Questions tagged [amperage]

Amperage is the strength of an electric current in Amperes (Sometimes shortened to Amps).

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53 views

Bench Power Supply for ESC and KV on motor

I have a bench power supply it can provide ~10 amps and ~30 volts. Working on an autonomous car project I have an ESC to manage a brush-less motor. Two questions I cannot seem to wrap my head around: ...
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12VDC Fan rated at 0.08A only drawing 0.04A, can I increase current draw in order to bring the rpm up?

I've built a small desktop fume extractor for soldering. It uses a 120mm 1000RPM, 12V, 0.08A case fan. Not huge, but it does the job. The fan is only drawing roughly 0.04A and I have been fault ...
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1answer
44 views

How do I select diodes for battery charger repair?

I have an old vintage 1980's Sears battery charger that has two blown diodes. I wish to repair this charger and make it live again. I would like to know how to determine what value of diode should be ...
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Is there a way to take a battery power source at 7.1volts 15Amps and convert it to 5volts 4Amps? [closed]

I'm somewhat new to electrical engineering, I've been messing around with Raspberry Pi and I'm trying to use a 18650 battery pack (2 batteries) to power a Raspberry Pi (and some other things such as a ...
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1answer
39 views

Is electric voltage fade in and fade out?

Consider theres a LED through switch with power from DC power supply. It will on when switch is close and off when switch is open. From closed switch we open the switch, so the LED will turned off. ...
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Why does a slightly out of specs power supply works and what are the possible consequences? [closed]

I have the following lamp: Its power supply is rated at 5.6V and 2.68A blew up some time ago. I then went to an electronics shop where I've been suggested that I could replace it by a universal power ...
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52 views

How to overdrive a 5W IR LED for laser tag

I am a bit of a noob regarding electronics, but hey, I guess I need to start somewhere. Here is the premise: I want to build the Arduino Laser Tag Link: and all went fine until I stumbled upon ...
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1answer
73 views

Can I use an 12v 6Ah drill battery to power an 8amp pump?

https://www.screwfix.com/p/milwaukee-m12-b6-12v-6-0ah-li-ion-redlithium-battery/674FJ?tc=VB8 Is it safe/possible to convert this to be used with an electric circuit to power an 12V 8A water pump? They ...
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Powering hundreds of Adafruit's NeoPixels for a cosplay

My problem: I am trying to power a project with a 8x32px flexible matrix, 8x8px flexible matrix, 24px ring, 16px ring and 7px jewel (two of each), totalling up to a whopping 734 pixels. For my project ...
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72 views

Watt-hour vs Amp-hour - Battery life

This might sound silly but I am new to electronics and trying to understand the difference between watt-hour vs ampere-hour when it comes to battery life per charge. So let's consider this scenario. I ...
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What is the relationship between the length of a wire, its AWG, and its amperage rating?

The more amperage a given appliance or device draws on a circuit, the thicker the wire needs to be, correct? And this is to prevent the wire itself from becoming a heating element. I understand that a ...
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Raising Amperage

I am designing a DC circuit for my project and I have hit a brick wall that has got me stumped after hours of research. So far in this sheet of the schematic I have started to make a PDB like chain to ...
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2answers
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Microwave “power” vs “power consumption” [closed]

I'm looking at the specs for this microwave and it lists Power -> Microwave as 1,100 W, but then lower down it lists ...
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0answers
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Limiting output amperage on an arc furnace

we have built an electrical arc furnace from a couple of old arc welders. We are outputting around 200 A at 30 volts. However, sometimes it will decide to draw more amps than what our 400 A rectifier ...
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Incorrect amperage readings, possible faulty meter?

I have a very simple circuit: a 9V battery is connected to a 1500ohm resistor, which is connected in series to the multimeter and back to the battery. simulate this circuit – Schematic created ...
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1answer
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L6-30R with L5-20P Devices

My computer lab just got a power upgrade, now we have 208V/30A with L6-30 receptacles, in addition to what we previously had. I have some leftover rack mounted power distribution units (PDUs) given to ...
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Anti-spark for converter?

I have an ebike which I installed some cheap lights on just so it's legal for the time being. I have received the components to make a light that works off of the main battery. The issue I am having ...
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1answer
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Does a car battery (or any power supply) push amperes or does a load pull it?

