It also says use only the T-T006 DC power adapter. its 12V 1.5A positive polarity. 5-10 Minutes? a close enough output will work, but of However, Id go with the 90 Watt supply, since it is more power than the original could possibly supply; kinda like switching from your normal boat-towing car to a pickup truck. most likely nothing would have happenedunless the polarity was wrong. Inverter Wattage for 12V (120W) cigaraette lighter socket This link also gives a general guide (like original thread here). Trying to figure out what 15 VDC and 100 mega amps means. My dell laptop charger has same terminal (+,-) to machine. Is there any difference if the polarized a circle or diamond. These two passages seem to me to contradict each other: #1: The following might not cause damage, but the device will not work properly: The rating on the power cord is just a max voltage rating because in other countries they may have power rated at 250V. Alright, a 120W 12V radiator fan draws 10 amps when operating at 100% output. (Youve probably also heard about resistance (), but this doesnt usually show up on power adapters.). You need to look at the OUTPUT the input does not matter as long as it was bought in the same country. Hi Kelly. The adapter the wont work is labeled like this 12VAC 840mA and this adapter light sup the device but doesnt actually give me any power and i dont understand why. I have a record player that I bought in the US. And resistance relates to the size of the pipe. So, while the connection into the adapter is the same on several power cords, when I closely examine the plug going into the AC outlet, each cord has different specs on the actual plug. (10 PM To 8 AM), When Should I Turn Off A Dehumidifier? To produce larger amounts of electric power (wattage), we usually need quite a lot of amps. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. I can only use these sweepers as I have mobility issues where I cant drag a hoover around with me. Thanks to all of you, best wishes. amperage listed on this Adapter. Imagine, instead, you hitch the trailer to the tractor of an 18-wheeler tractor-trailer. So to correct something in this information. So your original power supply could produce up to 70 watts of power. Output: 5V up to 15V = 2.2A. Thanks again. Could someone decifer this for me? The power outlet info starts on page 330 of the PDF (part 6-9 of the manual) and the fuse info is on page 505 of the PDF (12-10 of the manual). I mistakenly plugged in what I thought was the right cord (my masking tape marking was no longer on it), but didnt think to check the power cords adapter output (24 VAC 1.5A 36VA) with the keyboards required input (DC in 10-12 volts) before plugging in. You need to do the calculations as given to determine the cable sizes required. This just further complicates consumer understanding! I am having trouble understanding how to determine the quantity and raitings of Aluminum Clad resistors I would need in order to bring a 1212 1/8 aluminum plate up to a temperature of around 100-120 C. Also how to wire them. For AC power supply, watts are equal to the power factor What gauge of wire would I need to connect the water pump to the battery? Thanks to all the xperts that very concisely explain Amp draw from devices that should be less than the Max Amp stated on Power Adapter label. Output: 20VDC, 2.25A = 45 Watts. Spectacular job on this post. Current (A or mA) of the adapter should not be lower than the current of the device but may be higher. My tablet power adapter wires broke. More info needed. So I wonder if because I was using a different output voltage that it could be the reason why it wasnt working? While a motherboard may only call for a paltry 50W (in combined 3.3v, 5v and 12v rails); you would be more than safe to use a 1500W high performance power supply as only 50W will be drawn from the powersupply itself. Which is the positive? Under the Polarity Section you said: If there is a sign on the right, then it has negative polarity:, This is not necessarily true. Brilliant article, which I too read too late to save an effects pedal for my guitar. Thank you for this site and forgive my ignorance in this matter. Thanks! Have you tried a UPS and one with power conditioning. Its the 5a 75w that has me thinking it needs not just the plug, but a fat box with the two cords hanging from it too, thoughts, suggestions pls, aa grateful disabled veteran, I got an AMH A399U monitor with a Korean plug and power AC 100-240V 5a 75w. The back and side of the radio clearly say, Power Source: 7.5V 400mA AC/DC Adapter The charger was hot when I disconnected it. What happens? -DC Output: 19.5V 11.8A 230W. Quick question: Am I supposed to match the specs from the power adapter to my laptop battery or the laptop itself? It requires a 4.2v and 600 mA charger. Will this work? Yes (inverter efficiency - 90%) Output load: 120 watts (10 amps @ 12v) Now let's put this info into our 2nd formula. That means we need