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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How are switch ratings determined?

As the only functionality of a switch is to interrupt the flow of electricity, it acts like a small resistor right? Lets say that we have a switch that its max ratings are 3A/250V AC. So if we connect ...
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32650 LiFePO4 battery not charging

I have a problem charging my 32650 LiFePO4 battery. I have connected it to a 3.6 V power supply with a 1 A limit. I also connected my multimeter to check the amperage to my battery. When I start ...
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Would short 30AWG wires be a problem for 1A pull?

My knowledge in electrical engineering is extremely basic. I'm currently doing a project and I'm in the process of choosing the correct wire. My lack of experience is making it hard to know the limits....
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Can I use a connector at a higher amp if its lower voltage?

I'm making a PCB board where I'd like a barrel connector rated for 10 amps. I have been using part this part which is rated for 10 amps at 50V. https://www.digikey.com/en/products/detail/globtek-inc/...
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2 answers
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Capacitor in AC

I am new in this sphere and I would be appreciated to have some help. So I have this schema, and I don't understand what is the reason that the value of the capacitor amperage decreases after every ...
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Combined amps available

If I have 5 AA batteries powering a locking device, what would be the maximum combined available amps available? I know that 1 AA battery has 50mA but I do not know if I can just combine that value to ...
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How to figure out the current drawn by a 40kHz ultrasonic transducer?

I have some 40kHz ultrasonic transducers (the same type as which you find in the common Arduino ultrasonic distance sensors.) All information comparable to a datasheet I got was: I don't get how to ...
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Driving multiple strips of LEDs

This might be a very basic question but I am just starting out on my electrical engineering journey, and would like to check something. I have a simple LED design running at 12V, currently I have 12 ...
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5 answers
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If two devices both require 12V 2A power can I use a 12V 4A power supply to power them both?

The question title says it all really: I have two devices that both require a 12V 2A power supply, so I'm assuming that I can I just use a single 12V 4A power supply to power them both? I'm also ...
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Gasoline generator + Peltier configuration

I have a DIY cooler box with Peltier element 12V/3A/27 watts and want to connect via power supply to gasoline generator with output 600W at 5A max. Would that be a problem and not supply my Peltier ...
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Can high amperes damage servo motor? [duplicate]

I have 5 servo motor Futaba s3003 and DC Adapter 6V - 2A, I'm asking if I used this adapter on these servos will be okay or not? single servo stall current around 250mA not sure and 8mA/idle
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Best practices for soldering a larger wire to a smaller connector/terminal?

This is for a 24V 6.25A power supply. The power supply brick will feed into the connector then power a prototype device. What are the conventions or best practices to solder a wire to a much smaller ...
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Calculation of series circuit elements

I have a series circuit. Should it be true for this series circuit if I true to write like: ...
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1 answer
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How do I make sure the replacement switch for a device can handle the power demands?

My 10 year old (out of warranty which ends at 8 years) blender on off switch broke. The unit still runs great, I don't want to trash it. I just need to replace the switch. But I don't know what kind ...
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2 answers
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Current requirements

I have a device that the output power (watts) is controlled by a software setting. If the software setting is such that you only need to supply 20 amps to the device is that all you have to supply? ...
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Issues with getting UR

I'm trying to get UR5 from this schema, but something is not right. All I have so far
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Need help selecting correct irrigation pump start relay

Controller Manual says "Caution: To prevent timer damage, ensure the 24 VAC pump relay current draw does not exceed 0.30 Amps." But relay specs on the Internet, on product packages and in ...
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Using replacement charger with different output voltage/amperage specs

I am currently using a charger that outputs 15V @ 4.0A. I would like to know if I can use a charger that shows these output details in the back: 20.0V@3.25A / 15.0V@3.0A / 9.0V@2.0A / 5.0V@2.0A from ...
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Substituting a 10 Ah sealed lead battery for a 7 Ah one

Can I substitute a 12 V 10 Ah sealed lead acid battery for the 12 V 7 Ah one supplied with my Gallagher S100 solar energizer (for an electric fence)? Gallagher does not offer this kind of technical ...
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How to check ac current on ac adapter with dmm?

