Questions tagged [amperage]

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

Filter by
Sorted by
Tagged with
0
votes
2answers
37 views

Hedge relay current capacity with additional wiring

I ordered several OMRON “ice cube” 110 VAC relays, contacts rated for 10A (LY2NJ). When I inspected them under a microscope I noticed the contact wires are AWG 24. The rest of my setup uses AWG 18. My ...
1
vote
1answer
115 views

Building a Huge 18650 Battery Powerbank DIY [on hold]

I know there are a lot of threads about this topic already, but I still have some questions about it. Anyways, I am thinking about making a 50-80 thousand mAh power bank depending on the batteries and ...
0
votes
0answers
66 views

Lower amps than expected?

I build an inverter to power some panels of EL paint (If you don't know what EL paint is check out this link). It puts out some very high voltage and I thought I'd check to see what amperage it is ...
0
votes
1answer
100 views

How to reduce 30 amps to 5 [duplicate]

I recently bought a Transformer so that I can make an ionic lifter but it has a max 30 amp output and I’m sure that is way too much for what I need plus Since I have this plugged straight into the ...
0
votes
1answer
48 views

How many amperes can pass through drain-source of a FQPF9N50C if 3.3v are applied to gate-source?

I a playing around with this N-channel mosfet I found at home (FQPF9N50C). Using this simple circuit: I am able to turn on an off the 12v load using by connecting 3.3v to the mosfet. The load is a ...
-1
votes
2answers
47 views

How to determine cross section of cable [duplicate]

I'm looking at this table that suggests a 0.5mm2 cable could withstand 720W at 3A. At the same time I used a cable size calculator online to determine the size of cable I would need to use for a ...
1
vote
2answers
66 views

What's the suitable wire size for 9VDC @25 Amps line?

I am trying to put together the requirements for a cable and I was wondering what would be the most suitable wire size to load the DUT with 25Amps @ 9VDC. I will have few other high current lines ...
0
votes
1answer
92 views

Multimeter seems to be giving incorrect mA reading [closed]

I'm measuring the current drawn from the negative battery terminal of my car battery. I am not sure if the correct reading is 0.16 A or 1.6 mA. I tested with my multimeter on both 10 A and mA ...
0
votes
2answers
76 views

Stacking M.O.T. to create an E-E core

I just came across this site looking for answers on some questions I have concerning microwave oven transformers (M.O.T.). I am currently going into my third year as an E.E. student and I am trying to ...
0
votes
3answers
63 views

What connectors should I use with 5V DC current?

In a personal project, I need to power several 5V appliances which, together, use up to 12A. I want to use a 60 inch cable between a case to which those appliances are connected, and the transformer ...
1
vote
1answer
38 views

Wheelchair battery life calculation

Apologies because I'm sure this is an incredibly basic question and I've tried to work out the answer myself but I'm getting nowhere with it! I'm looking to get a powered trike attachment from my ...
-2
votes
1answer
47 views

Have I burned out my HD motor? [closed]

I accidentally cross connected my external HD and my computer power cables. Only noticed it when my computer complained it was not charging. MY HDD is no working but I have had problems with it ...
0
votes
2answers
84 views

Advice for using 60 watt peltiers? Is 12V 3A enough to get the job done?

The weather right now is so bad and hot! A friend of mine runs a mobile stream and his phone refuses to charge when it is hot. His stream crashes because he can't charge his phone or it overheats. Not ...
1
vote
0answers
109 views

Why are all my motors and transformers failing at this specific location?

At my job there is a vacuum oven. There is a 50 hp, enclosed cooling fan. that circulates N2 gas upon quench, the design of the unit runs 480 volts through a reduction transformer to 230 volts. This ...
2
votes
2answers
55 views

Why can a charger handle more watts at a higher voltage?

