Questions tagged [parallel]
More than one of a thing, performing the same task simultaneously
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What configuration is better to parallel two 5 V SMPS?
I'm designing a small 5 V SMPS which I want to use in a 5 V parallel configuration. I want to use OR-ing diodes, but these give me a drop of 0.2-0.4 V. I came up with a better solution, but I don't ...
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Is this a series or parallel circuit? Why? [closed]
I don't understand if this is a series or parallel circuit.
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Equivalent impedance of a circuit
I'm trying to figure out the equivalent impedance of the right side of this circuit (so the capacity, inductance and right resistance) :
I see this result in the solution of my exercice:
But I don't ...
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How can I power a bulb filament with a mixture of series and parallel circuit?
I am trying to power a bulb filament that has a rating of 3.0 V and 2.5 A.
First I made sure the filament worked by powering it with a variable power supply and setting the voltage at 2.5 V:
This was ...
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How to power two motors using a single Li-po battery
I'm trying to power two motors using a single Li-po battery.
On/Off control of motor 1 is to be through a MOSFET switch.
On/Off control of motor 2 is to be either through a MOSFET switch or a ...
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LED parallel strings running off 2 AA cells
Out of pure curiosity, I purchased a LED string powered by 2x AA cells. There are 20 LEDs, all wired in parallel and in the sequence Blue, Green, Yellow, Red,- repeated 5 times. There are no other ...
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Connect parallel li-ion packs of different manufacturer, but nearly same capacity
I have 2 pack x ~900 Wh (each consisting of 24s2p LG M50LT cells). I’m planning to buy 3rd pack - but dealer have only packs of Samsung 50E cells. Is it ok to connect them in parallel to increase ...
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Reading two 16 bit ADC with two MISO lines each for its two channels using an STM32H723ZG
In my current project I am using a STM32H723ZG Nucleo board on a custom shield PCB with two AD7380 ADC's which amount to 4 signal channels.
The goal is for the next PCB revision, to read out all 4 ...
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How computers put signals in order (handling memory (system bus) access in multi-core system)?
My journey started from the question: "If I have 2 cores that want to write values in one memory address at the same (literally) time, how does a computer manage such a situation?"
After ...
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Generator parallel same voltage maximum phase shift?
Two gasoline generators rated 6.5kw and 9kw 240vac split phase. Voltage equalized.
Anyone could explain how the generators remain locked in synch after coupling? I believe is a sweet spot where the ...
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Need help understanding speedup in parallel computing [closed]
I am currently studying computer architecture and I am having some trouble understanding the concept of speedup in parallel computing. I came across the following statement: "Before the multicore ...
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Power transformer with four similar secondary windings connected in parallel
I need help with the math that is glossed over in nearly every explanation I can find on the web.
I have a transformer with a toroid core and primary that were professionally assembled and rated at ...
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SMPS transformer datasheet specifics
Here is an excerpt from a typical ferrite switching transformer datasheet:
This happens to be the Wurth 750311771.
Questions:
Two standard primaries are depicted on the left. This datasheet implies ...
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Unexpected voltage drop in parallel circuit
I have a 5 V, 60 A power supply powering a few LED "blocks". I have these blocks powered in parallel, which is why I'm confused when I measure the voltage across each block. The further away ...
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Calculating the voltage dropped in a series/parallel circuit
I’ve been trying to figure out a way to solve this problem to no avail. I think it’s got to do with a voltage divider or voltage dropped. I’ve seen a number of questions on this topic but never one ...
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Help with determining power dissipation of resistor in parallel
I've been struggling with this question for a while for some reason, even though it seems much easier that it should be. The question asks for the power dissipated in resistor R (the one in the middle)...
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SPI vs parallel data/address bus - speed and data troughput
I have a digital board (developed more than 10 years ago) which has a DSP and an FPGA that communicate over a parallel 16-bit data + 16-bit address interface. In the FPGA, there is a sort of dual-port ...