a wire size with an ampacity of 15.63A or higher. But what I am also going to assume is that the adapter is giving the 1 amp input rating just to let me know that the AC plug power cord going from the wall into the adapter must bring in at least 1.0 amp. I didnt realise the difference between AC/DC, so used an old one my sister had for a laptop and the power button goes on, but nothing comes on screen. Really glad the article helped you get back up and running! What does '12V 120W MAX' mean on a car charger? current will be 1.5 amps. If you multiply the voltage by the current, you get the wattage. Or best to step up/ step down like I do with my others that are stated as 110v AC? What kind of adaptor would I use for this monitor to work in the US? This was the best simple summary of the article I could have imagined. 250A is quite a lot; AWG wires cant handle that, you will need MCM or kcmil wires. I got my first whiff of blue smoke and I could no longer listen to my tapes to practice for drum lessons. I was going to splice the two tother but the old charger had an out put of 12v 1.5a and the new one is 12v and 3a. I know it takes an AD-5 adapter. = 5W I felt heat suddenly on my device, so I removed it from the power source. Adapter plug looks like a stereo headphone jack and I dont know which part is negative/positive. On this machine near electric connection point, DC 6V is written. Can I assume that any AD-5 adapter will have the correct voltage, amperage and polarity for that keyboard? Required fields are marked *. If your appliance says input: DC 12v/1A, get an adapter that says Output: 12v/1A DC. For my shaving Mashien Thanks for the reply. There are many brands and only noting APC as they are globally well known. If the charger shipped with your tablet, thats what you want to use. Its a craig 3piece shelf clock radio stereo. The speaker one, potato one and motor one are probably the easiest to do at home. Because the speaker out put was low I thought perhaps the keyboards volume fader was on the way out. Very reasonable. Same can be true for the reverse of course it all depends on which way the C is facing. this process rapeat again and again fed of from this could u plz help me. does that mean i should look for a plug that is 12dc with .1amp. This then drew my attention to the power supply Voila the possible solution may have been found! I can match color and design. In the videos/blogs that I have seen it shows the battery number as A31N319 and it is rated at 11.25 volts, yet I can see on the power adapter supplied with my laptop that it is rated at 19 Volts output, so, my question is, wouldnt this cause an issue with the battery receiving 8 volts too much??? Google around for more info. Stack Exchange network consists of 182 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. That means amps, not watts. If you assume that the device has no indication whatsoever of input voltage, current, or polarity, how is it possible to find an adapter which will make it work without trial and error which could also be called trial and fryer? That 1.2A is the max amp that can be drawn from your adapter. Thanks for your blog. We might have to use 14 AWG wire (20A), 12 AWG wire (25A), or even 10 AWG wire (35A). I got a portable DVD player from Goodwill online and it didnt include an adaptor so I guess Ill have to buy one. V = 8.7 volts, To calculate the value of parallel resistors: I have a Brother P-Touch PT-2300 label maker. Any ideas??? This makes more sense than all the electronic matchmaking. If I buy a usb-to-dc 5v cable and connect the powerbank to a laptop with specs like this: Today however, there are also bronze, silver, gold, platinum power supplies which guarantee a certain amount (minimum of 80%) of . This includes polarity. what if at least one, or both device and adapter dont mention the polarities? Of course, it would be a test instrument and not an adapter per se. Now if I can find a plug that will work in the EU that has the same output would it then work without me burning down my house? I had Fujitsu Ah531 series laptop that uses 20v 3.25a output. Will I have problems? It does not however generate the power so just because you have a 19v 4.74a 90w adaptor, it can never generate the 29 volts. Note: As a general rule, if you are in doubt about the 12V wire size, go for a thicker wire. watts divided by voltage gives you amps. OUTPUT: 20V. What these outlooks dont take into account is the various protections and versatility of adapters and devices. So, the wrong adapter did not actually ruin my device, but the wrong adapter itself is now dead. Most inverters produced with the intent of plugging them into an existing cigarette lighter circuit are rated low enough not to approach the limit so you don't blow a fuse. Hi, i have 12v high torque gearbox reduction motor 15rpm. You also dont have to worry about polarity with USB. Some manufacturers put a lot of information on the label. Im still if sure