Before the spark, there is no current at all, only a voltage (potential difference) between two points. Arc discharge happens when the voltage is high enough to overcome the gap, and then continues when conductors are drawn apart until the plasma dissipates. This depends on how large the gap is; you can easily draw visible sparks from a 12V power supply
Car battery died. It''s happened before because it just sits here. I''ve charged it before this way and it''s worked perfectly fine. Except now it''s making a buzzing sound that''s like a phone vibrating on a table. (see video). I''m using a Stanley Bm1s. The light on it blinks on whenever it makes the sound. And off whenever the sound is off.
Each cell in a lead acid battery is 2V so you look for descrepencies of about 2V. For example if you expect a lead acid to rest around 12.8 fully charged but it rests at 10.6, that is usually a shorted cell which usually can''t be fixed. If it rests at 12.8ish but drops to 10.6 under load that means you have a weak cell.
A regular carbon 9V battery tends to make a wah pedal, and other effects, sound a lot richer, fuller, more dynamic, livelier, and just a lot better in many ways that are hard to describe. I recommend checking out the video I''ve linked above.
SofieCou wrote: I know and I have that but that''s completely useless when I''m not on my laptop.. Then have a suggestion ; Product Feedback - Apple and make it known to Apple regarding this ongoing issue.. Request Apple Re-Write the Entire Operating System to Add this unique feature. want to hear when the battery is full when I''m not on the laptop so I can
The noise is likely hydrogen gas leaking out as it''s produced. Nickel metal hydride (NiMH) batteries use a metal hydride (MH) for energy storage. When this Hydride is
If it is the battery try a 100uf low ESR capacitor across the battery terminals. After that the battery will get lower level pulse currents. If you suspect the inductor, try squeezing it
If there were simply different electrical potentials at different places in a circuit, and electrons could move throughout the cicuit, they would quickly move to make the electrical potential equal everywhere and then current would cease. That tells you that there must be something else going on in a circuit with a battery. We''ve discussed the ideas a bit in previous answers:
You''ll here a buzz, thats the battery, then you''ll here it spooling thru N (nancy) stages. The word "spooling" does not refer to the battery, it refers to the engine. The battery is static and does not spool. There are several measurements or indications used to convey a turbine engine''s state. One of them is N2 (others include N1, Engine
Most likely root cause : battery voltage is too low or at the limit of fault detection. Easiest solution: use a "battery booster" to "momentarily" bring your battery up to the correct voltage, and leave your current charger connected. It will then bypass the built-in protection of your charger, and it will load your car''s battery
If you do not hear a sound, check your battery setup and all your cable connections, or refer to the Frequently Asked Questions. Make sure you did not connect the buzzer backwards by getting red and black wires mixed up. Remove the buzzer from the alligator clip cables before you continue with the next step. Measuring Voltage and Current Output. Prepare a data table, like Table 2,
Your reasoning is sound, and as you correctly point out the conclusion is false. Therefore you know that the premise must be false. In fact, voltage does not generally cause current to flow. In a capacitor you can have voltage with no current and in an inductor you can have current with no voltage. Active circuit elements similarly do not have
In order to prevent boil over from occurring, make sure you do not overfill the battery with water. Also, use battery chargers that have regulated flow and do not charge at a rapid rate. Can a car battery be charged too high? Yes your charging current is set too high. Also check that the final float voltage from your auto charger is correct to
This calculation considers: Battery Capacity (Ah): The total charge the battery can hold. State of Charge (SoC): The current charge level of the battery as a percentage. Depth of Discharge (DoD): The percentage of the battery that has been or can be discharged relative to its total capacity. Total Output Load (W): The total power demand from the connected devices.
It''s often called capacitor whine or capacitor squeal, and it''s found in many electronics, not just battery chargers. I can''t think of anything else that would make a high pitched squealing sound
The reason you''re seeing such a large range is because a battery is better thought of as a fixed voltage source, not a current source. If you have a 12V battery and you''re asking how much amperage can it kick out, the
It is most likely noise from the charger not the battery. A bunch but not all of the m18 chargers make a slight hiss or whine when charging a battery. If it is actually the battery making the noise you have a big problem and need to dispose of it immediately before
To make your own battery at home, all you need is two different types of metal, some copper wires, and a conductive material. Many household items can be used as the conductive material into which you place your metals — for example, saltwater, a lemon, or even dirt. This battery creates electricity because the soda acts as an electrolyte for the copper strip
Car batteries can buzz or vibrate while charging because of an imbalance in the cell voltages. This is usually caused by a shorted cell, which causes an uneven distribution of
The current will start to drop as the battery begins to drain. Important: Do not connect the multimeter to regular batteries (for example AA or 9 V) with these settings. Regular batteries can provide much more current than a potato battery, and can damage your multimeter.
