Can i use a power supply with lower amps. It asks for a dc14v + 4.

Can i use a power supply with lower amps Clearly you not have enough power to run both devices, nor even enough to run the 5 V device at its maximum rated current draw. Jul 29, 2012 · Higher current (A) is okay because the device won’t use as much, but higher voltage (V) is going to “fry” it. 5 amps. If your phone tries to pull much more than that it will excessively load the power supply. 5a rating, and its power supply died so I'm using a 12v 1. You can charge your battery, at normal speed or slower. Is there some kind of AC variable power supply that I can use to run a power tool at lower amps? I have a 120V 1000W angle grinder. - It is a quality PSU, with at least an 80plus Bronze rating. 50 to 65 watts are common. If anything, the laptop just won't power on. voltage regulators). Jun 7, 2019 · The original power supply label shows output 8Vac 250 mA. Mar 23, 2005 · There are times, especially when playing outdoor, when there is no AC power available. Automotive circuits are a great example. So, if you’re using your car to power something like a refrigerator or freezer Feb 28, 2017 · It is not a good idea to use a lower than recommended power supply. First, current mismatch is not as dangerous as a voltage mismatch because internal power supply in the laptop is sensitive to overvoltage, but when external adapter could not provide current neccessary for laptop's operation it will just turn off and drain battery instead as if adapter was unplugged. You are now in position to understand that 12 V x 3 A = 36 Watts. 48A adapter while the new one uses a 19V and 3. 1 Amps is equivalent to 100 milliAmps and 0. Think of amps as the width of the hose, and volts as the speed that the water is flowing at. No harm Dec 18, 2024 · No, you cannot safely replace a higher amp battery with a lower amp battery. We can either teach you the fundamentals of electricity, or you can accept that the laptop power supply is not adequate to power your soldering station, and get the correct power supply; 24V and at . Your car battery can run an LED at a few miliamps, and also many amps for the starter. Water hoses often make a good analogy for electricity. And those electrons want to equalize. I assume the second laptop's power supply can not be used on the first, because it can't supply enough power to the laptop. Higher voltage is often used to send large amounts of power over long distances specifically because the current is lower and there is lower loss through the transmission system (for example in the public power utility grid). \$\endgroup\$ – The OEM charger may be generic/over-spec'ed, and it's designed for max load and to power and charge concurrently. 9 amp motor, the power supply will be overloaded and its voltage may drop, it may just shut down, or it may blow a fuse. Amps can vary up indefinitely, as the device will only pull what it needs, and can slightly vary down (say, 11A) and still be fine (as the stock charger is rated for the maximum power draw and some safety room). For this cookbook, we will start with a powered USB hub but work toward low-power and low-profile solutions. The 'extra' power supply is 19. 5 A for the Pi's power supply, in case you don't want to use a powered USB hub. That's a unique case. Does the replacement fan need to be the exact same amperage or can it be higher or lower? I know that you need to match volts/amps pretty closely with laptop fans but I’m wondering if amps would matter that much with the NAS as long as it’s a 12v fan. I see people using Molicel P42A 21700 cells or Samsung 40T cells that can output 30 to 40 amps in short bursts, and they can easily charge at 2 amps to 4 amps, which is 0. There are cases when you run your laptop at a power consumption of <90w. 2a power supply. Lets say you have a 500mA load and you attempt to use the 250mA adapter, then you will either overheat the 250mA adapter, or in the worst case, the transformer core in the adapter will saturate, cause large pulses of current to be drawn during the peaks of the mains cycle. 7 at 240V (since it's an auto switching adapter). The listing states that it is in fact compatible with my model of monitor. Apr 1, 2013 · There are quite a few tube amps that use SMPS (one of the sponsor vendor Siliconray actually had one for sale, don't know if he still does or not). Your component will malfunction if given lower voltage. Overheating and Damage Risk: Lower amperage can lead to overheating in both the battery and the device. So what do \$\begingroup\$ The fact that the supply can deliver 5V/60A does not mean it will nor that it has to. 4167 ohm resistor (which would draw 12A at 5V, or 28. It is a ds7700/98 and the specs say input is 100 to 240 v and 1. 