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Questions tagged [balancing]

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Balanced signal path or balanced in-/outputs

I'm planning to build a small device that can accompany my monitor controller in my home studio. The monitor controller is a TC Electronic Monitor Pilot, it has a volume knob and can select between 3 ...
Jeppe Hasseriis's user avatar
8 votes
4 answers
2k views

Can I stack optocouplers in series to make a higher specification part?

Yet again I'm working with the sub-set parts the PCB assembler house has pre-loaded, and not what is commercially available. Like using 3-6 resistors in place of 1, and more relevant to this question; ...
user1488660's user avatar
1 vote
1 answer
50 views

Connecting multiple loads in self-balancing parallel [closed]

I have three (or 'n', where n=3 at the moment) large LED panels that I want to run in parallel. As we know (or should have known before the 'royal we' actually tried it!), just wiring them together in ...
jackisquizzical's user avatar
0 votes
1 answer
128 views

Selecting Balancing Resistors for HV Capacitor Bank

I am constructing a High Voltage (150 kV DC) capacitor bank. I have elected to connect 10 capacitors in series, with 10 such branches connected in parallel. My next mission is to create balancing ...
Wyll Astarion's user avatar
0 votes
1 answer
44 views

Balance the power of one resistor to other resistors

I have just a resistor of 10 ohms with 0.5 Watt configuration. The circuit does just need more power according to the input current. I calculated it and I have seen that the power raises up to 2 Watt. ...
user avatar
1 vote
1 answer
97 views

Balancing resistance circuit with two voltage sources

Hello, first I'm not sure if the title describes well enough the problem. I have the following circuit. Left side is a part of a voltage regulator. Point A has a fixed potential of 1.2V (a feedback ...
irilinir's user avatar
2 votes
4 answers
1k views

Lithium battery pack charge controller and balancer module function (HX-4S-F30A)

I tried to use this module for a 4S 18650 battery pack: Beside charge controlling it is supposed to balance cells and this is where my issue emerges. If I put some unevenly charged cells in the pack, ...
AKTanara's user avatar
  • 291
3 votes
1 answer
329 views

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 ...
AKTanara's user avatar
  • 291
4 votes
3 answers
964 views

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 ...
Edin Fifić's user avatar
  • 5,481
1 vote
1 answer
639 views

How does balancing via resistors work? Why isn't it needed inside of batteries?

I am building a hobby project - a sort of supercapacitor powerbank, where I basically connected twelve 500F 2.7V supercapacitors in series. Despite these capacitors being from same manufacturer and ...
Petr's user avatar
  • 487
1 vote
1 answer
70 views

Balancing Li-ion cells

I am designing a power management board. The board should be able to distribute the power across a system and manage the power coming from a solar panel, while recharging batteries with excess power. ...
Gianfranco Di Domenico's user avatar
0 votes
2 answers
895 views

How many lithium-ion cells (series) per bms balance channel?

I'm most interested in the application of replacing lead-acid packs with lithium-ion packs for UPS's and/or whole house/solar power banks. I've seen it stated Tesla's automotive packs are 6s with ...
nunya07's user avatar
  • 25
0 votes
2 answers
900 views

Balanced Audio Line Driver Off Single Supply

I am working on a device that needs a balanced audio line driver that can convert an unbalanced signal to balanced and drive a balanced cable run between devices. I am looking at schematics using ...
Emmett Palaima's user avatar
0 votes
3 answers
176 views

Can I safely balance a series/parallel cell circuit to power a 12V soldering iron?

I want to power a 12V soldering iron with 2x 21700 '40T'batteries and 3x 18650 '25R' batteries with a torroidal rheostat between them. The 3x25R batteries will be in parallel. The rheostat will ...
Samuel Drew Crow's user avatar
3 votes
2 answers
1k views

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. ...
Rocketmagnet's user avatar
  • 27.5k
2 votes
3 answers
611 views

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 ...
Rhodexa's user avatar
  • 41
3 votes
4 answers
812 views

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 ...
Rohde's user avatar
  • 155
1 vote
1 answer
115 views

Battery Balancing Board Equilibrium Current?