if the polarity drawing on the adapter is what the adapter does or what the device its plugged into should do. Look at the brick part of the adapter for the word OUTPUT. The AC/DC part should be fine as most laptop charges handle both (it will indicate it on the power supply). Article has a contradiction. Some adapters just have a designation like 20W or 16W on the Input line, one has 300mA on the input line. Copyright 2007-2021 groovyPost LLC | All Rights Reserved. It is a computer charger. It should work fine if the Universal adaptor has the correct connectors/pins that match your phone. (See formula below.) Im confused by the parts dealing with current, though. I bought a 12 volt electro-thermal cooler which came with a 120 volt ac adapter showing output of 13 volts. The short version: Voltage (V) should always be the same for both adapter and device. I think before we can make any kind of definitive statement it would be good to see the schematic for the circuit. Two 10 awg wires (black + red) are preinstalled, but I will follow your recommendation and use a 4 AWG to avoid issues. And yes, its just fine to keep it plugged in 247. (Excellent article, btw I tip my hat to you, Mr. Busch. The universal power supply has circuitry to adjust the voltage to the needed level and the maximum current would also change such that the product is 90W. Can you help? Accounting for NEC 80% rule, you need a wire with an ampacity of 9.375A. @ Julia, yep its that simple and if youre in a situation where you need to test power output, grab yourself a meter. Wild part is I had two different flashlights like that but different styles/brands and I just mixed up the cords but that was different enough to be a problem. 10A to watts calculation with voltage of 12V DC. But so far is working fine. The original has: INPUT: AC100-240V-,50-60Hz, 1.5A. How much overpower or under power would this be for the keyboard, as regards to the rated imput? Is there any advantage to a longer term CD that has a lower interest rate than a shorter term CD. Im willing to bet that any given household has a dozen or more different types of cell phone chargers, AC/DC adapters, power bricks, power cables, and charger plugs. If there are only two resistors you can use: Rp=(R1*R2)/(R1+R2) Institute of Industrial and Systems Engineers My issue is well everyone in my family, phones shorting out but I dont think its from a power supply being to hi. Power adapters numbers are just averages and never exact so I dont recommend it but if its your only option and it works then you have no choice as long as you can live with the risk. watts = amps volts. Thanks in advance ;). I have a lot of extra 12v adapters,if you know the tip size and polarity, I could send you one for about $10. its a 12volt DC 100ma. The stock adapter is a 6V 120-240V input with a 800mAh output. Ensure your device is rated to the same voltage and to equal or below the max. Im going to try these universal adapters and see if that works. Effectively matching like for like. What Causes High Or Low Subcooling? Cheers. What a fantastic thread you guys. In turn your adapter will overheat and potentially burn out. The power adapter I am about to buy says, 7.5V 2A for 400mA 500mA 800mA 1000mA DC Adapter Power Supply 5.5mm2.1mm/2.5mm. Yes, thank you. Terms of Use | It says 12v 5a. Imagine you want to tow a speedboat. I dont have time to read through 256 comments so I dont know if this has been addressed yet but you are absolutely wrong about the input of the device.. if it plugs into the wall, then your input is 120 volts ac and the box youre plugging into the wall is a transformer thats transforming 120 volts down to save 5 volts 2.1 amp for instance but the input and the output do not ever match if youre plugging it into your wall outlet it will always be 120 volts ac and output to whatever your devices the box you plug into the wall is a transformer. The correct wire size for a 150W 12V circuit is the 16 AWG with 17A ampacity. my old AC Adapter specs: I got a lot of ideas that are very helpful in dealing with my power adapter problems. It would work Ive done that many times. Reading around this subject I am not sure it is quite as simple as match volts, amps at least as much as required. )- So is this an output values?? Input specifications do not indicate polarity any clues on where I can go to look this up? Another factor that could lead to derating the outlet is the desire to allow "headroom" for short term peak loads like motor starting and the current inrush that happens with power supplies. In short, you need a 250 kcmil copper or 300 kcmil aluminum wires. Would a 12V DC adapter work? It ended up being a pretty big box. Sometimes the information is printed on a label that is worn & torn. It was a fancy flashlight that you use to work on cars or really light up the night in an emergency, the kind with 5 different modes and all that. But this adapter stopped working (may be it was in use for 3 