3 amp output. If replacing the power supply direct from the manufacturer is too expensive, try an electronics shop like RadioShack. 5 a. Make sure your connector and insulation is rated at the engine temperature plus 30 degrees or so, and if it is, you can easily run 4 amps continuous on Input amperage is going to be higher to account for Power Factor when converting from AC to DC. 1 router died - its output was 10V, 1000mA. 1666 amps. You may have a 5000W power supply, it doesn’t mean your PC will draw that much current. 1 for our minimum + ~20% for safety) then it should operate without tripping the breaker. The current required by the PC will determine the amperage requirements of the power supply. It is critical to match power supply specifications with the safety and optimal performance needs of the device. Apr 11, 2022 · Is it OK to use low amps? Yes you can use low amps if you want to it will charge the phone However, this doesn’t mean that it’s a good idea to do so. Jun 3, 2021 · ⚜️ Chargers and power supplies come with different Voltage and Amperage ratings. In practical terms, that means the amperage rating of a power supply or charger must match or exceed that required by the device it is connected to. The water pressure would be the voltage. However, it is ok to have a voltage power supply rated for more current than the components rated value because the component will draw as much as it needs. 15A receptacles can be used on a 20A circuit as long as there is more than one receptacle on the circuit, and a duplex receptacle counts as two. Watts would be the power (volts x amps) the water could provide (think back to the old days when water was used to power mills) Dec 5, 2018 · Tip polarity can usually be seen as a symbol like this: In this picture, it indicates that the tip is negative. To stay safe, always assume you cannot. Since the time is the same for both the input side and the output side, the time cancels out and you can say that power in has to be greater than the power out. I don't know if it is there to protect the charg Shortly: the battery should not have been damaged at all. Using a laptop power adapter with incorrect voltage or current values can potentially damage your laptop. Aug 13, 2021 · Is it OK to use a power supply with more amps? 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. The device will only draw as much current (Amps) as it needs at the time. Can I use a charger with higher amperage than the original? Aug 22, 2022 · If you supply lower current through the adapter than the device rating, you could damage the adapter and power cord. For example, 0. Just because a charger has an 8-amp rating doesn’t mean it will transmit 8 amps. Depends on load, of course, don't recall what load percentage is assumed for the amp rating. You can even use a weaker power charger for emergency charging (like a basic 19. The amperage rating on your power supply simply means that the supply can put out up to 2 amps, so as long as the voltage matches (12 volts) you could safely use a higher amp power supply for your device. Do a search on the forum and you will see a few examples, I built a small guitar amp using an off-the-shelf 12VDC, 5A SMPS, which powers the filaments and a small DC-DC converter (so 12VDC-300VDC). device wants 2 amps, power supply can only handle 1), you're pretty likely to fry the power supply (and during its death throes it may take your device with it). Jun 14, 2012 · Just because a power supply is rated (ie. For example, if a unlabeled device was powered from a 9 V and 1 A supply, you can replace it with a 9 V and 1 or more amp supply. – ⚛️ The voltage and polarity of the power supply must match. Original was 19. In many cases the power will be more stable when you use a higher amp power supply because you are not straining it as much as when it is running at its maximum value. I wouldn't use anything under 24 amps here. 5 Amps normally, but can jump to 9 Amps during high load. Sep 8, 2017 · According to this fellow, Voltage must match between monitor and power supply, and Amperage on the power supply can be higher than is required. By understanding your devices’ amperage requirements and following safe practices, you can prevent these issues and ensure your electronics operate smoothly and last longer. So, a power supply rated to 12 V x 3 A is expected to be able to deliver 3 A at 12 Volts and can deliver a lower current. But, using a power supply with a lower amp rating than your laptop requires can cause problems. If your router only uses 1 amp at 12v then the new power adaptor is capable of providing more than enough power at the right voltage to meet the requirements of the router. 