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Questions tagged [amperage]

Amperage is the disfavored term for "current:": the strength of an electric current in Amperes (Sometimes shortened to Amps).

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Can you help me understand W=I*V - house load

So I'm trying to work out my daily Ah usage for an off-grid set up (and to see what my power bill at this new place might be like). Context: I've gone through and created a sheet with the appliances I ...
theYnot's user avatar
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-1 votes
2 answers
128 views

Why does a 230V 16A socket supply only the needed current to loads? [duplicate]

If I connect a 150W laptop charger to a socket that supplies at home 16A 230V, it will only draw the necessary amperage needed for the laptop charger at 230V. Why? Why doesn't my charger simply draws ...
John Mary's user avatar
-1 votes
2 answers
99 views

Which one will turn the ceiling fan faster? Current, voltage, or power? [duplicate]

Which one of these things will turn faster the ceiling fan? Is it the amount of electrons by unit of time passing through the engine, so is it current? Is it voltage, or is it the two that makes the ...
Moreless's user avatar
0 votes
2 answers
75 views

Is it possible to have high volts with low amps? [closed]

Can you guys give me some example situations where you would have 200-10000++ volts but less than 0.031 amps? Is it even possible? If not, why? Thanks. edit: I just realised, police tasers. But ...
llVIU's user avatar
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1 vote
1 answer
58 views

Trouble getting current form BLDC generator

I am designing a battery charger using a BLDC motor attached to stationary bike, I was giving this project hoping to fix the current output because is delivering low amps to the charger even at ...
Ivan's user avatar
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16 votes
4 answers
3k views

How can tiny MOSFETs be rated for relatively high current?

I'm looking at this MOSFET for example, the IRLS3034, which according to its datasheet, can handle a continuous current of 343A. The wire lead looks like it's about 1mm wide. It looks like it will ...
CaptainCodeman's user avatar
1 vote
1 answer
99 views

What is the most electricity that can be transmitted over a typical power line of the US electricity grid?

I am trying to understand how much electricity can be sent over the long-distance high voltage interconnects in the US (not sure if this is what is more relevant to me -- the context of the question ...
Jsevillamol's user avatar
0 votes
2 answers
63 views

Tools to measure amperage load on a curcuit in a finished setting [closed]

I work in disaster mitigation and when we enter a commercial building making sure we don't overload a circuit is very important to efficient equipment placement. I need a way to check finished outlets ...
Sunspear25's user avatar
0 votes
1 answer
51 views

WS2812 LED Pixel Ring 26 AWG JST

I am building a small kitchen for my child. For the hot plate I bought eight ws2812 led pixel rings: four with 8 leds and four with 16 leds. I soldered each two rings together so I have four double ...
Gregor's user avatar
  • 3
2 votes
5 answers
176 views

How can an AC adapter push 11A but only suck 2A?

I have a laptop adapter that takes in 120V AC and converts it to 20V DC. The adapter is rated for 230W (11.5A 20V.) Knowing conservation of energy and such, this means that the adapter takes in 120V ...
zapshe's user avatar
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1 answer
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Current regulator for 12 V DC system

I'm looking into using a Noco NLP30 battery for a car I'm building. As far a specs go the battery should be fine for starting and maintaining accessories. However, the battery can only handle 24 amps ...
Eli's user avatar
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0 votes
2 answers
96 views

Ammeter Shunt Change

I’m attempting to retrofit an external shunt style ammeter into the charge circuit in my car but am far from an electrical engineer, so I figured this would be the best place to ask. The ammeter I’m ...
Charger512's user avatar
0 votes
1 answer
44 views

Victron Charge Controller with Amperage limit

I'm looking into charge controllers that have features to limit the charge rate of a battery. I've got a small battery bank, and only want to charge at say 10Amps max. It looks like many of the ...
2b77bee6-5445-4c77-b1eb-4df3e5's user avatar
0 votes
1 answer
40 views

Step-up power supply for motor [closed]

I know very little about electricity. I am a private detective. I am converting on older surveillance periscope to modern IP cameras. The periscope has several motors that raise/lower turn 360% and ...
Steve J's user avatar
0 votes
2 answers
153 views

How to figure out mAh battery needed for cheap string lights for x amount of time? [closed]

First, not only is it a question for a specific use case, I would like to either be pointed in the direction of a resource to learn, or a short explanation to help learn. I ordered a set of string &...
jobiin's user avatar
  • 101
3 votes
4 answers
2k views

Max amps and voltage CAT5e

I have CAT 5e running throughout a house. Trying to use the wiring to connect a CCTV camera. The camera says it uses 500 mA and needs a 12 V adapter. I do not know if it needs a full 12 V to run. I ...
Lefty's user avatar
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1 answer
93 views

Is this PSU safe for this Christmas light string

I have an orphan 50 LED Static light string with label stating:- "Complete supply chain 3V, 1.5W, IP44" which has no power supply. I also have a power supply which is also orphaned i.e. it ...
six-h's user avatar
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0 votes
2 answers
49 views