I know that a car battery can provide 1000amperes for starting while other components only need a few amperes to work. I thought that loads "ask" the battery for some electricity and the ...
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2answers
68 views

When running two devices in parallel is the amperage always split exactly 50/50?

I have a AC to DC adaptor that outputs 12V 3A. This came with a USB HDD dock which has two slots. I want to splice a 12V fan into the wire in parallel so they are both powered by the same wall plug. ...
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What happens if a motor draws more amps than a battery can provide?

Lets say I have a motor which draws 25 amps and the battery I'm using can only provide 20 amps. I would assume this would cause a drop in voltage and poorer performance of the motor, but is this ...
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1answer
46 views

How to Increase Solar Charge Controller Output Amps

I am new to solar panel system set ups, and I'm trying to make an off-grid DC-DC solar panel system where in I will be running a bunch of 12v loads which are mainly DC Pumps cause its gonna be ...
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2answers
44 views

Motion sensor fogger

I am just wondering if there a way to attach a motion sensor rated for 2.5 amps to a fog machine that requires 4 amps? I’d like to replace the manual switch on the fogger with the motion sensor. At ...
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1answer
39 views

How to reduce current without affecting voltage for powering a fan? [duplicate]

So I have a 12 v 1 amp power supply. I want to convert the current from 1 amp to 0.08 amp and keep the voltage the same. This is for a power a brushless fan; specs 12 v 0.08 amp. I am not sure how to ...
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Does the UPS specifications make sense to you as far as battery current go?

I have following UPS: https://www.cyberpowersystems.com/product/ups/pfc-sinewave/cp1500pfclcd/ It has max power of 1000W It uses 12V battery at 12V it has to draw 83.33 amps in order to output ...
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3answers
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Calculating 12v Battery Ah

Forgive the ignorance here, electricity is a weak point of mine and I'm trying to wrap my head around it all. I'm trying to find out how many Ah exist in an old lead acid battery. I hooked up an ...
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1answer
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5 VOLTS 1 AMP TO 5 VOLTS 500 MILLIAMPS [duplicate]

I HERE'S MY ISSUE... THE CAR STEREO HAS A USB PORT OF 5 VOLTS 1 AMP, AND MY PROBLEM IS WHEN I CONNECT A USB MEMORY STICK IT "BLOWS" THE CIRCUITS (MAKES THE USB UNREADABLE), ITS MY SECOND USB ...
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Error showing the amperage in PSIM

I have uptadated my version of the program PSIM and I have noticed something. In a simple circuit, I used to click on show probe value during simulation to show the amperage in that point. With the ...
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2answers
90 views

Electric cart circuit, editied [duplicate]

I am trying to make an electric go-kart. I am new to the forum, so I may be missing some information but any help is greatly appreciated. After doing some math and discussing with friends I found the ...
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36 views

Does Ni-CD battery chemistry lose its discharge amperage over time?

I know with Li-Ion the amperage stays the same, right up until the end of its life, then the Amp Discharge rapidly goes down, But Does a Ni-Cd Battery Chemistry lose its discharge amperage over time? ...
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3answers
119 views

Can we possibly have too large wire to drop voltage over a long distance?

I had a argument with a friend about whether how can we possibly have too large wire gauge? Assumption 1. The voltage will never drop over a long distance (200 feet) because the wire is too large. No ...
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10answers
9k views

What causes a fuse to blow, the current or the power?

Fuses and circuit breakers are often specified at a certain current they will 'blow'. Increasing the current will also increase the power. So if a fuse is rated for 12V DC and 20 A, this would be ...
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1answer
87 views

Can i increase the amperage of a step up transformer?

I am doing wood burning, and I wanted to use higher voltage. I have a neon sign transformer-10000 volts- but it only has 3mA. It doesn't seem to be enough to push through the wood. Can I increase the ...
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3answers
123 views

Would a person receive a shock/risk death if they completed two ends of a neutral wire?

