Questions tagged [parallel]

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

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What happens to current in a Parallel Circuit

I am wondering what are the affects to current in a parallel circuit and if the current can be run in parallel in the same way as with voltage (eg. To power 3 phones in Parallel would I need 3 times ...
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2answers
286 views

A large resistor in series (parallel) with a small resistor has the resistance of the larger (smaller) one, roughly?

I am currently studying the textbook The Art of Electronics, third edition, by Horowitz and Hill. Chapter 1.2 Voltage, current, and resistance says the following: A large resistor in series (parallel)...
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133 views

Charging lead acid batteries in parallel? [closed]

I recently got my hands on eight 12V 9AH lead acid batteries. Could I simply place them in parallel and charge them with a battery tender without any special measures? Are there any risks involved? ...
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How does wiring two LNAs in parallel affect charactaristic impedance?

It appears that wiring amplifiers in parallel improves the signal to noise ratio. I thought I would experiment with two SAV-541+ LNAs in parallel and see how they perform: How does wiring an LNA in ...
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Circuit breaker tripping in relay scenario. Not sure why

I have a partially failed pool control system that has lost its digital timer circuit ( can't purchase the parts ). Disabled the pool pump on/off timer, and added an external 24hr on/off timer w/ 2 ...
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1answer
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Connecting multiple DC sources in parallel without the use of diodes

Obviously to have more current is there a way to somehow connect multiple DC sources together not by using trivial series Schottky diodes, but using mosfets and LDO(Low dropout) circuits? To somehow ...
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45 views

Given a fixed area on a solar panel, at what point does adding cells in parallel not increase voltage?

Given a fixed space on a solar panel, all else equal, adding multiple cells in series increases the voltage (while current remains the same). For example, two cells equals 0.5v + 0.5v = 1v total ...
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Is there a difference in voltage/current between a solar panel with 36 individual cells or one big cell?

When wiring solar cells in parallel, the current is additive but the voltage remains the same. On the other hand, when wiring solar cells in series the voltage is additive, but the current remains the ...
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connecting c10 battery with c20 battery

Has anyone connected a c10 battery with a c20 battery in parallel or series. Will this work? What are the problems of connecting 2 batteries with different c ratings to the same inverter?
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Speaker wired in parallel & connecting to stereo amplifier [closed]

I just bought two 2-way in-ceiling speakers (Yamaha NS-IC800). Each of them is rated at 8 ohms. I wired them in parallel (so it's 4 ohms in total): The amplifier I will be using is Nobsound NS-20G ...
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Can One hook up several displays on the same RGB parallel interface?

I am working with a 800*480 24-bit parallel RGB LCD display. The required clock for the RGB interface has to be between 23 and 27 MHz (typ. 25 MHz). For testing purposes, I need to display "...
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1answer
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Beef up inverter by adding more mosfets?

I have a 120 V, 500 W halogen work light that needs more power than my inverter can handle. It is one of those generic 120 W continuous power inverters you find in those jump starter multi tools. ...
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1answer
51 views

Dissimilar Vector Group Transformers fed from 2 dissimilar phased sources of power

A bit of a debate among'st my peers about utilizing paralleling generators with dissimilar vector group transformers. The theory goes as such: Generator A will be energizing the LV side of a Yd11 4160:...
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55 views

Help with powering LEDs in parallel with maximum brightness

I'm pretty new to engineering stuff and I'm scared that I may burn out my LEDs if left to my own devices (literally.) I'm trying to power 16-18 LEDs in parallel at maximum brightness. I have a surplus ...
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35 views

Finding a current on a RL circuit

I'm studying all by myself, I'm not taking any courses or majoring at something. Last year I had a question about an RL circuit that's been annoying me for a while. Now I'm at home doing nothing but ...
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How is capacity calculated when adding a battery in parallel with a faded or damaged one?