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How does putting an LED in parallel with an 8-bit computer load affect the voltage/current of a circuit?
I was watching this video by Ben Eater on building an 8-bit computer: Youtube Video time: 1:51.
He has this circuit:
Right before the 74LS245 he has 8 LEDs in parallel with the 74lS245 IC. I am a ...
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LED driver circuit with a resistor and a capacitor parallel with an LED in automotive dashboard
I'm reversing engeering the dashboard of my motorbike (Yamaha T7 - 2019) and I found and a lot of circurity just to control the LED of a turn blinker.
I figure out this schematic:
Why did they put a ...
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Are two capacitors connected together considered to be parallel or series?
If both ends of two capacitors are connected to each other but in such a way that the positive end of one capacitor is connected to the negative end of another capacitor, do we say that the capacitors ...
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How can I safely replace laptop battery pack cells before removing the old cells?
Replacing lithium ion cells in an old laptop battery pack, I want to connect the new cells in parallel before removing the old ones to avoid the BMS locking (if it even would do that). The pack uses ...
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Can I use two voltage regulators connected in series?
For my project I'm using 2 regulator, 8V (UBEC) and 5V (LM2596). What is a better idea, connect them in series or parallel?
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Compute value of a parallel circuit R1 || R2 || ... || Rn
Just a quick question:
(If you need the photo of the exercise text to understand this question, let me know, I've tried to make it simple without the photo.)
I was solving an electric circuit problem ...
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Add additional LED to illuminated momentary power switch
I am using a microcontroller-based 5V input, 5V ouput power-switch (PetrockBlock) for my Raspberry Pi project. It provides pins for a power switch and for a power status LED. I am using a momentary ...
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How can I calculate RC circuit impedance and phase difference in parallel?
Most of articles on the web, define capacitor as ideal capacitor. I want calculate impedance and phase difference of this circuit with capacitor ESR.
For example :
simulate this circuit – ...
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CD4066B switches in parallel to lower Ron
In a music synthesizer design, I use two CD4066B gates (with complementary control) to switch on or off a VCO control voltage.
One is in series with the control voltage and the other connects the ...
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How should I drive my LED panel of 200 diodes?
How should I drive my LED panel of 200 diodes?
Context
I'm making a board of ultraviolet diodes that will project light onto a photosensitive copper-clad board and etch a design on it with an LCD with ...
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Connecting two receivers in parallel to electric fence
I want to be able to turn my electric fence (Nemtek Wizord 4) using the Sentry 1 channel receiver (this came with the Wizard 4) and also my own IOT switch.
Below is a pic of the Sentry 1 channel ...
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How can I charge this battery mess? (Charging cells in series connected to cells in parallel)
I have two groups of cells, Group A and Group B.
Group A are 14 cells connected in series, with each having 1,5 V = 21 V.
Group B are 7 cells connected in parallel, with each capable of 3 A = 21 A.
I ...
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Are these resistors in parallel?
I am self learning, this is not for a class, just for my own understanding because I am curious.
I think I have a fundamental misunderstanding of parallel resistors. The way I understand it, two ...
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Is it reasonable to use two LDOs in parallel for redundancy?
I'm trying to have redundancy in part of my design.
I want to use two LDOs in parallel before an OR-controller (specifically, an LM66100-Q1.) One LDO is enough to feed the system, so it will not be ...
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Achieve the same intensity with many LEDs
I want to ask question about intensity control of parallel LEDs.
How can I achieve the same intensity for all LEDs?
Here follows some details.
What I want to achieve is to light up 10 (or more) ...
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Need help in wiring a parallel DAC, BA9221
By looking at the data sheet of BA9221 (http://www.synfo.nl/datasheets/BA9221.pdf) it appears to me (rookie here) that some connections are left out from the diagram. And since I have only 2 pieces of ...
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What size power supply for LED strips?