I tried by plugging the red cable into '10a' (measures current between some milliamps value to 10 amp, or so), and then putting black probe into the plug, then the red onto the jacket/outer part of ...
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1 answer
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I need help with putting together a battery

I want to make a 14V, 5A battery out of DIY crystal cells. Each cell is about 1.5V and 0.3A I know I can connect on series until I get my desired voltage, but I need to increase the amps. Is there a ...
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6 answers
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How to find what is eating up current in electronic circuit?

I have 2 exact electronic circuits, with one malfunctioning while the other is functioning. The total current consumed by the malfunctioning circuit is 0.48 A, while the functioning PCB has 0.271 A. ...
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Can I use 10A multimeter to test 445 watts solar panel

I want to know if I can use a cheap multimeter, model DT-830D, which has a maximum current rating of 10A to test voltage and amperage of a 445 watt solar panel with the following characteristics: <...
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LED dimming - eliminate EMI

Looking for some advice. I have a subsea light that operates at about 10-14v, but accepts up to 32vdc input(0-1.7A). My power supply is 24vdc 10A. Cable length 100 meter +. At max the lights draw 11 ...
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Does a voltage limit in a battery increase amperage over all? [closed]

I have an 18 V battery with a 4 Ah battery. If I limit the voltage output to 9 V with a buck converter or voltage regulator, how would limiting the voltage affect the amount of current output?
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What happens when you try to draw more amps than is available?

2 hypothetical situations: Situation 1: A 5-20R wall outlet is extended using an extension cord. The extension cord has a 5-20P plug, but only has a 5-15R outlet. Situation 2: A 5-15R wall outlet is ...
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What amperage should a 5 volt power pack be to safely use with a random 5v device to avoid the risk of burning out the device (i.e. an apple tablet) [duplicate]

I have a number of variable power packs one of which supplies the 5volts I need to for a particular device. The output is "500mA MAX". I worry that as happened once before with an ipad I ...
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1 answer
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Need help with potentiometer for DIY magnetic stirrer

I am looking to make a DIY magnetic stirrer for cleaning 3D printed resin models. In principle, the setup is not very complex; a motor, potentiometer, power supply. The problem is I am a novice when ...
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80% amperage rule for continuous loads?

I'm trying to understand how an electrical load affects a circuit. Let's say, for example, I have a setup that is on a 120 V, 15 A circuit: 120 V x 15 A = 1,800 W max if we have a continuous load (3+ ...
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1 answer
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5 V radio on 12 V battery [duplicate]

I am working on a powerbox project (12 V): charging a cell phone, lights, banana plugs and a small radio. 12 V is somewhat straightforward for me. The radio (https://rb.gy/e6ngmo) works with 3 V to 5 ...
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Safe Continuous Discharge Rate of a Car Battery

I have a car battery (Varta Silver Line of Products) that's rated at 110Ah, and 900A Cold Cranking Amps. The marketing of the battery from different sources says "huge reserve capacity" but ...
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Why is power specified in watts rather than amperes?

This probably has an obvious answer I'm missing, but searching the web only gave me information on how watts are defined, not why we use them. Many electric appliances (from things used to build ...
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How to increase the fan speed connected to a usb port

I have 6 PC fans 12V 0.12A connected in parallel. They are connected with a usb cable to a mobile charger. When I was connecting them to the motherboard they were much faster than now though the ...
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4 answers
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Why AM I getting 30 VAC @ 52 A?