5 amp laptop charger I could use for cool projects. 5V, 3. If it is over the maximum rating for the power supply, you are probably overloading power supply (efficiency of power supply makes this inexact). I know what you're trying to say here, but it's not exactly correct. I have a power supply with the unit label showing output AC 6V 300mA. Some take 0. 14A PSU work, or would I run into any issues. When a device demands more current than the battery can supply, it can cause heat buildup. Ultimately, you can try it, at your own risk. 5A by themselves with nothing plugged in. Voltage would not change the max amp rating of the power supply, it changes total power that can be safely delivered. Sep 3, 2017 · i have an old style philips bluetooth speaker ipad ipod doc but lost the charger. I would say with your given specs, no - you won't fry the laptop. 5) than the laptop can work. Conversely, lower voltage is unlikely to cause damage since the device simply won’t have enough power, but lower current can cause trouble because the power supply cannot provide enough. Adapter is a provider, it's rating is the max it can safely deliver. The Raspberry Pi documentation allows up to 2. I have an old router with a 12v 1. This exact same bike comes with a slightly weaker battery thats cheaper and the only Oct 18, 2020 · In the ratings given there's an inverse correlation between the current and power so it seems conceivable that it can handle more current at a lower power, but that doesn't seem specific enough provide the power handling at a given amperage or to communicate the absolute limits for voltage/current/power. So, if the power supply can somehow deliver 15. 5V, 1000mA) and so far it works. If the voltage is less, the device will not work, actual damage is less likely. So yes, lowering the voltage with the buck converter will allow you to pull additional current from the supply, the supply will pull enough current to match the power dissipation of the converter and load. Higher amps on the adapter is OK, higher volts is not. The current rating (amp) listed on the power adapter tells you what the power adapter is capable of supplying. Amps is the "Volume" and voltage is the "Pressure". Oct 9, 2019 · Voltage is pushed to the device from the power supply, so an excessive voltage can easily damage the device. 1 volts, make a strange noise, go bang and/or catch fire. Like @Tonny said, you're well within tolerance in either direction. Calculate the power required:-12 V x 1 A = 12 W. My AC power supply voltage is 25% lower than the design input to the charging circuit. Dec 10, 2019 · The current capacity of the power supply is what it is capable of supplying if asked. Do not use a power supply with a lower current rating or power rating than the original. And maybe the 500mA power supply can handle a bit more, anyway. This is bad and you never want it to happen The ability of a class D amp to output power is directly related to it's supply voltage as it can only regulate downward. The card says I need a 600W PSU and 42A on the 12V rail. \$\endgroup\$ – Yes the DC converter can limit the amp power in 2 ways: The amp tries to draw more current than the converter can supply and the voltage will collapse. I have an old Samsung c23a550u. But if you can't find the same, then choosing the right one is important. 6 amp output. A Computer power supply is one of the best to use as like you mentioned-- it has a very very stable 12/5volt supply. The volts should always match between the power supply / charger and the device. The adapter you're So your power adapter can supply 12v at up to 1. Jan 28, 2016 · No, you can't. Be sure your power supply or battery can meet that requirement! In terms of power, they are frequently equivalent. Depending on the resistance (assuming the voltage stays the same) you get a high flow of electrons ( low resistance = High amps) or a low flow of electrons (high resistance = low amps) May 21, 2020 · For example, in the above example, if the 48 V device requires 2 A (or nearly 100 watts), a 12 V input will need to supply at least four times the current, or 12 V 8 A. If the power supply stored energy (like a battery backup system,) then the time on the input and the output aren't the same anymore and you have Apr 14, 2012 · The output on the first laptop's power supply is 15. I've tried using a replacement adapter (7. Because