Questions tagged [amperage]

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

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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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43 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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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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66 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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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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The correct fuse for this computer PSU?

Dear all, There are alot of different ratings on this Dell D460AM-02 PSU, however even though my best understanding is that it would require a 8 amp fuse. I do not want to go over its correct rating ...
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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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Help with welder connector [migrated]

Hi I recently purchased a chicago electric 170A MIG welder. It runs on 240V and it draws 20A (single phase) but it has a 50a plug on it (nema 6-50). My dryer outlet is a four prong 240v 30a outlet (...
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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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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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200 A service upgrade [migrated]

I want to install central air conditioning in my home but my current service is 100 A, I Believe. If I were to upgrade to the 200 A service, could the breakers be configured where I have 2 100 A main ...
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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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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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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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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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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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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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How do I pick a suitable battery for my sensor?

I'm very new to electronics, and I have a sensor which is being powered by 2 batteries in series, each 6V/3.5Ah. I believe this means the total Watt Hours is 6x3.5x2 = 42Wh. When the sensor started, ...
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105 views

Reduce 32 amps generator output to 10 amps

First you need to please understand that I am a truck driver, I lift heavy things and have a smaller brain pan than you good readers. Aka; not an intellectual that understands elictrickery. While on ...
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How does a 5,000 watt hub motor differ from a 4,000 watt hub motor (Both BLDCs), when powered by a 72V 100Ah Lithium ion battery?

I'm trying to design a motorcycle conversion kit for an underprivileged population in a rural area. I'm currently looking at potential hub motors to be powered by my selected battery (as mentioned in ...
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69 views

Increase amps with set voltage?

If I had a battery that is 50ah at 30V, what would I have to do to increase the current rating to 150ah, while maintaining the same voltage?
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Understanding relation between energy use, watts and amps

I'm looking into air conditioners and I've been unable to fully understand the relation between watts, amps and the energy ratings (in this case, the one used in the United States, the yellow Energy ...
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58 views

Power supply and equipment that I should have to fit all small electronic projects [closed]

In the last 2 months I have been wasting money in power supplies, I have been learning a lot and spending a lot of hours every day with robots and electronics so I upgraded my motors and my projects ...
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54 views

Maximum amps over 24 AWG CAT5 wires [duplicate]

I have a project that runs on 5V and should draw a maximum of around 500 mA. There is an existing CAT5 cable running conveniently to this project. I'm considering powering the project by using two of ...
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31 views

Checking amps with manual-ranging meter: Jack/dial consistency required?

Multimeter: UNI-T 89XD manual ranging I received a comment or two that said I will not get an accurate amp reading if I use the 20 amp jack and set the dial to anything other than the 20 amp setting,...
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Learning from checking a 9-volt battery the wrong way with a multitester

I'm doing some extra-curricular learning about electronics before I know much. In the spirit of Platt's book, "Make: Electronics", I am "breaking and burning" things to help learn the fun way. I'm a ...
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1answer
83 views

Why more voltage after full rectification

I used 105j 400 V capacitor. Connected it to 230 V AC. Then I measured voltage after capacitor and it was reduced to 116 V AC. Then I checked voltage after 4 diode rectification, here measured 204 V ...
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41 views

Downsizing wire for harness

I'm making a harness for a fan assembly. The wire gauge for the rig is 18awg but the fan assembly connector uses 22awg which means I need to adjust the wire size at some point between the two ...
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1answer
86 views

How do I deal with the high amps in this Arduino circuit?

I am a programmer by trade and I like to mess around with Arduinos from time to time. I recently purchased a BUNCH of 12V 5W DC water pumps (the 3x5 models shown here). I am currently evaluating how ...
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43 views

Changing amperage without changing voltage

I know this has been covered before but I don't see an answer for what I want to do. Using a 12 volt car battery I want to power up a wound coil to produce a magnetic field. I would like to have a ...
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37 views

Odd problem with PSU [closed]

I don't know a much about electronics so please if you choose to help, layman terms would be appreciated. I have an old 550w PC PSU. I have used it previously with an electronic air pump to pump up ...
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1answer
88 views

Dual OP AMP setup circuit supposed to pull 2mA, but where is the other 4mA going?