Why am I getting 30 VAC @ 52 A? I have three identical transformers with a secondary, 20/10 VAC (8.8/17.6 A). I connected them is series to get 30 VAC across a heating band with a very low resistance (...
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1 vote
1 answer
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Current draw of a bilge motor [closed]

What happens at the coil when an electric bilge motor is stuck and stopped from spinning and the current draw increases beyond the rating (from 2 A to 8 A)?
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-1 votes
1 answer
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Resistance and energy cost in an AC circuit

I’m learning on my own about EE concepts. According to Ohm's law if voltage is constant then current and resistance will affect each other primarily. I believe most household AC circuits provide ...
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1 vote
1 answer
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Will upgrading my home electricity from 60A (120V) to 60A(240V) double my maximum available wattage? [closed]

My home appliances when turned on simultaneously runs at 3000 watt plus I am planning to move my gadgets from my office to my home (combination of multiple servers, multiple mac pcs and other gadget ) ...
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Battery - high capacity but low power

I recently saw an advertisement for a battery with 50,000mAh storage capacity, with an output of 5V and 10W power. Is this even possible? Shouldn't it be 250W power, or did I misunderstand things? I ...
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2 answers
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What would be suitable wiring for a 52V DC 30A 1000W e-bike?

So I bought a 12AWG RW90 wire from homedepot and I think it caused my anderson pp45 connector to blow. I'm looking at the wiring for my motor and battery, and they both look like 12 gauge wires. And I'...
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Energy consumption Calculation

I work for a food processing plant and working on a project that calculates energy consumption. Am having a hard time converting information given by the manufacture to calculate the average kWh. ...
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1 answer
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Photonicinduction - Less Turn Equals "Same Amps" but "Less Voltage"

I was recently watching a video by the youtuber ‘Photonicinduction’ and I came across this video. When the video was at 1:50, I noticed that there were 4 Turns on the primary and secondary so its a 1:...
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3 votes
5 answers
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Getting the energy consumption in joules over a period when having current and voltage

I'm trying to calculate the energy consumption over a period of 1.3 seconds in joules (J). I have a sample every 100 ms (0.1 second) with the current and voltage (in volts) (in practice, the samples ...
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1 answer
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SolarPanel Calcuation For Laptop

I am having some trouble understanding if I am doing my calculations correctly when trying to calculate the battery size / solar panel wattage for our RV. I started off small by just calculating for ...
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1 answer
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What happens when an electrical load is supplied to a motor via a switch and the motor doesn't turn?

I'm not from an electrical engineering background. But I'd like to understand what happens when I have the following: Electrical 'main power' switch ------> 'small switch' ------> electrical ...
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-2 votes
2 answers
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Why do battery makers advertise voltage?

I understand that voltage is an important factor for determining the amps of a battery. So why do battery makers advertise both the volts and amps of a battery? As a consumer, if I know the amps, why ...
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2 votes
4 answers
617 views

If voltage and current are inverse to each other, how do we get higher power?

I am dazzled; I'm young (teen) so am not too good, but I am wondering if current is proportional to voltage, how do we get high power? What I'm trying to say is that if we were to have a 5 V supply, ...
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Why would a multimeter give an unexpected current reading?

I assume that the multimeter should read 2A for a 2A power supply, why is it only 0.358A? Edit: After watching a video on the basics of using a multimeter, I realised that as well as short circuiting ...
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3k views

How many amperes can an alkaline AA battery supply?

I've seen a Duracell alkaline AA battery on Amazon. It can supply 1.5 V, but I don't see any information about the current (in A) or the power (in W). Where can I find this information?
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5 votes
5 answers
2k views

Why are high power LEDs categorized by wattage, not voltage & amperage?

In searching for the correct replacement LED for a project, I've noticed that, more often than not, high power LEDs seem to be primarily categorized by their wattage. Why is this the standard? It ...
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What fuses do I need?

I was trying to post a photo but it doesn't seem to like it I am repairing an electric fireplace, the fuse seems to be blown. It is a classic glass fuse with a long strand down the center. It says 25A ...
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