Questions tagged [parallel]

More than one of a thing, performing the same task simultaneously

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Parallel light failed to work, one light get's blow other remains good. How to get it working?

I'm using a mobile battery (4V) to power the two (each takes 3.0V) light in parallel since series circuit won't work with one battery. After connecting the wire, for a short time it did work. Then one ...
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45 views

input parallel capacitors for rectifier in flyback

When should we use multiple parallel capacitors instead of a single one in input rectifier topologies of switching converters such as flyback?? What are the advantages and disadvantages?? thankfully
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Calculating total resistance

How do we calculate the total resistance from A to B R1||(R2+R3) but the same can be said for R2 so how does it work? simulate this circuit – Schematic created using CircuitLab
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Flash devices that allow write (or read) and erase in parallel?

Is there a flash device that allows you to read/write and erase in parallel (as long as they are in different sectors/blocks naturally - so we can ignore chip erase)? Just to be clear, I don't expect ...
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47 views

General query on batteries in parallel

I’m new to batteries charging and discharging and I have some general questions: If for example you have AA batteries being charged in parallel do they behave similar to how a load resistor would do (...
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1answer
58 views

Gauging Wire for 12V Parallel Circuit

I'm building a 12V parallel circuit to run some LEDs...I simplified it in the picture below but need some advice on wire sizing in a parallel circuit. The combined amps of the 3 lights is ~11.25amps. ...
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58 views

Crystal frequencies

the context is that I am working on project which uses a 32 768 Hz quartz oscillator used for a uC. My questions are: I have read that series resistance should be low (25 to 100 Ohm) otherwise it can ...
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2answers
105 views

Wiring LEDs in parallel [duplicate]

I'm making progress on building a portable light for my kayak. It will use 3 of following chips: 50W, 12V chips. The battery will have to be portable so I'm planning to wire them in parallel. I ...
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855 views

DC Parallel Breakers

I need a single-pole circuit breaker for a 200A, 48V DC battery bank powering a solar inverter. The batteries are LiFePO4 and capable of large short-circuit currents on the order of 10 to 15 kA. ...
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1answer
25 views

can I parallel two TP4056 to charge 1 cell?

I have a 3600mah Li-ion battery and I want charge it at 2 Amps. I want to use TP4056 module but its output current is 1 Amp max. so I decided to use 2 module in parallel like I draw in photo is that ...
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30 views

Speaker connections [closed]

Hello and good day to all. I have a McIntosh C2500 preamp. Also 2 Klipsch 8 ohm speakers and 2 Elac 8 ohm speakers. My question is what is best wiring connection for them to this McIntosh pre amp. ...
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Does my total power supply voltage need to equal the sum of the voltages in my circuit in series?

If I have let’s say, 4 bulbs, each rated at 1.5 volts and they’re all connected in series. Would my battery need to be rated 6 volts? My logic is that each bulb would have a voltage drop of 1.5 volts ...
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What is the flow of current with two parallel voltage sources? [closed]

Good day ! I am a physics student and not an EE so I'm quite hesitant with approaching this circuit problem. What will be the equations for this analysis? Will their be current in the red line even ...
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372 views

Is this power supply suitable for powering these chip on board (COB) LEDs?

I have an LED project using 100 Citizen CLU048-1212C4 LEDs. I need to run each LED at 70W, and I want to run every 5 LEDs on 1 power supply. I was thinking of using the MEAN WELL LSR-350-35 (it takes ...
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Charging 2 x 14S6P battery packs

I built 2 14S6P battery packs which each have a BMS with a separate port for charging. I am wondering if I should wire a separate charger to each battery or can I create a parallel charging cable ...
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59 views

Connecting two similar, equal voltage batteries in parallel

I am trying to increase the range of my son's child electrical vehicle. It came with a 12V 10Ah battery. I bought a second one, which is 12V but 12Ah. It may have other differences too, but it looks ...
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58 views

Calculating resistance in theory

I'm studying about calculating the Equivelant Resistance in some circuits and I haven't figure out how to calculate this one I thought the way to go was to do ...
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43 views

Efficient strategy to acquire multiple spi interfaced sensors data in parallellover several spi buses?