the speakers will May 9, 2020 · The current does not matter the device will only pull what it needs. In rare instances you can substitute one for the other. Similar question to here: Laptop power supplies, does current matter? According to the answer, using a lower rated power supply/adapter could cause several problem such as melted power supply/cord In reality, it probably has somewhat higher impedance than that, so the current is a little lower, giving the power supply a little bit of head room--typical engineering rule of thumb would be to leave at least a 10% margin, so it's probably intended to draw no more than around 1. What About Using Charger With Lower Amperage? Low amperage is more dangerous than low voltage. 75 W. You could have a power supply that is capable of supplying 20A, but will only deliver the amount of Amps that the PC draws. I have another power supply from another wireless:router that is 5V/3A. I am not clear as to how that impacts the output of the charging circuit and its ability to How many amps does a power supply take? I’ve sourced a power supply that takes 240 AC mains supply and provides 5v @ 8 Amps. It's also going to be the max Amp draw to get the required power, so you'd likely only see it at the 100V range of input and it'd probably max out at 0. If an under-powered charger still gets hot, assume it's inadequate. 5 amp power supply for the 0. A higher amp battery can provide more power when needed. This is why high amperage is not a problem. Oct 7, 2022 · Look on the bottom of the Chromebook or its docs and this will tell you what power to use. e. 42A adapter. Now if the breaker for that outlet is above 5 (4. Voltage is pushed to the device by the power supply, so must match. For those times it would be nice to have a battery powered amp, or a DC to AC converter you can connect to a 12 volt battery. Your mileage may vary. The worst thing that's likely to happen is the power supply could let the smoke out. If you are replacing a previous power supply and don't know the device's requirements, then consider that power supply's rating to be the device's requirements. Current (power) is NOT pushed. If the power source has more than the required current, it should work quite nicely, It won't stress either the power source or the device being powered. Certainly if the load is shared between two pins you should not have a problem. If you overload a power supply, then it will overheat and break, and highly likely be a fire hazard. A: you can only charge it at lower watts. A low cranking amps battery is more likely to be damaged if there is a sudden surge in power draw, such as when you start your car. If you supply higher current through the adapter than the device rating, the device will not work properly. However, it the original power supply is 9 volts, don't try to use a lesser power supply without confirming the voltage and amperage needed by every component AND whether any of those components are not getting power directly from the power supply input, but instead drawing power through another componet Dec 15, 2023 · Lowering the voltage can be achieved by using a power supply with a lower voltage rating, while increasing the resistance can be done by adding resistors or other components to the circuit. In terms of safety, the only issues is that of current flow is enough to cause a significant overtemperature in the connections/wires that could cause a fire. And amperage is lower on the substitute supply, which is on the safe side. There are cases when you need >90w for your tasks. For example, a laptop charger with a 3 Amp rating can send a maximum current of 3 Amperes. Mar 29, 2023 · Also there is a sense to have complete analog linear power supply (without digital controllers) with analog pointer voltmeter/ampermeter and good filtering for use with ultra low noise devices, bipolar output is preferred for such device, because it is often used with circuit that needs bipolar power supply for op-amps. It is important to note that changing the amperage in a circuit can have significant impacts on its overall performance and safety. I have a MIDI keyboard with a 9V 500mA rating and I have a 9V 200mA power supply and one with a 9V 1A rating. The restriction to flow (resistance) determines how much flow (amps) you get from a given supply voltage. Jun 13, 2015 · It is not ok to supply more current to a component than its rated value. A device determines how much power is drawn. Assuming that the monitor has a switch mode power supply internally (good assumption because the monitor would have to somehow get rid 14 Watts of heat