Fans with presumably same cooling performance but significantly different current

I am looking to replace a fan in laptop. I got two candidates for a replacement. Both of them have the same Lenovo FRU number (Field Replacement Unit). From what I understand items with the same FRU ...
Andy's user avatar
  • 105
-2 votes
1 answer
83 views

Effect of limiting current of a lithium cell [closed]

I was curious as to what happens to the remaining amperage after the value needed has been dissipated from a battery. If I want 1 ampere from my battery at 4.2 volts and my battery is able to supply ...
imran muhd's user avatar
0 votes
1 answer
42 views

Would this Omron G5V-1 DC3 be suitable, even at my battery's 4v2 fully charged voltage?

I'm in a state of deep confusion and would appreciate some guidance. Please no sarcastic answers, I genuinely don't know! I've included links to the components in question at the end. So I'm designing ...
nohatsatthetable's user avatar
0 votes
0 answers
40 views

Replacing lipo battery with a power supply

For a project i'd like to power a brushless motor that works with esc and lipos but i need to replace the lipos with a power supply so the motor can run longer, i need 50v and need to be able to pull ...
mat gof's user avatar
0 votes
2 answers
64 views

Learning about DC voltage [closed]

I have a step up booster that increases my 36 V battery to 50.1 V. If I plug it into my 48 V battery which charges to 54 V it still reads 54 V on the multimeter. I'm wondering why. Could it be ...
Christopher Mahoney's user avatar
0 votes
3 answers
255 views

Q point and dc biasing

For a proper dc current gain, how do i choose a proper q point without getting the transistor into saturation or cutoff using voltage divider bias technique?
imran muhd's user avatar
0 votes
3 answers
365 views

DC current gain of transistor

I'm having a little thought about how DC current gain comes about. If Ic = Beta x Ib, does that mean the current flowing through collector to emitter and the current from the base i.e beta x Ib is ...
Ruqayya Saleh's user avatar
1 vote
2 answers
130 views

How to measure inrush current over 3 minutes

I have a DC electronic system that takes approx. three minutes to boot up, and I have to decide what gauge wire to make power cables. During boot up, this system powers on several different sub-...
mikey B's user avatar
  • 11
3 votes
3 answers
171 views

Bypassing battery to power car while camping [closed]

I'm considering going camping but I only have a car, not an RV. The campground has a 50 amp socket for RVs. In order to have power insider the car for air conditioning, charging phones and laptops, I ...
user84207's user avatar
  • 133
3 votes
3 answers
684 views

How do you specify the requirements for 3-phase load center (breaker box)

I have listed the eight required circuits in the image/table below. There are three 3-phase 208 V circuits, and five single-phase 120 V circuits. What I'm looking for specifically is how many amps ...
Brice Edward Furr's user avatar
0 votes
2 answers
537 views

Step up boost converter to increase amps keep voltage

I have a 48v 13ah lithium battery on 1800w motor with a 33 amp controller can I use DC to DC constant current boost converter to increase my amps to 30ah but keep my voltage the same? Or increase my ...
Daniel Brister's user avatar
1 vote
1 answer
127 views

What phase transformer is this? How do I calculate the FLA for this kind of transformer?

I am trying to calculate the Full Load Amperage for this 150 kVA Transformer so that I can appropriately size the fuses for it. The transformer is being supplied by two connections to a 3 phase system....
Jackdiamond's user avatar
1 vote
1 answer
137 views

Transistor pin configuration

Is the base of a transistor (NPN) always positive or does it change due to manufacturers specs; as some might decide to put the base as pin 1 , followed by the rest; maybe collector as pin 2 etc like ...
imran muhd's user avatar
0 votes
4 answers
135 views

Measuring Inverting Op Amp config and not getting desired output (practice)

I am a year 2 EE student and I'm still struggling with getting simulations to work in practice. Components: 10k resistor x2 Arduino LM741 Op Amp (pinout: https://www.ti.com/lit/ds/symlink/lm741.pdf) ...
NonComposMentis's user avatar
-1 votes
1 answer
62 views

Can I add a 20A breaker to this electrical panel [closed]

I replaced the oven at my small condo (600 sqft). Oven is 2300 watts/ 9.5 A. It needs a 20A breaker. The panel has a few empty slots. Question: What's the best way to confirm that the panel can handle ...
SamuraiJack's user avatar
0 votes
2 answers
674 views

How are CCA's (Cold Cranking Amps) measured, specifically with regard to the load resistance?

I'm not interested in the "cold" part of CCA's. Here is my understanding: The electrical system draws (by far) the most power during the actual start-up of the engine. The idea (more or ...
Toasty's user avatar
  • 81
0 votes
1 answer
122 views

Wondering how to power this motor (universal motor?) with the correct power supply and using a pwm speed controller

This is a motor that I had lying around and so I did a bit of research and found that it’s most likely a universal motor. As shown, the motor says 120v and 60hz (which I assume is the AC and DC rating?...
Ntl's user avatar
  • 1
0 votes
1 answer
72 views

Shunt + hall: any advantages from combining those two?