Why is it that my charger that has a rating of 100-240 volts and 1.3 amps can handle/input more watts at a higher voltage when doing the formula watts=volts x amps? In addition, why can't it, at a ...
0
votes
1answer
59 views

Integrated circuit which acts as a switch

I have the following problem. I have an electronic door lock with opens the door whenever it is feeded with 12v (tested and it works perfectly). My main issue is that the signal for opening the door ...
-3
votes
1answer
78 views

How do I reduce amps in a DC circuit? [duplicate]

I'm trying to replace my AC adapter with a battery. The AC adapter output is 12v @ 500mA DC. I can get a 12v battery, but I can't find one that outputs exactly 500mA. I'm trying to power a strip of ...
0
votes
4answers
83 views

Solar cell outputs full voltage but barely any amps

So I've asked a similar question in the past, but I'm still curious about something. On a fully sunny day, the solar panel tops out at 5.5v @ 260 mA. On overcast or cloudy days, the voltage stays ...
-2
votes
1answer
53 views

Can I use a 24V 1A AC/DC adapter on a 9V 2A device? If so, are there negative effects of doing this? [duplicate]

I have a gaming chair with a speaker built into it and I lost the cord for it. I managed to find an old xbox 360 cord that fit it but it’s 24V. The chair turns on with the 24V cord but I’m trying to ...
1
vote
0answers
62 views

Reducing Current?

Having a problem with my EV a converted Fiat 500. The conversion is made with part from companies that dont exist any more, so it is hard to get information about them. The car have two batterybanks ...
0
votes
1answer
54 views

guesstimate max current of a domestic appliance

The appliance is a quartz oven, 1000W @ 250V. I am trying to obtain a max transient figure for the current (no oscilloscope on my bench). Opened the oven and checked the writings on various parts - ...
0
votes
1answer
56 views

USB Port Amperage

So I have built a Benchtop Power Supply out of an old computer power supply to power and test misc. gadgets I have created. I would like to attach 2 salvaged USB ports from a junked computer to the 5v ...
1
vote
0answers
38 views

does a higher amperage source help prevent voltage sag?

I'm currently troubleshooting my car's ongoing electrical issues and during the troubleshooting process so far I have gone through multiple OEM alternators and multiple OEM & non-OEM batteries. ...
0
votes
2answers
45 views

do the voltage and amperage applied to a motor matter as long as the wattage stays at what its rated for?

I have an electric 180w motor from an electric go cart which currently runs on lead acid batteries but I want to convert it to have a 18650 battery pack for a power supply but I cant find the rated ...
0
votes
0answers
37 views

Charging Phone with a Modified Power Supply [duplicate]

I have converted a computer power supply into bench top power supply and I am now ready to add some USB ports to charge various devices. On the power supply label it shows the 5v rail is capable of ...
-2
votes
1answer
50 views

How to lower amperage? [duplicate]

I have a power source that gives 5V DC and 700mA. I need to power a ventilator that requires 5V DC and 500mA ± 10%. What is the best way to lower the amperage, would a 10Ω resistor do the trick or ...
-1
votes
2answers
100 views

What amp rating of 24vac transformer for LM317T

I am trying to post a new question about the lm317 to-220. I just want to know what size transformer for lm317 at full 30vdc. I know its a 24vac center tapped transformer but is it 1 amp or 5 amp ...
-1
votes
2answers
166 views

9V battery to 850mA [duplicate]

I am new to electronics and trying to produce 850mA out of a 9V battery. I am just wondering if this would be possible and if so, how to do it.
0
votes
1answer
137 views

Does wiring 18650 batteries in parallel and/or series increase the discharge rate of the whole pack?

I cannot seem to find a solid conclusive answer anywhere on this, but if I build a pack of 6 18650 batteries in parallel which are 3500 mAh each, that would make the pack 21 Ah in total. Then I take ...
0
votes
1answer
38 views

Batteries Spike in Watts and Amps Pulled with less than 50% Life

To give a background on this, I have been running tests to determine the actual lifespan of a 3 cell pack of some Samsung 18650s and Tesla 2170s at just above freezing. The Samsungs are INR18650-35E ...
0
votes
1answer
73 views

How to select current for power supply? [duplicate]

I've two step motors with 12V-0.4A each, A4988 as stepper motor driver and CNC shield on Arduino. As I know I should use at least 2x voltage for stepper motors and I would like to know, if I use 24V-4....
1
vote
3answers
94 views

Maximum safe amperage for LED Strips

A lot of online resources never question the use of high amperage power supplies for powering LED Strips. As an example, 5 meters of low density (30 LEDs per m) WS2812B strips already use ...
1
vote
1answer
195 views

Understanding 5V to 1.8V UART level-shifting circuit

Hopefully it's OK to ask very basic electronics questions here. I had a TTL 5V UART cable, however the board I had only accepts 1.8V max. So I found some online schematics that uses resistors and a ...
0
votes
1answer
75 views

Ammeter scale, not sure what my amp reading is

I have a basic multi-meter that I am using to measure amp on a load. I am trying to figure out how much amps my small entertainment system draws. (LCD TV, PC, speakers.) I want to build a small DC ...
0
votes
2answers
78 views

Can I use this relay?