with a 12 Vdc input), a power supply input of 12 Vdc should also have to supply about 10 Watts. The 10A sticker is what the power supply is rated for at 110v AND 240v. I bought an Ebike and it has a 48V 16AH battery. So the device will only use say 1amp even if it is hooked to a 100amp power supply. Jan 29, 2016 · Not completely. You can run one single LED at 0. It it safe to Dec 1, 2010 · The load will draw current according to the voltage you supply to it. You MUST use a suitable power supply with the SAME voltage Sep 18, 2024 · The current rating of a charger is the maximum current that it can supply to the Laptop. Which is important in electronics like hard drives/motherboards/ram etc. As long as the voltage is correct and the power supply can supply enough power for whatever device youre plugging in, then you should be good to go. Voltage is how hard the power source is pushing energy. With these guiding points in mind A lower amp battery will work, but it won’t last as long. And most AV receivers have undersized, thermally compromised power supplies. Too powerful for my 15amp house circuit (I need to plug other things simultaneously that together with the angle grinder at 1000W would overload the circuit) and light usage. In summary, using a power supply with lower amps than required is generally not advisable. Using a power supply with less current than required may result in insufficient power, resulting in malfunction or damage. Total power required:-12 W + 18. So you have a system that takes 6. I want to weigh that risk against the costs of having to replace my toy :) Thanks in advance! Only using a power supply with the manufacturer's recommended current rating or higher will allow you to reliable run the computer without draining the battery though, as only then the power supply will be able to keep up with the computer running under full load. Here’s why: Voltage. If the supply can't supply 6A, then it will either get destroyed, or lower it's voltage until the voltage and current can "match" (the lower the voltage, the less current the poltier module consumes). The device will only draw as Feb 9, 2024 · When selecting power supplies: Match the voltage exactly. If the power supply voltage is significantly more, it will damage your device and could start a fire. Your laptop will function normally. Often times the router maker just grabs some cheap mass produced power supply that is good enough and maybe the cheapest one was 1A. If the laptop requires 19V you should use an power-supply that provides the same voltage. If you use a power supply with a lower amps rating, it may not be able to provide the current that the PC requires. You didn't say the wattage of both of the power adapters or the specs of your Mini PC. If the power supply has no internal protection, it will likely overheat, and may be damaged by that heating. The motor is a consumer, it's 50A rating is how much it will EAT, not how much it can take. The current is dependent on what the load "asks" for, not what the power supply can deliver. 40 amps. Apr 20, 2013 · Your power supply does not determine how much current your PC draws. In your case, the original adapter was rated at 2 amps, which tells me that the router may draw up to 2 amps, otherwise they wouldn't have provided a 2 amp adapter. Nov 10, 2024 · Using the Wrong Laptop Power Adapter: Risks and Consequences. Only voltage must be the same. The quality of amplifiers' power supplies varies wildly. If you supply lower voltage than the device rating, it will probably not work properly. You can use a power supply with a higher amp rating than your laptop requires. Transformers require being wound with larger conductors, and transformerless power supplies can be very unsafe (at any power level) If you want lots of amps for projects at home, a good quality bench top power supply can give you a decent handful of amps. Feb 10, 2023 · \$\begingroup\$ if at 5V the peltier consumes 6A, then as long as the supply can provide at least 6A, it will consume 6A (even if the supply could supply far more). 10A x 110v = 1,100 watts 10A at 240v = 2,400 watts Oct 25, 2017 · There is absolutely no problem for running 3-4 amps through a 28 AWG ribbon cable conductor with low duty cycle. You cant on your laptop if lower voltage supplied. Take pictures of your laptop on fire if it doesn't work out, and let us know. However there are always larger systemic conditions and constraints. Dec 28, 2016 · Hey guys, I just realized yesterday that I need to order a replacement fan for a NAS. It just sounds like a low output battery that is not at all meant for this application. However, it can also deliver a current less than that as well. Continue using your new adapter. 