf bastard that's hard to find a equivalent of cheap, without being some shitty Chinese capacitor that's probably even worse than the current one. Also being rated for only 400v yet p...
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Isn't the telltale signs for failed capacitors that they are bulging at either or both of the ends and that they're optionally leaking, yet they can still fail without any visual indicator? Because I've currently disassembled my Asus monitor which had flickering that slowly...
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[QUOTE=Nightrazr;49446976]:godzing: I saw that one before somewhere but I couldn't ever find it again.[/QUOTE] As for audio connector, I presume you're only gonna run 2 RCA plugs (maybe with common ground), so 3-pin or 4-pin XLR connector and plug? [url]https://en.wikipedi...
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[QUOTE=Nightrazr;49446799] [B]What are some good connectors for a thick (1cm²) power and ground cable? [/B][/QUOTE] [url]http://s21.postimg.org/sgropd5xj/844907378_850.jpg[/url] They're the same used for charging the batteries of electric forklifts, so they can handle b...
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[QUOTE=papkee;49429113]That's why I love audiophiles who claim that tubes have superior quality to semiconductors, and that you can never get the same "level of detail" with IC's as you can with tubes.[/QUOTE] Ironically the problem with semiconductors is that they amplify...
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[QUOTE=Nightrazr;49415179]Just making sure to tell people NOT TO DO THIS. I did, it SUCKS.:ohno:[/QUOTE] Let me tell you this, being close to blacked-out drunk does numb the worst of the pain, but that also makes you do stupid shit like pissing right up a fence.
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[QUOTE=paindoc;49414967]It's a rite of passage for rednecks and country kids[/QUOTE] I though that was getting shocked while pissing on electric fence.
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[QUOTE=LoneWolf_Recon;49400642]a [URL="http://webpages.charter.net/dawill/tmoranwms/Elec_Compound2.html"]Class D Tube Amp[/URL] that works fairly well with an interesting tube-based PWM generator. And he tests 175V tubes on a breadboard... :what:[/QUOTE] I'm not sure ...
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It's just a stack of button cells in a fancy package: [url]https://en.wikipedia.org/wiki/A23_battery[/url]
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[QUOTE=false prophet;49386170]Ah, I see. I can't find really any adjustable drivers that don't have constant current functionality. Poop![/QUOTE] [url]http://www.ebay.com/itm/381462079734[/url]
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[QUOTE=false prophet;49384239]I will. I still have a bunch of high watt resistors from the last panel. I went with a 5w resistor for the lower voltage series and they got very, very hot. The other LEDs are working just perfectly fine, [I]for now[/I]. Also, what makes the co...
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[QUOTE=false prophet;49383956]Fair enough. That was an issue I ran into with my first light. I am looking at adjustable led drivers on eBay now, as previously suggested. They also seem cheaper than the LM338's that I was looking at, and a heck of a lot simpler to use. Anyo...
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LM338 & big honking heatsink [editline]23rd December 2015[/editline] [url]http://diyaudioprojects.com/Technical/Current-Regulator[/url]
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[QUOTE=Yahnich;49372035]are you sure about 700mA? most LEDs have a 40-60mA upper limit[/QUOTE] You can get high-power LED's nowadays, Cree and Philips are the forerunners, but there's semi-good Chinese generic copies that are good enough for experimenting and home hobby pr...
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[QUOTE=false prophet;49371796]I need a variable voltage regulator for my LEDs. I think I need it rated for 5 to 10A, I'm not entirely sure yet. Any suggestions? I have 3 LEDs in series that have a forward current of 700mA per LED. Does that mean the current draw of each serie...
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[QUOTE=nuttyboffin;49364658]Honestly if your looking to do things for an off grid home I would personally just replace the 230VAC in your house with the HVDC and 99% of things should run still as they all use rectifiers in them these days :P As long as you are smart about it, ...
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[QUOTE=Penguiin;49364117]ohhh ok. that seems like an even more niche usage and would prolly cost a shit load of money. even 1 phase inverters that create a pure sine wave cost an arm and a leg for even just 1000W capacity. seems like a fun project if you have lot of disposable...
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[QUOTE=Penguiin;49363779]yeah i agree. why do you need to convert 3-phase AC to DC anyway? For a welder? that's the only thing i can think of needing this and even 3-phase welders have their own AC to DC converters. playing around with this energy or power level is a great way...