I was intrigued by the answer and comments on this question about connecting a second battery in parallel to increase capacity. The original battery has obviously lost capacity and is nearing its end ...
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Parallel Resonance circuit Q factor formula Clarification

I'm confused with the formula of Q factor in parallel resonance because in other books its different is it okay to be like this ? A. This is from the Electronics Tutorial Website A. This is from a ...
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29 views

Adding Parallel Diodes to a load

This question is based on my previous question - Measuring voltage drop across a diode in a switched circuit I have started a bounty on that question. At the same time, I am trying to understand why ...
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1answer
27 views

What type of problem occurs when paralleing two MOSFETS with the same frequency and Phase?

While using two transistors in parallel for the high current ratings. What type of problem does occur and what are the possible remedies? Does placing inductor in source of both transistors is also a ...
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61 views

What is a good way to do parallel spice simulation?

I'm doing a project that needs quite an amount of circuit simulations. I have access to computing clusters but have no idea how to do spice simulations in parallel (or maybe if I find a way to run ...
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1answer
62 views

Wire Two 12v Batteries Together in Parallel With Solar Panel and Raspberry Pi

Please excuse my circuit below. I am a high school robotics teacher, self taught in electronics, so I may have used some incorrect symbols and configurations. I have a Raspberry Pi 3 that has a ...
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3answers
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Got 2 gang light switch, common load, design circuit to know ON/OFF state of switches on each wire

Goal is to be able to use standard wall 2 gang light switch to: a) provide line connection with either of two / both hot wires coming from the same 230VAC phase to the ceiling for AC-DC 48V PSU ...
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2answers
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Designing a parallel, rechargeable circuit out of 18650s

as my title says, I would like to design a rechargeable circuit made out of 18650s in parallel. I understand that placing batteries in parallel isn't ideal, so my question is: If I utilize same ...
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1answer
76 views

What is the correct way to solve this problem?

I first solved it by converting the two star connected networks into delta networks and further solving them. Then I solved by considering one star, converted that to delta and then used parallel ...
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What is the best battery topology for my inverter-charger application?

Background: I have a Magnum Energy MSH3012RV 3kw inverter-charger that runs on 12VDC and I'd like to be able to discharge around 250 to 300 AH between recharges (from 120VAC input) without the ...
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61 views

Mulitple switches connected to one pull-up resistor vs separate resistor for each

I have 16 SPDT switches to be used as the address inputs to a UM61512A 64Kx8 CMOS static RAM module. I have designed the circuit to have separate 10k pull-up resistors to +5v when each switch is up ...
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How to combine high voltage and high current source? [closed]

Can whimshurst machine (high voltage and low current) and homopolar generator (high current and low voltage) be connected in parallel to draw high watts? Please explain the process & flow of ...
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29 views

supercapacitor regenerative braking question

I am doing a heavy vehicle project and putting a regenerative braking system into the vehicle. It also has a supercapacitor module in parallel with the battery (which has the same voltage), and the ...
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1answer
74 views

Fuse detection in a lithium Battery Parallel connection

I really need your help in order to figure out a solution to detect a blow fuse in a 16S parallel connection. The issue is: Despite a fuse has been blow the voltage at the other side of the fuse is ...
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1answer
41 views

Do I choose a series or parallel battery set up to power a fish finder?

I plan on running a Garmin UHD 73SV fish finder off two 12V 7A lead acid batteries for a kayak. The unit pulls 1.25Ah. So if I run them in parallel I will have 12v 14A with a run time of about 11.2 ...
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Is this network of resistors in series and parallel, the way I intended?

https://www.circuitlab.com/circuit/gu5zh6pdvj8q/parallel-and-series-question-circuit/ simulate this circuit – Schematic created using CircuitLab Do these circuit schematics accurately ...
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Will running a tab between the positive terminals interfere with a 4S BMS?

I have 3 12V, 64AH battery packs with a 50A MPPT solar charge controller and 3 50A balancing boards. The rest is theory because I'm still waiting for components to arrive but... Normally, the ...
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3answers
81 views

Replace ONE 25v 47uf capacitor with FIVE 60v 10uf capacitors parallel?