5 a and 50/60 htz as well as output 10 v and 3. Nov 7, 2020 · Calculate the power available:-12 V x 1 A = 12 W. With a lower capacity charger, charge the battery while powered off before using it to operate plugged in, and minimize accessories that are powered from the ports. i. 5v with 4. A larger power adapter may provide faster charging and that will be useful. 16 * 4 = 64, so that sounds right, but I assume the volts and amps should match up properly – Colen Commented Sep 5, 2009 at 18:07 A switch-mode power supply needs larger components to handle higher current. Sep 15, 2020 · One milliAmp is equivalent is one thousandth of an Amp. It asks for a dc14v + 4. It is now just a matter of finding a listing online that is convenient for you. The only caution is that under full load the laptop will want more amps than the adapter can provide. Feb 11, 2024 · Can I use a high amp power supply for my laptop? The answer is, it depends. However, my PSU only has 550W and maximum 38A on the twelve volt rail. Apr 20, 2019 · The amperage rating on your power supply simply means that the supply can put out up to 2 amps, so as long as the voltage matches (12 volts) you could safely use a higher amp power supply for your device. Jan 8, 2017 · Lower voltage will result longer time to charge the battery and it not blow up your components. Is this situation stable, or shou May 19, 2015 · Amperage is what the laptop "pulls" from the AC adapter. No. If the wall plug for the clock says it is a 5V power supply the pack will work since there is likely added circuitry around the power plug to get it down to the same voltage as the batteries. That said 170W to 65W is a power factor of just Having 240v power means the absolute minimum current the PC would draw is 4. This means the power supply is designed to produce 12V constantly, up to a maximum of 5A. I'm just getting into electronics and found an old 19v, 3. 5A and 2A at 5v. This is different to voltage, where excess voltage can indeed damage a circuit that doesn't have sufficient protection (eg. thanks! The power supply cannot deliver the voltage and current that the soldering station requires. g. Calculate the wattage. If you have a low resistance circuit, you can have high amps at low voltage. 5 V x 3 A / 0. Until you specify the specs of the computer and power adapters, you won't know. In this case, you will start draining your battery for the power consumption. You can use the biggest power supply in the world to run a single led diode with no issue. 2 amps. 8 Amps is less than 9 Amps. The original fan is 12v, 0. 8A at 12V) it may (depending on the quality) turn itself off, output only 0. This will place an excess load on the power supply. Nov 14, 2012 · My Dell D510 is OK with another Dell power supply. 08 amps. 25A, common 65W charger), as long as you stick A device will only pull as much power as it needs from a PSU(like a computer psu, its not always running at full load). Nov 5, 2022 · Here’s everything about using a lower or higher wattage charger for your laptop: Using a lower wattage charger might seem safe, but it can actually cause problems with your power supply. Mixing tip polarities is just as likely to fry your router as using too high a voltage. However, it can be safe under certain conditions: - The current on the 12V rail is more than what the GPU and CPU combined require. What is the risk of using a lower amperage power supply. Is it safe to use the older, higher amp adapter on the newer, lower amp monitor or no? Dec 20, 2023 · Bottom line: it’s a bad idea to use a lower current rating adapter since it could cause excess heat. 2 - 10% = 1. There is, however, a surge protector (or whatever its called, I don't know terms yet) keeping it from running current continuously. 6 V at 5 A. 5A to 12v 2A? Jun 21, 2014 · Well you should NOT be using that power adapter. Adding much more power will NOT supply more "zoom" to the computer. A battery’s amp rating indicates its ability to deliver current. The no-load measured output is AC 7V. I heard that Volts can fluctuate a bit but Amps:have to be dead on (or below). If I don't have the exact amperage, should I use higher or lower? It also allows for you to plug in an AC adapter, but it does not come with the power adapter. Whether this is good for the power supply depends on its design. The power adapter might be insufficent and your computer might shut off under heavy load and the power adapter could heat up a lot. As long as the voltage provided can operate your laptop, then it is fine to use even though given lower voltage supply. 