I want to continuously acquire temperature from many ( ~20) thermocouple MAX 31856 all on one PCB ultimately. This chip interface with spi. The project language is python Because of the sensor latency,...
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36 views

How does series parallel combination of LEDs affect the temperature rise?

I was designing the LED light of 200 W with LED combination of 9 series / 8 parallel, each LED is 6V thus total output voltage is 56V. I am using Meanwell xlg 200 W driver. But this resulted in high ...
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172 views

How do i simplify and calculate the resistance this circuit?

I am studying this circuit and I tried to simplify it like so, I'm confused since there is a wire atop A surrounding the "square" wire. I calculated its maximum resistance as 63.77 ohms. ...
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2answers
72 views

Dual Power Supply for single 10m LED Strip Run

This is my first time here so sorry for any wrong formatting. I am currently creating a project where I will run my wall with 10 meters of addressable LED strip (Made up of 2 x 5 meters rolls). I have ...
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107 views

Problem of transistor thermal runaway in parallel connection

simulate this circuit – Schematic created using CircuitLab I wanted to use two transistors in parallel to increase current rating. So I simply put two transistors in PCB design. Later I found ...
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29 views

I have two lithium battery packs with separate BMS, Can I connect the packs in Parallel?

I have two lithium battery packs with separate BMS, Can I connect the packs in parallel, will the BMS get damaged or will something happen? 12v 10ah battery pack, I have three in total and each has it'...
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75 views

Parallel connection of DC DC Converters with different output to charge the battery

Generally, in connecting power supplies parallel one can follow current control or droop control rather than voltage control to regulate the output of a dc dc converter. If the output of both the ...
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Paralleling of battery chargers [duplicate]

Can we parallel the bbattery chargers suppose buck controllers.Two buck controllers taking power supply from the same power bus. The output of each controller will charge the batteries connected at ...
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1answer
47 views

Best practice for paralleled four leg shunt resistors connection to a shunt amp, and best placement

I am using three WSK12161L000FEB paralleled together on a four layer PCB for a three phase motor controller (9 shunts total in design, 3 for each phase) From my understanding, a kelvin connection to ...
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1answer
53 views

Connecting two PSUs in series and parallel

So I have 2 identical 1W DC-DC converters (9V -> +/-5V). The converters are isolated to 6kV. The exact part is: XP IHA0109D05. If I connect both (using the same battery for each one) in parallel ...
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1answer
54 views

What is the best way to connect different LEDs?

I'm working on my first PCB for horticulture lighting and wondering what is the best way to connect all LEDs. The idea is to use both white LEDs (using Samsung's LM301H LEDs that require 2.75V@65mA ...
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68 views

Parallel transistors for brightness control of large quantity of LEDs

I'm working on an art project that consists of ~180 LEDs with about a dozen fading/flashing PWM patterns, with each pattern group/circuit controlled by a PN2222A transistor on the cathode side, with ...
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2answers
69 views

Parallel execution in a single ALU

I read that in theory, it is possible to use the circuits in an ALU in parallel. Now I am wondering whether there is any way to leverage this in practice on commodity CPUs? Specifically, I want to ...
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5 LEDs work in parallel but not in series. Why exactly?