years). I have a small motor vibrating motor for a table . I plugged in my daughters charger to my old sweeper by accident and fried the circuits in my old sweeper, so I bought one from Ebay, only to find the stupid woman had put in a charger that doesnt belong to the carpet sweeper. Power Supply (from my monitors manual) Those Apple parts get tricky as the iPad cable and USB plug are 2A and the iPhone cable and plug are 1A. Yup! Does Hz stand for Watts? Someone help me.. What are some installation best practices of a higher-wattage, pure-sine inverter to connect to pre-April, 2016 Model S Tesla? Edit: if one wire has ribs or flat edge all the way down the wire(2 conductor) and other conductor insul is just round, the non-round will be gnd. RapidTables.com | That is why the PS2 power supply says 100- 240V because it can turn AC power between those voltages into the power appropriate for the PS2. Standard USB devices have a 5 V dc voltage and a current up to .5 A or 500 mA for charging only. if using adaper 15V,0.5Am,7.5W instead of the original adapter 15V,0.36Am,5.4W is it wrong. I have a photo but dont know how to attach it. So, super simplified, if the polarity picture is the exact same on both the adapter and the device, are they compatible? The numbers you are reading are for the battery itself and only concern replacing the battery. Hey, I plugged a AC 5.5v 2.5A power adapter into a DC 5V charged device, and now its not working, did I do something bad to it? The real solution would have been for the manufacturer to provide a charger with the unit in the original packaging. Watts (W) is the product of Volts (V) and Amps (A). I have always been pretty anal about making sure the voltage, mA and all that. (yes I know these are pretty cheap and I could just buy another hub, but Im tired of throwing things away!!!) wattage our device needs, we have only one choice (according to the electric power equation): The circuit will increase the amps by itself when it detects the voltage drop. Volts = should always be identical. I need to connect a 12V 90Amp deep cycle battery to a 62lb trolling motor with a 58amp max draw for a 10ft distance. Kind of like the Water Tap controls the water (The Volts) and the hose determines how much water can actualyy pass (Amps). Thank You, Nico. The little drawing shows the + sign on the right. i have recently moved to Canada from australia and received a game console from australia i pluged the console in and it turned on completely normally but when i turned the tv on the image began to slowly flicker and scroll down the screen repetitively is this caused by the difference in voltage between the two countries or is it a fault with the console. Backing up your data to the cloud via an automated service is critical. I paid about $80.00 for this thing about 7 years ago and as far as I know, they are no longer being made so I would prefer not to fry it if possible. Dennis. Hello Yogesh, the rating wire is connected with ampacity. What's the meaning (qualifications) of "machine" in GPL's "machine-readable source code"? The USB also is the symbolized for 5V voltage. Its not whether the position of the + or is on the left or right that determines the polarity but what sign is attached to the solid circle. The sweeper sticker states that it is 7.2VDC-12w Lucky there wasnt a full on fire and I was home to catch it before it got out of control. another rating you might see on a 300 milliamperes device is .3A. -AC Input: 100 ~ 240V 50 ~ 60Hz I never had to measured the the size of the connectors post, (on the male end), but Im glad this artificial brought up the issue. Perhaps a review will address this if it existed! Best use or borrow a 3amp or higher adapter ensuring that is of course 12volts. The Amp rating on the plug just denotes what it is capable of, eample: one wouldnt use the same cord for a heater that is used on say a table lamp. The only standards that electronics (usually) conform to are in regards to the wire gauge and respective maximum current. The fuse in the fuse box is for protection against shorts in the wiring to the inverter or a catastrophic malfunction of the inverter, not to prevent you from plugging excessive loads into the inverter. be approximately equal to 0.8: For AC power supply, watts are equal to the power factor times amps Ive since ordered a correct voltage ac cord with 12V4A, so I hope it actually works. Ive seen references to EE type using a multimeter/voltmeter (which I dont have) to check polarity. Some sites that explain about UPS and Conditioning. If its stated 5V, you are not in trouble , because you can use the USB cable to charge your phone by the powerbanks port. How can I control how many amps from the wall socket go into the adapter? Of course, polarity would be a factor that youd still be taking a chance on, but many modern electronic devices have built-in polarity safeguards which are much less likely to fry because of reversed polarity than because