5c to 1c. I' Replacing a monitor and the old one uses a 19V and 9. For example, if your phone came with a charger that has an output of five volts and one amp, you can use a charger that has an output of five volts and 0. A higher amp battery can handle a greater surge without being damaged. Add up the rated max power supply current draw on every device you have installed on the power supply. I was under the impression that, from an abundant supply of amps, a device will draw only the amps it needs. Amps and watts have some flexibility. Using a power supply with lower amps can lead to performance issues, overheating, and potential damage. You can also use a higher wattage charger for your laptop, but it has to meet other specs like voltage and polarity. It requests a 12V 1. Raspi) will take. You can use a power supply with a higher rating on current (amps) or total power (current * voltage, so directly related anyway). Using a higher wattage power supplyYou can safely use a powe Jul 16, 2011 · You can also use the 5volt line if your LED's are of lower voltage inputs. The difference is that 20A receptacles have a T-shaped neutral slot to accommodate a 20A plug. You are using a laptop power supply which will be a sophisticated switch mode supply with current limiting. , you can use a 3 Amp power GoForSmoke November 11, 2011, 5:18pm 4 Jan 8, 2014 · Hi there, this is a little off topic from the heavy computer talk but I have a question that is really important to me. 5 AMP power adapter and the closest I have is a 12V 1 AMP power supply. Amps would be the volume of water flowing through the pipe. Have fun Nov 15, 2024 · According to a study by the National Renewable Energy Laboratory, inadequate current supply can lead to erratic behavior or failure to power on. An undersized, thermally compromised power supply puts a very real, concrete ceiling on how loud the amp can drive a given set of speakers and remain stable and dynamic-sounding. ::Will this power supply work with my router or do I have to go out and:buy a new one? Thanks!::Regan Not exactly correct. Can you use a 12v 1. Since, I'm only supplying a single data point. Before I can offer any real suggestions can you answer the following questions what voltage is the wiring running your outdoor light that you want to use to power these additional lights? what is the max rated output (Watts, mA, Amps) of the transformer running your existing outdoor lights What you should do is get a 240v/220v one, get that voltage circuit installed so now you use much lower amps, or get a high gauge/amp circuit installed and get high power breakers Reply reply Measure the current on the AC input to power supply using an AC amp meter. The load (in your case the LED strips) determines the current, not the supply. Using a battery with lower amps can lead to inadequate power supply for your device. The short answer is yes, it could be dangerous - but probably only to the power supply, not your equipment. Using an adapter that is rated lower (1. According to wikipedia the resistance of a 18 gauge wire is 21m Ohm per meter The Sony power supply says 16 volts, 4 amps; the dell one only says 65 watts. If the voltage is too low, you'll get either nothing, or odd / failure behavior when the power draw on the system gets high. At moderate levels of overload the result is likely only the voltage "sagging". 0 A. If the power supply for the clock says it is a 4. So excess amperage capability by the power supply is a good thing, not a problem. but you can us a power supply with more amps than needed. May 23, 2012 · You can use a power supply with a higher rating on current (amps) or total power (current * voltage, so directly related anyway). It can lead to poor device performance, safety hazards, and potential equipment damage. If you connected it to a 0. The internal construction of 15A and 20A receptacles is identical, with both rated for 20A. A car battery needs a lot of amps at ~12v, and most USB outlets are rated between . The shorter the piece of wire the smaller the resistance (and voltage drop). 5V power supply 5V may not be with in the standard plus or minus 10% for electronics. Too High: Supplying a higher voltage than your laptop requires can overload its circuits and cause irreparable damage to components. The output on the second laptop's power supply is 15. 6 V at 8. It’s a Rosewill Performance RP550-2. Can I Use a Power Supply Unit with Lower Amps? This depends on the power requirements of the device. Essentially voltage is a difference in Electrons between two points. You can also Jun 29, 2019 · That is ok because when using PSUs with a higher amp rating the monitor only draws the amount of current it needs. 