This circuit uses half of the TI dual OPA2626 (not showing the other half of the OP AMP). This dual OP AMP supposed to use 2mA, but it's pulling around 6.8mA (measured at the Grnd pin and also at the ...
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1answer
40 views

Jump starting a motorcycle behind a fuse? (slow blow atc fuse?)

I have a motorcycle with an SAE 12v 10ga lead for charging that I'd also like to occasionally jump-start the motorcycle with, I need about 90amps for about 1 second, which is fine for the 10ga wire, ...
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55 views

Power consumption in watt for fluorescent lamps

I live in Egypt where the AC voltage is 220v. Yesterday i bought two fluorescent lamps (60cm and 120cm). I toke the following photos for the what is written on those lamps: Please have a look to the ...
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Power conversion causing huge increase in amperage

I've got a transformer ballast driving an HID lamp. When the transformer is wired to 110VAC, it's using about 700mA. When I drive it with a 12v battery and power inverter (to 110VAC) the transformer ...
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1answer
80 views

My TEC1-12710 peltier cell not cooling enough

I have a TEC1-12710 Peltier cell which supposedly consumes 10 Amps but when I connected to the power supply (12-15 Vdc 15Amp 180 Watt) the cell only used 4-5 Amp and didn't give me good cooling the ...
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88 views

Ohms law in solar panel

When 2 solar panels are connected in series, the output voltage is sum of both panels but the output current (measured by short circuiting) is the same as single panel. What I dont understand is that ...
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How many voltage and amps to charge a 3.8 V 2200 mAh cellphone battery? [duplicate]

My charging port is broken. Need to make a charger, thanks for help.
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27 views

Device to measure current in the range of pico Ampere (pA)

I am working on an electrochemical quantitative sensor and considering the reaction rate I can predict a current output in the order of 10-1 pA (pico Ampere). I was wondering if there is any device ...
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In below picture, is ammeter AC or DC? Is there direction for connection with load in series? If so what if I connect in wrong direction?

This is front view of analog ammeter. There are 2 terminals with nut and bolt behind it but nothing marked neither plus nor minus.
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Use a power bank instead of batteries for a LEGO train

I'm tired of charging and charging batteries for my LEGO train. It takes 6 AAA batteries. I have several questions: 6xAAA means the motor needs 9V, right? When using rechargeables they only supply ...
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72 views

Based on this data sheet for the 74HCT173, which section(s) describes the maximum current I can draw per output pin?

I want to size the LED's with resistor in series properly. Thanks https://assets.nexperia.com/documents/data-sheet/74HC_HCT173.pdf
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72 views

Low Voltage, High Frequency, High Amperage Power Supply Design

For an ongoing project of studying magnetic properties of various metals we need to use a power supply which can generate 25 V peak to peak, frequency 50- 500 kHz, 5A (PP) current. Frequency would be ...
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54 views

Why do solar panels need to be the same voltages when in parallel?

I have an off grid solar system which I reciently upgraded from 12v to 24v. I have two 12v solar panels which I put into series to boost the voltage to 24v (I will refer to this as a single 24v panel ...
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27 views

Question regarding a charger modification for a Dell 3100 docking station

I'm quite new and inexperienced to this so I would appreciate any guidance I can get. Given the quarantine situation I need to work from home more so I purchased a used D3100 docking station but with ...
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23 views

Proper wire for universal motor (2000w 220V) and heater element (500W,220V)

We have one dental equipment with one universal motor in 2000W and 220V range shown below: Used at this device: Based this site: Vpeak = IinR, where Vpeak = √2(V) and E = CV2/2 So we have 220v : √...
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70 views

Do I need power supply totalling my current needs to maximum of my current needs?

My prototype project has these 3 components currently: US-17HS4401 stepper motor, rated at 12V / 1.7A MIG-400 6V DC motor, 6V / 10A max (although it was spinning fast enough at 3.75A) Particle ...
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1answer
57 views

Can we get more current by reducing voltage on a power supply?

This is very basic question but I seem can't find the answer. All out there is theory, but no practical explanation about this. Assume I have a 10V 2A power supply. So in theory it outputs power of ...
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1answer
106 views

Will this battery case be able to sustain 3.5 amps?

I'm trying to make a 10S Li-Ion battery case, and I'm currently wondering if it will be able to sustain a current of 3.5 amps running through it. I like to believe I'm pretty good at electricity, ...

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