I just bought some balancing boards for a Bluetooth speaker project and realized after the fact there are two different equilibrium current options. I bought both the 2S and 3S versions as I haven't ...
Hartman9's user avatar
0 votes
0 answers
1k views

Lithium battery charger and balancer circuit (or IC)

I am working on a project which sould charge and balance 4 to 6 (maybe 8 in future) serial connected lithium cell batteries (~4000 mAh capacity) with about 4A of charge current. First I looked for IC ...
NNN123's user avatar
  • 103
2 votes
2 answers
822 views

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 ...
Alex L's user avatar
  • 302
2 votes
1 answer
2k views

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 ...
Forivento's user avatar
2 votes
4 answers
246 views

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 ...
Dustin's user avatar
  • 129
1 vote
1 answer
616 views

Is power balance a relevant factor in the consumption of a house?

Where I live, houses receive up to three phases from the electricity provider. There is a company advertising a power balancing service. They claim that if one of the three phase cables is overloaded,...
Chegon's user avatar
  • 115
1 vote
2 answers
1k views

Does a 3-phase VFD work if one phase is reduced (e.g. with a dimmer)?

If you have a 3-phase VFD running a 3-phase motor, and you use a leading or trailing edge dimmer on one or two of the input phases, will the VFD continue to operate normally, pulling more current from ...
Malvineous's user avatar
  • 1,795
1 vote
2 answers
485 views

How to convert this single ended output to a precise impedance balanced output?

This amplifier suits my purpose with one matter that I couldn’t figure out. Its output impedance is given as 0.01 Ohm. The output of this amplifier will be coupled to a very high input impedance(more ...
user1999's user avatar
  • 1,505
1 vote
0 answers
250 views

How can I balance 2 separate LiFePo4 batteries?

On my boat I've got devices that run on 24V and others that run on 12V. Seeing as how the alternator, wind generator and solar panels are all generating 24V, I guess it's fair to say that this is ...
NomadAU's user avatar
  • 183
2 votes
1 answer
100 views

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 ...
pnatk's user avatar
  • 1,470
1 vote
1 answer
77 views

Can this scheme be used to balance an unbalanced output transducer?

If we want to create fully differential and balanced outputs, and if we don’t have a single ended to differential ended converter/driver, can we use the following scheme neglecting the voltage divider ...
pnatk's user avatar
  • 1,470
0 votes
2 answers
353 views

Are the headset microphone signals travel unbalanced way and how do they reject noise?

Below shows a dynamic microphone equivalent circuit: As you see above, the microphone output is first converted to balanced circuit via the transformer. The signal then travels along the cable until ...
cm64's user avatar
  • 2,217
0 votes
0 answers
312 views

Ceramic capacitors in series to increase AC voltage rating

If I put 4 of 1uFx100V cercaps in series I will virtually have one .25uFx400V capacitor. As I know I should use balancing resistors for even distributinon of the voltage across the capacitors. ...
Roman Matveev's user avatar
0 votes
2 answers
3k views

Li-ion battery cell balancing statistically unnecessary when many cells are in parallel?

Lithium ion batteries packs need to be balanced because of a small random voltage difference for each section in series, that may cause the voltage levels in a pack to diverge over time, right? So if ...
Daniel Caoili's user avatar
1 vote
0 answers
732 views

How do I make a simple bidirectional current limiter

I want to connect two separate batteries together and let the highest voltage one charge the lower one not exceeding the desired current. I expect it to be a solid state solution without the need for ...
BillyBag2's user avatar
  • 149
0 votes
2 answers
191 views

How are load currents balanced in a distribution system?

Below I drew a simplistic view of a distribution transformer which supplies a particular public area for example some households and shops ect.: Va, Vb and Vc are three phases(line voltages) of the ...
floppy380's user avatar
  • 1,885
0 votes
0 answers
215 views

How can 8.4V stacked super-capacitors (EDLC) not require balancing?