I've been learning electronics very thoroughly for the past couple of weeks. I'm running experiments on LED circuits at the moment and there is one thing that is completely beyond my comprehension. I'...
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1answer
36 views

Calculating maximum series/parallel configurations for unique resistors

Say I have 4 unique resistors. How would I calculate all the possible unique series and parallel configurations and thus, calculate all the possible total resistances? And how can I expand this to ...
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31 views

Parallel resistor and current source analysis

I'm a little bit confused by this circuit. I want to analyse the current "I"s AC and DC terms. Since the capacitor will allow AC, there will be an output current Iout which is the sum of Ir ...
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3answers
62 views

Connecting batteries in parallel to the existing batteries that are connected in series

I have 6 12V batteries all the same volt and same amp. I need 48V to use and I connected 4 batteries in series to get the 48V, but two extra batteries are just laying there doing nothing. I thought of ...
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1answer
38 views

6V lead battery to 3.6V li ion to add capacity to LED motion light

Is there a way to hook up a 6V lead battery in parallel to a 3.6V li ion battery that powers an LED motion detector light? Also - it is solar powered. So ideally it would charge too. Currently, I ...
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61 views

Wiring 2P2S battery pack

I have 4 18650 batteries and I want to make a battery pack of it. If all the batteries were new and had similar voltage/capacity I could easily charge them all together in parallel with my charger. ...
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3answers
60 views

sync signal on parallel DC/DC-Converters

I am currently designing a circuit to drive a high power laser-module at 12V/40A. I found the idea from Marco Reps https://github.com/marcoreps/laser_driver very inspiring for my design. Since the ...
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2answers
67 views

Parallel resistor before voltage amplifier

For my project, I would like to amplify the output from a photodetector for subsequent analysis with an oscilloscope. The output of the photodetector is a current. Since we are using a voltage-...
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1answer
31 views

Confused about the functioning of a QRE1113 reflectance sensor

First year IT student here. I've been stuck on a problem involving a QRE1113 sensor, in which we were given the schematics below: From my understanding so far, the reflectance sensor is divided into ...
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96 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 ...
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1answer
51 views

Help with LEDs in parallel

I am working on a project where I have to use string LEDs running on 5V (USB power.) I had purchased one such string, which is 10m in length and has roughly 50 LEDs inside. My specification requires ...
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1answer
150 views

Circle with arrow symbol interpretation in circuit

I am trying to find all currents in this circuit: (Question 19 from https://www.allaboutcircuits.com/worksheets/algebraic-equation-manipulation-for-electric-circuits/) Although I'm familiar with Ohm'...
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1answer
29 views

Parallel Caps as a Bipolar (twin polar in combination)

So, I saw a similar question about 2 caps in series to make a bipolar. Lets assume polar electrolytics I pretty much "get" electronics and build stuff - it works as I expect mostly. I have ...
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2answers
65 views

Driving 120 V socket from two different switches/circuits

I have a garage 120 V overhead light connected to a light switch at the entrance. When the garage door opener engages, another 120 V light on the opener lights up but that light with one bulb is ...
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Parallel Power Supplies

I have an application where we are supplied 24VDC but need to drop that down to 5V for some of our control circuitry. For DFM reasons, we are limited to buck converters that can only safely supply 3A; ...
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67 views

Can you help me understand this equivalent resistance problem?

It is said that \$R_{th} = 12 \parallel (2+8+10)\$. Why isn't it \$ 8 \parallel (12+2+10)\$?
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116 views

Best practices for parallel DC/DC Boost Converters

I'm working on a portable project that takes 4 (appropriately-rated) Li-Ion cells in a 4S configuration (14.46-16.8V) and boosts it to 27V for a 10-20 Ohm resistive load (soldering iron). The ...
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2answers
53 views

Clarification of “strobe pin” 4-bit latch/4 to 16 line decoder

I'm wondering if I can get a specific behavior out of this chip. I have read the data sheet and am having some trouble understanding the usage of the Strobe pin. CD4515BM96 Datasheet PDF USE CASE I'm ...
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104 views

Small DC motor in parallel - what battery to use for powering the circuit

I am very new to the word of electrical circuits. As I finally decide to learn about electricity and componants, I bought this kit to start in a fun way: The motor according to the seller is a DC 1.5-...
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76 views

Reverse charge protection for parallel primary lithium cells (CR2450)

First time poster, long time follower here. I am looking into the safety aspect of using primary lithium cells in parallel. The reason behind using parallel cells is to increase overall capacity. In ...

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