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[QUOTE=nuttyboffin;49362319]Neither, you should just use a standard 3 phase bridge, that 4th one has no use. could you give us some information on why you need the 4th leg. for 3 phase you should never have an unbalanced load so the N is only to deal with small parasitic cu...
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[QUOTE=war_man333;49342754]Nixie tubes look soooo much better than 7-segs.[/QUOTE] So are Vacuum Fluorescent Displays, but they both are more exotic to 'drive' than LED displays.
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[QUOTE=DrDevil;49285615]Or check out your nearest hackerspace if they happen to have a cnc mill. That's how I get to mill my boards for the price of FR-4 copper clad.[/QUOTE] Would require that the closest one isn't almost 70 Km away :v:
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[QUOTE=DrDevil;49285514]Cnc milling boards is way better than mucking around with etching solutions.[/QUOTE] CNC mill costs more dole though, and also takes up more space. It's a good investment if you're in the serious end of the hobby scale or low volume rapid prototypi...
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[QUOTE=MIPS;49263432]It's times like that I throw the parts in the shower with a good brush and scrub them in a hot wash. Never fails.[/QUOTE] I can totally see you in a bathtub along with the boards of a old terminal that was used for a decade by a chain-smoker
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Would it be dementrial to asimple 230v AC ceramic heating element if it's powered by 230v DC instead?
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[QUOTE=Dorkslayz;48746138]Sure. I'm building a Quadcopter but i'm having a few issues with communicating with my [URL="http://www.hobbyking.com/hobbyking/store/__39708__Afro_ESC_30Amp_Multi_rotor_Motor_Speed_Controller_SimonK_Firmware_.html"]ESCs[/URL] via I2C. My Raspberry...
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[QUOTE=EthanTheGreat;48723892]Who needs a SVN... When you got a private FTP connection! :V That's how I commit. But I keep stuff to myself.[/QUOTE] You can also have a private SVN or GIT server. It's just that GIT or SVN takes care of the versioning fluff for you.
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[QUOTE=Nightrazr;48682337]Is there a way for me to use the copper on copperclad board as an antenna for a 433mhz transmitter?[/QUOTE] Pretty damn sure that's what they do with many wireless products. You're gonna have "fun" designing the antenna so it actually works for y...
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[QUOTE=nuttyboffin;48674286]My Aunt has a kid with down-syndrome that keeps escaping down stairs to watch frozen at midnight... She wants an alarm so she gets woken up when the kid leaves their room. ... would this do? [url]http://www.ebay.co.uk/itm/White-Shop-Door-Bell-...
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[QUOTE=Robotboy655;48673523]The point is, they still do that.[/QUOTE] That many stupid people? Damn...
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[QUOTE=Robotboy655;48673062]Because people keep reuploading the game content to Steam Workshop and other places I would guess. The Workshop was made to host mods, not rehost Steam games.[/QUOTE] Don't you already ban people on the workshop who do that?
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[QUOTE=Handsome Matt;48666614]Um, care to point out where anybody from Facepunch has said they'd use Source 2? In fact RobotBoy has actually said it most likely won't even mount game content from Source games (because Valve dislike it) so what's the point of using Source 2?[/Q...
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[QUOTE=Intoxicated Spy;48664545]Maybe I am crazy, but full controller support. I some times like to sit back and stream games to my shield, it would be great to use menus in sandbox to do stuff.[/QUOTE] Gmod still doesn't lend itself to controller support, since it often r...
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[QUOTE=Chryseus;48645197]Modern LEDs are much brighter, many exceed 100lm per watt so 5W can give you over 1000lm. For a grow lamp you need at least red and blue LEDs, with around double the number of blue LEDs since they are less efficient than red.[/QUOTE] Also just buy...
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[QUOTE=pentium;48547924]Finished. [img]http://i11.photobucket.com/albums/a166/ballsandy/Computer%20related/IMG_0763.jpg[/img] The bamboo cabinet the thing came with is really shit though. I wanna see if I can make it rackmountable.[/QUOTE] So are you gonna mod the rP...
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[QUOTE=cartman300;48539770]I don't need a rotary encoder. A simple switch that actuates once (or multiple times) each turn is enough as i already know the direction the motor is rotating in.[/QUOTE] it's not gonna be very precise at all, those switches are used for car doo...
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[QUOTE=cartman300;48539092]Okay, so my dad and me are building a CNC machine. We already completed the frame and put on the motors. We're using car door glass DC motors for the X, Y and Z axes. I'm going to do the controller electronics and programming for it. I'm using a cus...