I've recently seen 8.4V stacked super-capacitors which advertise themselves as "not requiring any balancing". Namely, the 196HVC series from Vishay. How can this be true? Even if the cells are ...
TRISAbits's user avatar
  • 1,378
-5 votes
1 answer
7k views

Large 10 kWh 18650 Lithium-ion power pack - What configuration? [closed]

I need to build a 10 kWh lithium-ion pack, anywhere from 70 V to 200 V. This is to drive a motor. Power output will not exceed 15 kW. The cells will be Panasonic NCR 'B' at 3.4 Ah 18650. I would ...
Tranceducer's user avatar
4 votes
2 answers
7k views

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 ...
Stephen the Obdurate's user avatar
0 votes
5 answers
1k views

Regulating LED brightness using headphone output

My PCs headphone jack (green) outputs a 4Vpp (2V amplitude) sinusoidal signal at 100% output level set in the sound preferences. What kind of circuit would I need to drive a red LED (2.2V forward ...
zelyev's user avatar
  • 13
0 votes
3 answers
169 views

Can this gaming problem be represented as an electric circuit? [closed]

I'm creating a game where every user has a network of connected nodes that each have a specific amount of energy. The nodes will try to distribute energy evenly amongst themselves. If a node has more ...
Willem Mulder's user avatar
1 vote
1 answer
146 views

LTC4370 load sharing

Datasheet LTC4370 Background: I want to use this chip to combine the power output of two 2.4A USB ports on a USB power bank I have. If this is possible it will output ~25W and w/ my dc-dc converter ...
Aaron's user avatar
  • 95
3 votes
3 answers
2k views

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 ...
Shahid Thaika's user avatar
0 votes
2 answers
582 views

Balancing Mains Electrical Loads

Is there a benefit to the utility company, or potentially to me, for balancing the loads across the two 120V legs in my mains power? this About page suggests some benefit, though the explanation seems ...
Hari's user avatar
  • 676
1 vote
2 answers
2k views

How (do i need to?) do i balance cells during discharge?

i have a 4s4p 18650 lithium ion pack and i balance during charge (from 4 to 4.2V) down to ~5mv difference on discharge i still see >100 mV difference at the end (2.5V). is it worth it to add a ...
guywithaquestion's user avatar
6 votes
4 answers
12k views

Balancing resistor values for series capacitors

I just wanted to confirm my rough calculations are correct in selecting balancing resistors for two capacitors in series. Here are the specifications: two 10,000uF capacitors with 500V rating in ...
Cobi Yu's user avatar
  • 61
1 vote
1 answer
531 views

Quadcopter balance with MPU-6050

It is not uncommon to see people asking about how to balance a quadricopter using MPU-6050. It's also common to see people answering that a PID controller is needed. However, people doesn't say how. ...
Jean Pablo's user avatar
1 vote
2 answers
2k views

Equalizing motors speed for balancing robot

I am currently working on a balancing robot project using Arduino Uno. I am able to get the robot to balance but one of its motor have the tendency to rotate more than the other. I am using the ...
ckong80's user avatar
  • 11
1 vote
2 answers
3k views

Driving mosfet in battery balancing circuit by an mcu

I'm trying to make a simple passive battery balancing circuit using logic level n-mosfet driven by MCU. However, I've got some issue on how to drive the mosfets by the digital output of the mcu, and ...
Jabar's user avatar
  • 11
29 votes
4 answers
9k views

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)....
Tustique's user avatar
  • 559
1 vote
1 answer
991 views

Balanced BNC cables?

I'm working in an experiment with high voltages and unfortunately a high voltage AC source is affecting the signal in my BNC coaxial cable (which is going into an oscilloscope or some other measuring ...
nabla's user avatar
  • 111
1 vote
1 answer
921 views

Using balancing charger with Li-Ion protected cells

I'm making a 2S1P battery pack with 18650 elements, each of which is protected. Cells currently can be charged individually as each has a TP4056 board attached to it, that means charging one cell then ...
Arya Voronova's user avatar
2 votes
2 answers
6k views

Lithium Ion Cell balancing

I’m making a Lithium Ion charger circuit and successfully used a Texas Instruments bq2057c to charge 2 Lithium Ion cells in parallel (4.2V). Now I want to do the same with the cells in series (8.4V). ...
Nimyz's user avatar
  • 121