of over-voltage. To not get the size of the 12V cable wrong, you can use two key resources further on: You can use both of these tools to adequately size a 12V wire. Ampacity (150W) = 12.5A 1.25 = 15.63A. (fan only, not temperature regulation). The wiring within the cord for the heater would be thicker and capable of more throughput than the lamps. Polarity (plus on the left side or plus on the right side) should always be the same for both adapter and device. Battery:6Cells 4700 mAh 50 Whrs Ive lost the wall wart for a computer network device that requires 9V DC 600mA but my friend has the exact same device. The battery is a 1200mAh Ni-cad. Thats just the 101 of how current works and we have NEC code to prevent this. Or, look for a diagram showing the polarity. Then, I will get the information with a multi-meter mapped-out the the wires and the plug. Well said. There is a positive pole (+) and a negative pole (-). I have an emergency flashlight but I do NOT have the adapter to charge the sealed lead rechargeable battery, it is old and is some unknown brand. @MikeM times volts. The most important details for you and your delicate electronics are the voltage and the current. The key is to match the DC output of the adapter to the DC input of your device. If so can i get a plug that can be 12 volts DC 5 amp im thinking if im at 100ma which is smaller then max 5 amp i should be ok, I cant see how to set up a new comment. Not one of them is under 1.0 amp. If the adapter says Input: 100 240 V (standard USA AC input voltage) and 50/60 Hz, then its the standard cycle rate of the power. The bottom line is that nothing in the circuit should fail before the fuse. With a little skill, you could swap the wires around. If it pulls out, read the fine print before plugging it back in. But i did decide to give it a try because when i opened the plastic box of the Creative AC Adaptor, i found that it had only a stepdown transformer inside and i concluded that the AC TO DC Converter circuit had to be located inside the Woofer box to which the AC 11.5V 1600mA was to be fed. Its easy to get them separated from the phone or laptop or tablet, or router. That also means that a 14 AWG wire will not be enough. My finds reveal only 5V USB power supplies. To understand what these three terms mean, it helps to think of electricity as water flowing through a pipe. Core i7-8565U 1.8GHz 16GB 512GB laptop. Without seeing a schematic for the circuit serving the accessory outlet it's hard to say if the rating is based on an abundance of caution or other loads on the same circuit, or maybe even a bureaucratic limitation. Matt, I am looking for a 12-volt adapter amongst the hoard that I have. THANK YOU for this article!!!! But the little polarity tip doesnt lock in place. Originally had the booster plugged into the wall outlet, but am having the same problem plugged into the ups. they would have a combined ampacity of 70A and could carry 56 amps; that would be closer to what you actually need. wattage of the device you want to run with a 12V battery, and you will get the minimum ampacity the circuit wire should have: You can use our example for a 150W 12V device. Amps however may be an issue and comes down to your Notebook and its requirements. Also: seperate to this, ensure the polarity is also correct. How one can establish that the Earth is round? If not, looks like itll be a new TV for me. Thank you. You must have deep pockets. I think probably every cord that would work as far as the proper connector would carry at least 1.0 amp. And once that happens, it can be complicated to figure out which goes with which. Be careful and gentle with your plugs like you are with your wimmin and they will do you fine through the years. It just takes time and frustrating failure to finally identify what youre looking for, you got it. GDPR: Can a city request deletion of all personal data that uses a certain domain for logins? Since the radio requires 400mA (0.4A) it should be perfectly safe to use for the radio as the adapter says so itself at the stated 400mA on the label. so if this is all that is on the power adapter, is it center plus or center minus? Thanks for writing for the non-techies out here! You're over-thinking this. As the article states, you do want to match voltages between the power supply and device, but you can us a power supply with more amps than needed. But next week I have a device coming that also has a US 2 pin plug but is rated much lower than a set of hair straighteners, rated at 5v/2a. You dont mention watts in the mix. (Im technologically challenged, and a senior citizen, so please forgive my ignorance, and please speak simply.) You could buy the 65 watt adapter and *probably* be fine it produces nearly as much power as the original, and your device probably doesnt draw its maximum current most of the time. Thanks. Great information!! I lost my PS2 Super-Slim power cable, and I want to play the PS2, but I have one for my PS3.