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[QUOTE=Cakebatyr;48536181]I was considering installing an earth grounding rod outside my apartment in a bush (under the cover of night) and running a wire from my room (2nd floor) to it myself...[/QUOTE] If you're ghetto, then bolting it to bare betal of the water plumbing...
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[QUOTE=Zephyz;48508431]What are some interesting things that have been done with a teensy++ 2.0?[/QUOTE] Emulating USB peripherals. wanna build a joystick/joypad, keyboard or mouse from scratch? well a Teensy (or arduino leonardo) can be a key part.
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[QUOTE=Fourier;48423022]I copy pasted this picture from the internet. Power supply is wrong yes. Maybe that R2 10 Ohm resistor needs to go to base of Q1 instead? Thanks for the tips[/QUOTE] Something along the line of this would be better: [t]http://www.element14.com/comm...
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[QUOTE=LoneWolf_Recon;48341497]Agreed, maybe we should tag battery charging in the same realm as working with AC. "Don't do it as a beginner"[/QUOTE] Lead acid batteries are fairly forgiving, given that they're only used in a well vented area. Oxyhydrogen gasses and such.
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[QUOTE=pentium;48310067]There has to be something simpler than a 555.[/QUOTE] That is not a sentence you hear everyday.
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[QUOTE=Cakebatyr;48117959]Electrical tape to the rescue![/QUOTE] My case had a blue power LED that required 12 layers to dim it enough so it had the same brightness as the green HDD activity LED. Goddammit NZXT
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Rosin in itself is a sticky mess, there's a reason handball players smear it on their fingers, and that's so they don't accidentally drop the ball.
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[QUOTE=pentium;47895995]It IS magic. It's helped me in situations where pin density made it impossible to otherwise prevent bridging. [B]The only downside is that it's generally a bitch to clean off.[/B][/QUOTE] Isn't that where rubbing alcohol and a soft toothbrush is godsend?
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[QUOTE=papkee;47887371]Interesting question - how would I go about finding a legitimate FT232 breakout on ebay? For this DMX controller, I think I may have gotten a fake one because it cuts out after a minute or so and won't communicate unless I power cycle it. [editline...
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[QUOTE=christarp;47871257]Alrighty folks, I've got a question for you. Now I haven't taken circuits or physics or anything really so what I know has come from a brief period of looking around the internet. I'm looking for a way to take a small line in voltage from a stereo and...
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[QUOTE=MIPS;47867556]My scooter just had a massive resistor that pulled down the lamp voltage. I left it unplugged once and blew every bulb in the scooter :v:[/QUOTE] I've seen examples where it was a chunky zener diode & resistor bolted to a heatsink, one of them was on a...
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[QUOTE=Staneh;47847370]So I just bought a motorcycle and I need to fix some things with the lighting, basically when I start gassing the light works just fine, but when I reach top speed, the lights in the motorcycle burst because there's too much current being delivered by th...
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[QUOTE=Cakebatyr;47846319]What networking devices run on 12V? How many amps do you need? Can you get away with 13.8V? If so you might want to get a [URL=http://pages.ebay.com/link/?nav=item.view&id=151682660677&alt=web]used Astron SMPS[/URL] off eBay. They are designed with...
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[QUOTE=nikomo;47833184]I figured I'd make something temporary whilst I think about power supply design. [t]https://i.imgur.com/ArXO8Kx.jpg[/t] 19V ASUS netbook charger, to boost converter with 27-30V output, to buck converter that gives me whatever I need. No current limiti...
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[QUOTE=LoneWolf_Recon;47750828]I don't see why not, just upload a blank sketch and then hook up the serial pins to Pins 0/1 of your arduino. [URL="http://hackaday.com/2015/03/18/how-to-directly-program-an-inexpensive-esp8266-wifi-module/"]Wonderful guide[/URL] along with some ...
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[QUOTE=Zero-Point;47733475]You say that, but I'd love to go back. First attempt at college resulted in failure due to burn-out (the American educational system is poop, but New Mexico's is terribad), and couldn't afford to go back since. Awkward considering I had to install an...
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[QUOTE=Leestons;47731857]I'll just sit here with my firestick. Works fine for my needs. [img]http://ecx.images-amazon.com/images/I/318g70KoLhL._SX300_.jpg[/img][/QUOTE] I have one of those. It's been used so much the chiseled shaped tip is now pencil shaped.
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