4 volts, then the current will be 4. A power supply can provide a set amount of power. Just make sure the voltage matches. Computers (and all like DC devices) draw current. Reply reply Apr 16, 2015 · \$\begingroup\$ From reading the specs provided above, it appears as if the monitor wants somewhat less than 10 Watts of power. Jun 5, 2023 · No, amps do not have to match, but the power supply or charger must be able to supply enough amps as required by the device being powered or charged. capable of) a higher current does not mean that this is what the 'sink' (ie. The resistance and the power dissipated as heat are related and calculated by the power equation \$ P= I^2 \times R \$ where P is the power, I the current and R the resistance . The 12v battery can provide hundreds of amps for a short period. The voltage SHOULD match (power adapters provide a steady voltage over a range of currents), whereas the current MUST meet or exceed. 5 a charger on a 12v 2A device? Re: Can i change external HDD’s power adapter 12v 1. Higher voltage can definitely cause damage. Battery powered amps seem to always have very low wattage output, with small speakers and don't sound very good. Would a 14v 2. Advanced Concepts Mar 24, 2019 · The power adapter for my Linksys WRT54GL v1. Jul 27, 2019 · So I’ve started building a Pc from used, last gen parts, and I was wondering if my power supply could run my GTX 770. Amperage is pulled by the device from the power supply. The adapter attempts to supply a constant voltage, the connected device will draw whatever current that it r May 27, 2013 · A power supply (what you're calling the "charger") rated for 1A can only provide up to 1A and still operate within spec. 0A power supply. The number of Amps supplied by a power supply is essentially irrelevant when compared to the Amps flowing within an LED strip. Jan 30, 2020 · You can, sometimes, use a power supply with lesser amperage, with the approach above. However, the laptop adapter's voltage is a full volt above the specified 18 V; this will cause more current to flow into your device, since the voltage has been increased. 01 Amps is 10 milliAmps. With DC DC switching converters, power in = power out - heat losses due to the efficiency. Feb 14, 2010 · If the power source hasn't the ability to supply the current required, the power supply output Voltage will drop, the power supply may well overheat and burn out. May 19, 2019 · Hello. 001 mA from that supply if you want. Your cpu, gpu, number of hdds, and so on determine the amount of current drawn. If the device tries to pull more amps than the charger / adapter can supply (e. A charger’s amp rating shows you the maximum amount of power it can transmit. Car batteries run in the hundreds of amps at 12v. So, a motor that can barely turn will take a lot more amps than a motor just spinning. Current is pulled from the supply by the device, so the device only draws the current that it requires, regardless of the maximum current the power supply is able to supply. Can I use a power supply with lower amps? Can you substitute direct current for DC AC? Direct current doesn’t. 5v with 3. Clearly the voltages are the same, but the currents are different. Can I Use A Lower Wattage Charger For My Laptop? 4 Answers. Jan 8, 2008 · :supply for it. It will not output other voltages. \$\begingroup\$ If you use the 0. Always ensure that the power supply matches the amperage requirements of your devices to maintain efficiency and safety. The capacity of your power supply just means that it can supply that much power in case it is needed. The RPI can see up to 1 Amp draw, or higher. 75 W = 30. It came with a 48V 5A fast charger. If we think of electricity as water flowing through a pipe it can help us understand amps, volts and watts. Here's the deal. I wouldn't use it. If the laptop is rated as 1. A 5A device will use that 8A charger to pull Jan 9, 2021 · Energy is the product of power and time. Any device will only draw as much current as it needs, so long as its power source can supply it. Same battery, same voltage, different current. Nov 11, 2011 · Regulated DC power supplies provide a constant voltage output when used at or below their rated current. 6 amps, that is the max it will pull from the adapter under its heaviest load. 75 amps without any problem. 8 (estimated converter efficiency) = 18. hckenh vkrleho daae zrpxp kfybx moculwx wqasml ozvlg pkcmy emdo cdcx lgvprvp itpdv zttrc aiqzvj