I know this seems like a silly question but I'm trying to make sure I understand the neutral wire. So I know if someone touched a neutral wire (assuming everything is wired 100% correctly) carrying ...
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1answer
70 views

Battery pack, voltage, and current load difficulties

Here is my scenario: I have 1 battery pack for each DC motor. Below are several problems that I am having particular difficulty trying to solve. DC motors: The DC motors are 9-12V DC working voltage, ...
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2answers
67 views

Battery Amp-Hours and C-rating (need clarification on formulas)

These formulas here are confusing me. I am not sure, exactly what some of the variables mean. What is the "Max. Amps" exactly, in this formula? What is the "discharge.C.value"? ...
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3answers
162 views

what is 1 volt and 1 ampere? May sounds very basic but its deep. please help

Facts: Charge, or more specific electric charge, on 1 electron is \$-1.6 \times 10^{-19}\$ Coulomb One has to do some work to get electron from its outer most orbit. It can be room temperature as ...
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78 views

How to calculate the average current

I have an ATX which the yellow wire is "+ 12 v ,18 amp" and "blue is -12v , 1 amp". When I use them together I got 24 v but I am confused how to calculate the max ampere. How to ...
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46 views

Avoiding battery charge interception with high-current devices

I could use some help to certify an assessment of an ongoing automotive issue. The vehicle is equipped with a high-performance electrical fan (40 amp draw/10 AWG), and I suspect that existing wiring ...
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3answers
88 views

How to find the right battery for my project

I am working on a project that requires 12v 12A of power. But I can't find the right battery. I have been looking at a few online tutorials about choosing batteries but they have not been very helpful....
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2answers
107 views

Is there anything glaringly wrong or bad with this circuit?

I'm changing out the pump for a pond and I am looking for an objective set of eyes to either confirm that my idea will work or to tell me it won't and why. I've attached a diagram to help explain ...
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2answers
51 views

How a little extra current can affect a motor

I want to run a 12V, 19 watts DC motor. Which should use 1.5amp of current. Now, I have a 12v DC, 2 amp power supply adapter. How it will affect the motor in the long term. Will it burn the motor for ...
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Where do I measure the Amp draw of my motor which is connected to a centrifugal fan?

I just started my job as an apprentice technician. For the longest time, my supervisor have always been measuring the amp draws of my motor from the outgoing cable from the motor to the electric panel ...
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1answer
46 views

AWGs for the following LED setup

I'm ass deep in my next project.....4 LED cubes(small lanterns) on the ceiling... The strip is: Power: 0.1-0.4W/LED 6W-24W/m Total: 30W-120W This is a variable value Have a 12V power with enough AMPS.....
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1answer
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My node mcu isnt turning on when connecting 3.3V to VIN [closed]

So I'm trying to wire my node MCU using in with 3.3V and in the multimeter, it's reading the 3.3V being delivered properly by the converter, I also tested for amperage and its consuming 37mA and I don'...
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2answers
150 views

Way to calculate the dangerousness level of volts+amps? (don't want to learn the hard way) [duplicate]

Is there a formula to calculate the dangerousness of amps, and volts? like watts, for example. Watts = Volts x Amps. Generally speaking, you could say wattage takes into account volts, and amps. I am ...
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169 views

12V 20A: What to do for high heat

I have 4 DC motors. they each require about 12V 9A DC (108W each), and have a potential draw of up to 12V 20A each (240W each) stall current. I am using 22 AWG insulated wire. The length of the wire, ...
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1answer
87 views

Can a 12V (automotive) relay carry more than 12v?

Everywhere I dig around the web (in forums etc.) I see people not recommending more than 12v to go on an automotive relay. Let's look at this one for example: I understand they have been designed for ...
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60 views

Fuse replacement

I’m trying to replace a fuse on my aerobic wastewater treatment system control box. The fuse has the following inscriptions embedded on one end. Also, it is a glass or clear fuse with metal ends. ...
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3answers
82 views

How to intentionally overload almost any value resistor with a DC power supply?

When attaching a resistor to my power supply (which is a Extech 80W 3-in-1 Switching DC Power Supply, capable of 36V 5A) and the amps are set to let’s say 5A at 16V the voltage stays the same but the ...
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2answers
91 views

Same mAh, same volt - different current

I need to replace the 18650 battery of one application. The battery doesn't have any marking about volts, mAh or amperes. Because it's 18650, the voltage is fixed - done. mAh - will use 2000mAh (let'...

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