Like the rest said: no battery = no sound. But... try it! Remove the battery and you''ll see for yourself. As the battery dies usually teh sound degrades. You may hear some distortion at times, and it may happen more frequently as the battery continues to lose power. My Warwick Corvette $$ actually started squealing last time the battery was
This produces byproducts like liquid and gas. The former can be seen when a battery goes bad and leaks out. The latter can be heard. It''s normal for hydrogen gas to be produced. The batteries are not sealed, to allow this gas to vent. But misuse of the battery, or if it goes bad, excessive amounts of hydrogen gas is created. This, along with
If the battery cannot reach higher than 10.5 volts when being charged, then the battery has a dead cell. If the battery is fully charged (according to the battery charger) but the
I''ve made a prototype working on 12v - it''s just an opamp comparator that goes high and low and i''ve connected a piezo speaker to output of opamp with a cap in series. It makes clicks when opamp goes high or low and they are just loud enough, but when i lower voltage to 3v, i can barely hear the speaker. Can anyone suggest me a solution?
Devices that generate a sound waveform may run slow, which makes the sound distorted. DC electric motors will run slower and slower as the voltage drops, until they get to the point of not
You guys have never heard of this before. Most of you at least. I own 2 iPhones bought in a legitimate Chinese Apple store. Whenever I use it, they would make a tri-tone dying robot low battery sound at 20% and 10%. This will sound even if you''re on silent. So to turn it off (you can''t) you''d have to change your ringer volume. There are no apps
This can cause problems because the current flowing through the hole or crack can heat up the conductor, potentially causing a fire. The fuse is designed to break the circuit if the current flowing through it gets too high. This protects you from fires and
While most people are familiar with the symptoms of a dead battery, such as the engine failing to start, there are also several auditory clues that can indicate a bad battery. In this article, we will explore what a bad battery sounds like and how to identify these sounds to address the issue before it becomes a more significant problem. 1
This not only provides a good experience for the user, but also helps the battery management chipset learn the battery, which will help it manage the battery better. If you want, you can put it on a slow charger (basic .5 amp 5 watt charger, no fast charging) in a room with hard floors, and let it trickle charge up to full, then try again (and
A dead car battery can actually make some surprising sounds, hinting at its demise. From feeble clicking noises to complete radio silence when turning the key, these auditory cues can signal trouble under the hood. Understanding what a dead car battery sounds like could be the key to avoiding being stranded unexpectedly.
Battery banks should be silent, save for a fan if it''s a very large one. Any other noise means it''s likely not functioning correctly, and has the potential to explode/go up in flames at any time, in use or not. Voltage converters and
The noise is likely hydrogen gas leaking out as it's produced. Nickel metal hydride (NiMH) batteries use a metal hydride (MH) for energy storage. When this Hydride is exposed to moisture in air it reacts to form hydrogen gas: For (b) I would say that your battery is probably not usable—safely or otherwise—anymore and may present a fire hazard.
No one has mentioned the fact that a Lithium Ion battery is made using interleaved flexible separators. These will attract and repel each other as the power is switched on and off by the PWM controller. That sounds like a plausible reason for the buzzing and would be something good to know in future.
Still, you can sometimes get audible sound from this with high voltage circuits. Electrodynamic force. A moving charge creates a circular magnetic field around it. The magnetic field is proportional to the current, and can be made quite strong by looping the wire into a coil.
It isn't expanding or contracting the material, that emits the sound in transformer or inductor-based circuits. However the parts are moving. Transformers are subject to significant mechanical forces caused by the alternatine electromagnetc fields. That causes wires and laminations to move, and hence emit sound.
The core of a inductor actually changes size very slightly as the magnetic field changes. This can cause audible sound, especially if the inductor is mechanically coupled to something that presents a greater area to the air, like a circuit board. +1 Now I'll have to find a cat to rub a balloon against it and test the eletrostatic force! :)
Some capacitor materials exhibit enough of this effect that when rigidly mounted on a circuit board can cause audible sound. I had to respin a board once and replace a ceramic cap with a electrolytic just because the ceramic was causing annoying audible whine. Magnetostrictive effect. This is the magnetic analog of the piezoelectric effect.
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