Are there any devices that combine shunt resistor and Hall effect to measure the current with better precision? Or, do I understand correctly that shunt is better in all aspects except of the heat ...
hans's user avatar
  • 165
0 votes
1 answer
95 views

Peltier not consuming enough current

I have two water loops, one to dissipate heat and one that cools water. Both are closed loops. I have four 12706 Peltier modules connected to a switching power supply that can deliver 12 V and 30 A. I’...
acanessa's user avatar
1 vote
1 answer
58 views

40 amp device on 50 amp circut [closed]

I have 220 VAC 26amp dust collector that I need to run off a generator for my mobile business. The manufacture of the dust collector says to put it on a 40 amp circuit. When I hook the dust collector ...
Travis Pettry's user avatar
2 votes
1 answer
450 views

How to directly wire a solar panel through the wall socket without a battery? [closed]

I apologize for this the multi-ponged line of questions. I am thinking, I can wire the solar panel to a pure sine wave inverter then use a extension cord with 2 male plugs, one going to the inverter ...
Justintimeforfun's user avatar
2 votes
2 answers
227 views

If I were to run a motor slower, would the battery drain less?

This might be a dumb question, but I'm using a 48 V, 18 Ah battery to run a 48 V, 1800 W brushless motor. I calculated a predicted 34.6 min runtime at full throttle, however, I need it to be able to ...
Tachanks's user avatar
0 votes
2 answers
78 views

Ampere boosting circuit

I'm trying to solve a problem in a device where I don't have much room for a stronger power supply, but I have room for some small circuit board "to fly in the air". I need a circuit that ...
Ivijan Stefan Stipić's user avatar
0 votes
1 answer
50 views

Power supply amperage to wattage conversion [closed]

How many amperes would be needed for a PC power supply to run around 1000 watts RMS on a class-D mono block car amplifier in my house? Are PC power supplies the best option?
josh hoyt's user avatar
0 votes
1 answer
304 views

How much time the load would take to drop 1 volt of source battery?

I am trying to figure out how much time a load takes to drop 1 V of the power source. I have a load (vehicle tracker) of 12 V 0.1 A (as per the datasheet) and a car ...
Awais Saeed's user avatar
0 votes
2 answers
240 views

How can some multimeters automatically detect and measure the AC and DC voltage and current?

I was wondering how there are multimeters that are able to measure voltage and current AC or DC automatically without setting the reading on AC or DC.
Shamooooot's user avatar
3 votes
1 answer
3k views

Can I use a power bank of 5 V/3 A to power an Orange Pi 5?

I'm trying to build a portable PC with the Orange Pi 5 16GB RAM model with a touch screen and powered by a solar power bank. I saw that the Orange Pi 5 requires 5 V/4 A to be powered, but I can't find ...
Thiago2104's user avatar
0 votes
1 answer
129 views

Solar panel output volts and amperes are higher than the battery but it won't power a small DC motor [closed]

Why won't my DC solar panel power a small DC motor when the output volts and amperes are higher than the battery that does power it? Thankyou everyone..Alot to review Regards
Matthew Nisbett's user avatar
0 votes
3 answers
2k views

Would a 20A, 12v fuse be functionally identical to a 1A, 240v fuse?

1Ax240V=240W 20Ax12V=240W Assuming both fuses are of the same type, would they be interchangeable? I'm aware that 240v fuses may not exist. I'm assessing the viability of substituting a 250v fuse with ...
Sebastian Hahn's user avatar
0 votes
1 answer
984 views

Can I convert a 36 volt battery to a 48 volt battery or how do I extend a 48 volt 10 amp hours to 48 volt 20 amp hours? [closed]

How do I convert a 48 volt 10 amp hours to 48 volt 20 amp hours battery? Can I convert a 36 volt battery to a 48 volt battery?
Brian B 's user avatar
1 vote
2 answers
739 views

12 V, 18 Ah battery for a solar panel

I have a 100 W solar panel. I bought a 12 V, 18 Ah battery with a 30 A PWM solar controller. How can I get this to charge right? The current will be too much for the battery. How can I cut down the ...
William Miller's user avatar
0 votes
0 answers
49 views

Electrical Project containing parts with different volts/amps rating

So I have a small project just for fun. Includes a Peltier module , and a small cooling fan like the ones used in a pc for airflow. So my question is since the peltier module have a different rating ...
AnnoyingGarlic's user avatar
0 votes
1 answer
70 views

Powering long LED strip

I am currently working on an Arduino project and I want the Arduino to control a 5-meter long LED strip, which (as the producer said) needs 18 A and 5 V. My chosen cable is this one. I heard a lot of ...
Rubinschwein47's user avatar

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