MY 1000 Watt True Sine Power Inverter blew a 25V 47uf capacitor. The shell was rattling around inside, and the ribbons were exposed. Yay, I found the problem! Sooooo, how can I tell the mounting ...
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70 views

Connecting power supply outputs in parallel [duplicate]

I would like to know if it is safe to connect in parallel the outputs of a power supply like this, and in case it is feasable, how to proceed.
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1answer
91 views

Connecting a parallel LCD using ST7789 with STM32H743VI

I have a STM32H743VI that I want to connect to a LCD display that uses ST7789 with parallel interface (8 or 16 bit), the LCD doesn't have the SPI signals so I have to use the parallel interface. I am ...
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1answer
82 views

What happens: n Hall effect sensors wired in parallel, < n of them is triggered?

This is almost certainly a noob-level question. I only have one Hall effect sensor to play around with so I can't test this out for myself. Say I have multiple Hall effect sensors wired like this, ...
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1answer
64 views

Equivalent drawing of a parallel basic circuit

I have the following circuit in Everycircuit: Ignoring the component values, when I try plotting this in a network graph, I get something like this: Are these two circuits identical? I suppose the ...
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3answers
76 views

Different 'connection types' between components

Is there a name for the different types of connections between components? For example in the following: Point A is connected between two components -- a battery and resistor -- and so is in series. ...
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1answer
61 views

What happens when two different voltages are connected to a car battery

I have purchase a battery charger solution that has a two part system. I am having a few problems with it which has led me to realise that the unit supplies two different voltages to the battery at ...
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2answers
119 views

How to solve a LED-resistor parallel with a resistor?

Hi there I am curious as to how you would solve this circuit to know voltage drops and currents. It came about from a previous question I had asked which showed my understanding was not quite what I ...
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2answers
124 views

Confirmation on Diode in parallel with a Resistor

In a circuit with a resistor parallel to a diode/resistor, will the voltage across both resistors be the supply minus the 2v drop of the LED? Meaning you would calculate it still by using resistors ...
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2answers
176 views

Why does LED dim when adding second LED in parallel with a single resistor

If I have a led hooked up to a 12v DC supply with a single resistor it runs nicely as you would expect. If I add a second LED in parallel the brightness drops, slightly, the brightness on both is (to ...
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81 views

Is this circuit wired in parallel?

Sorry for the amateurish question. I am planning to tap into my car battery's reverse fuse to signal when it's time to receive a wireless signal from a rear-view camera. The camera-feed receiver in my ...
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71 views

Latching relays connected in parallel not working as expected

I have a project I'm working on where I need 4 relays to open when power is applied to the board and close when power is lost. I need to use latching relays to conserve power as the device could be ...
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3answers
104 views

Accessing structures concurrently modified by ISR

I have the the following situation: An STM32L476RG (ARM Cortex M4F @ 80MHz, 1MB Flash, 128kB RAM) parses some string data coming in over UART. The project uses mbed-os. The parsing of the data is done ...
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1answer
218 views

How to wire several 78XX series regulators?

I have a 30V power source and I need to get several different voltages from it using linear regulator. 24V for op amps, 12V for relays and 5V for MCU. They all going to be installed on a heatsink. If ...
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65 views

Switching several relays at the same time parallel with one or several transistors?

I need to switch 2 or maybe 3 or 4 relais at the same time. Is it best to have for each relay a separate transistor? Or is it perfectly fine to use just one transistor and one diode for several ...
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1answer
97 views

Question about 74LS164 8-bit serial in parallel out shift register

With the 74LS164 8 bit parallel out serial shift registers, I'm confused about a few things. In the datasheet (page3) on the logic diagram why do they suggest using an active low inverter before the ...
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1answer
60 views

Can I connect an inverter supply and AC mains supply in parallel? [closed]

Consider a solar panel is used to charge a battery and the battery supply is fed to an inverter. When the mains AC supply goes off then the backup battery supply kicks in. Suppose I want to reduce my ...
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1answer
97 views

Current sharing parallel power supplies

Recently, I purchased two 48v 25A power supplies. I want to put them both in parallel. In reality, each PSU consists of 2 smaller individual units(see picture), so 4 units in total. Pin 8 of that ...

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