Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [balancing]

61 questions
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4 answers

Why are the three component LEDs in an RGB LED so unbalanced?

I was recently spec-ing some RGB LEDs for a project, when I noticed that the millicandela ratings on the three colors are rarely close to the same number. (i.e. 710mcd Red, 1250mcd Green, 240mcd Blue). Does this cancel out somehow, or does this mean…
Tustique
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Balancing Resistor Values for Series Capacitors

I just wanted to confirm my rough calculations are correct in selecting balancing resistors for 2 capacitors in series. Here are the specs: 2x 10,000uF Capacitors with 500V rating in series. I found this estimation equation online: R = 10 / C…
Cobi Yu
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Connect Wii balance board pressure sensor to an Arduino

We have a Wii balance board pressure sensor and were wondering how we could connect this sensor to an Arduino board. On the circuit board (see picture) of the Wii Balance Board are Japanese characters printed, only those are pointing out which…
Carlo Matulessy
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I need suggestions/feedback on my simple active balancer schematics for two 12V batteries in series

Since I currently use a 24V battery system for my house using 16 12V car batteries (2 parallel banks of 8 in series with each other) and use the lower 12V side for additional devices, (as well as due to the difference in age between batteries and…
Edin Fifić
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4
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Balancing NiMh batteries in series over a long term

I'd like to place two NiMh batteries in series to drive a string of single LEDs. I can charge them simply at C/20 or so and the output will be intermittant so the batteries will never reach half charge. However, this will be in a permanent fixture,…
Stephen the Obdurate
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Modify lithium battery pack balancer

This is the lithium battery pack balancers available to me: As Robojax has extensively explained in this video, this module is capable of balancing batteries with 67mA current (4.2v/62ohm) that is way too slow for my application because my charging…
AKTanara
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Locally hatched ground plane to increase differential impedance

I am designing a flexible PCB to carry two types of differential signals. One is about 1.2Gbps 100R differential impedance, while the other is only 3Mbps, with much more tolerance on the impedance. It was very hard to achieve a differential…
Rocketmagnet
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Current balance capacitor

Most series capacitors needs balancing resistors to keep the same voltage across them, but in my case, I'm using with three capacitors of 45uF in parallel that are working very close to its maximum RMS current rating. I'd like to know, is it…
Rohde
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How to limit voltage charge of supercapacitor

For a DIY project, I plan to charge an 100F 2.7V Supercapacitor using a 3.7V Lithium-ion 18650 battery. However, I need it to charge only until 2.25V. Is there a simple circuit that I can build to limit the voltage\charge? I basically need the…
Shahid Thaika
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balance charging current for batteries connected in series

I've been using this simple Li-Ion charger for quite a while. It consists of 4x 18650 Panasonic NCR Li-Ion "unprotected" batteries (3.1Ah), connected in series (2+2). Charging was going well with cell voltage difference of approx. 0.05V. After the…
FlegmatoidZoid
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Chaining TP4056 modules, the proper way

I know a similar question was asked before, but still, it didn't aswer what I'm looking for. I need to charge a series of 6 Li-ion cells, and maybe 12 in the future for a voltage hungry project. Since a have a bunch of TP4056 modules laying around,…
Rhodexa
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Why does a Double-Balanced Mixer Reject the LO?

Look at the image of the so-called Double-Balanced Mixer (this is the active version). I understand why there is no leakage of the RF frequency in the output (because the LO square wave by which the RF gets multiplied at the output does not have a…
Alex L
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Balancing of 18650 battery with parallel cells

Does a 1S4P 18650 battery need balancing? I read a lot about balancing around the internet. To me it seems like this only applies to the cells connected in series. An all parallel setup would not need balancing. Is this correct?
Forivento
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Impedance Matching Long 2000 meter Transmission Line

My apologies if this isn't the most appropriate forum to ask this question, but I have found the response from users on this form to be extremely helpful in the past with my electrical questions. I am new to impedance balancing so bear with me. I…
Dustin
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Does impedance balancing in the far end make no sense?

Below shows a conversion of unbalanced line to a balanced one: My question is about: if the unbalanced line is very long which means the signal source and the isolation amplifier is apart from each other 100 meters for instance. In that case, if…
pnatk
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