I got this relay. In the product description they say: "belastet bis zu 10 Amp/250 VAC, 5 Amp 30 VDC." which means: "charged up to 10 amp / 250 VAC, 30 VDC 5 Amp". On the relay it is printed: 10A/...
0
votes
3answers
40 views

Predictions based on resistance measurements not matching reality?

I'm using my multimeter to measure the resistance of my tongue, and leaving it on there for a full minute it seems to average out at around 1.5 Million Ohms. However, when I put a 9 volt battery on ...
0
votes
1answer
183 views

Why can my body conduct electricity from a 9 volt battery?

I've created a scenario represented identically in the attached image . My question is this: When I connect Jumper 1 to my left hand and Jumper 2 to my right, the LED turns on very faintly but I feel ...
-4
votes
1answer
72 views

Crude Li-Po Battery Charging. Is it safe?

So I have this drone and I want to play with it but there are no chargers for it nor are there cables for this kind of li-po here but I have minimal knowledge with electronics, just enough to make ...
1
vote
2answers
62 views

How do I interpret an RGB LED max amperage given as a range e.g. 30mA-70mA?

I have some LED's I got in a mixed package and the RGB LEDs instead of a single max amperage just list a range. One example is I have a common cathode RGB LED with ratings listed as 1.9-3.4v and 30mA-...
2
votes
2answers
97 views

When is it better to have a high voltage and when is it better to have a high current? [closed]

What are the advantages of each? What situation would I want higher amperage than voltage, and vice versa?
2
votes
1answer
66 views

How to replace push buttons on an intercom?

This is the intercom panel in my apartment, it's 30+ years old and I want to give it a face lift. The push-buttons are momentary, and I want to replace them using modern ones like these, but I'm not ...
1
vote
2answers
106 views

Is it bad practice to connect wires of vastly different gauges?

I would like to connect an Anderson plug with 25mm² cable to a 12V AGM battery so that I can easily connect and disconnect different devices which will conduct currents of varying amperage. I may ...
0
votes
1answer
78 views

built in charge controllers take amps they need?

Many devices have built in charge controllers that stop charging when battery is at 100%. I read several places that you can charge devices with the manufacturers recommended voltage and that higher ...
1
vote
0answers
29 views

Responsible Battery Reserve Capacity and Low voltage?

It's been asked here, but looking for clarity. How bad is it to undervoltage a 12-volt lead-acid battery? SLI automotive starter batteries list RC (reserve capacity), but I think this a usable ...
0
votes
0answers
47 views

What power socket for a blue P+N+E plug with an amperage of “2 x 13”?

apologies for the potential stupid question but I've never seen this before. I've got a second-hand bit of kit which comes with, what looks like, a normal blue P+N+E plug however stamped onto the ...
0
votes
1answer
168 views

Trying to increase amperage of Arduino Uno digital pin (20mA) to control a cabinet lock that is rated at 12v / 2A

I am trying to use my Arduino Uno to send power from one of its digital pins to a cabinet lock, the cabinet lock is "fail-secure," so you send power to it to unlock ...
0
votes
1answer
35 views

Struggling to limit current

In short I'm building a relay controller and want to limit the current going to specific relays. My power source is 12V DC @ 20A. For one relay I want to limit the current to 10A and another to 2.5A....
0
votes
1answer
114 views

What defines Volts, Amps, Watts and mAh?

My current understanding is as follows: Volts: Speed of electron flowing. Amps : Number of electrons flowing. Watts: Amps x Volts measured for "some" time. mAh: Very confused to come up with ...
0
votes
0answers
42 views

Voltage and amperage requirements for resistance heating of glass

I am planning to introduce electric heating/boosting in my glass melting furnace. The present temperature of the glass is around 1200 deg C and I need to raise it up to 1300 deg C. I am trying to get ...
0
votes
2answers
81 views

Is my radio pulling more current than it should? [closed]

I have an FT-747GX radio that I am using as a RF generator for a plasma cleaning machine. In the operating manual on page 3 it states: I have a power supply connected to this radio which outputs ...