I'm not getting a clear answer to this from my reading or reviewing previous questions here. Is there a difference in the power supply requirements if LED strips are wired in parallel vs serial? ...
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Why do hard disks use only one head at a time?
I just came across this 2019 article where the author uses microbenchmarks to map the layout of sectors on harddisks. One of the things discussed is that disks switch to different heads after reading ...
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Source transformation - parallel resistors
In the book's circuit, we have 6 Ω and 4 Ω resistors in series, and we have a 10 Ω resistor in parallel to them. I don't understand how we sum these resistors and find 20 Ω for the equivalent resistor....
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Parallel resistances in 'C' configuration
If we have three resistors, two resistors on two separate nets with a third resistor connecting these two branches together, how do you calculate their total resistance?
I thought the three ...
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Why does this transistor shut off when another one is connected in parallel?
I'm trying to build an XOR gate following this schematic without any simplifications:
Here is the circuit itself:
T1 and T4 are inverting the signal (the NOT gates), T2/T3 and T5/T6 are the AND ...
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AGM battery bank - series/parallel - uneven voltages
I'm setting up a DC battery bank
I have 6 X 170ah 12v AGM powersafe batteries
A Victron skylla 50amp/24v battery charger. And a 24v inverter that I'm yet to wire in
I wired 3 sets of 2 batteries ...
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Question on NiMH battery circuit configurations
How do you calculate the total capacity (mAh) of batteries with unequal capacity when connected in parallel? Is it just simply the sum total of the capacities, or something else, like 4 times the ...
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The higher of two voltage signals "wins"?
I'm not an electrical engineer - far from it. I own a driving school. Essentially I have the electronics knowledge a 10 year old might gain from an educational "electronics lab kit".
I am ...
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Charging six 3.7 V, 9900 mAh lithium-ion batteries in series with a solar panel configuration
I am trying to build a system that charges three batteries in series that are 3.7 V each with 9900 mAh each.
I want four solar panels rated at 1 W, 6 V, and 160 mA each to charge the batteries. What ...
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Calculating reactors for parallel connection of thyristors (SCRs)
I have been looking for more information on how to connect two thyristors in parallel in order to balance the load. From what I have found there are two options: either using balancing resistors, ...
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How do MOVs work for surge protection?
I'm trying to understand how MOVs operate but all my online reading is calling my understanding of electronics into question.
The above diagram seems to be the typical layout of a MOV used for surge ...
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What's wrong with my RF amplifier? Transistor in parallel
Everything is OK with power consumption, no SWR or any wrong temperatures, but I'm not obtaining more than 900 mW. It's supposed to have 2 W and 30-35 dB.
The centered frequency is 2.4 GHz. The RF ...
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Yacht generators with common neutral - Voltage Balance & Harmonics
In a marine application, a yacht using two generators (not connected in parallel), to feed 7 separate circuit panels, separated disconnects but common neutral.
Both generators have their neutral ...
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Best efficiency - Series branches within parallel or parallel branches within series
If I were to wire 25 LEDs, providing them with enough voltage to run 2 diodes in series without any drop in light output, would it be better to run a parallel circuit with 2 LEDs per branch or a ...
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Can three 7Ah batteries be connected with one 22Ah battery?
I have three 7Ah 12V SLA batteries and one 22Ah 12V SLA battery. I want to make a 24V system.
Is it safe to connect three 7Ah batteries in parallel to form 7x3= 21≤ Ah and connect that in series with ...
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Resonance in a series parallel combination circuit
This lc circuit has capacitors in parallel and series with the inductor. What happens at resonance? Will it be parallel resonance, series resonance or can you have multiple resonances? Is the total ...
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Can I connect homemade battery packs in parallel?
I'm working on batteries to run an underwater drone and a follow-boat using 3.7 V, 3400 mAh Li-ion cells. I need a voltage of around 18.5 V and around 20 Ah.
The thought-up solution was to make ...
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