Questions tagged [parallel]

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

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25 views

Cause of delay in CAN

I am dealing with a differential drive robot that interacts with several motors and actuators, all through a powerful NVIDIA Jetson Xavier. The Jetson runs Ubuntu and I use Python3 for programming all ...
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1answer
55 views

Why is the sum of resistances different?

For the following circuit, I found the total resistance with the following equation: However, the solution calculated the resistances in the left and right portion of the circuit in summation with ...
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1answer
31 views

Signal Integrity with Parallel Switch Control

Please excuse what is likely to be a very basic question, but I am an ME, and this stuff is somewhat magic to me. First, I'll provide a minimal, generic question, and then, for those interested, I'll ...
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2answers
52 views

Measuring parallel resistor without current

I am trying to read the temperature sensor in a car with a Raspberry Pi. The temperature sensor's resistance changes as the engine temp increases however the temperature sensor would be in parallel to ...
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1answer
44 views

Understanding LED chain systems

There are several LED light chain systems on the market, like the Konstsmide 31V system or various traders' "System Decor" or "System 24". All seem rather similar, but there are no ...
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2answers
79 views

Time constant of parallel RC circuit

I have read about Series RC Circuit and have understood the Time constant concept. Wikipedia states - "It is the time required to charge the capacitor, through the resistor, from an initial ...
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5answers
156 views

Finding current through LEDs in series-parallel circuit

I'm stuck confirming that the current pulled in a circuit will be 15mA. If I have hypothetical LEDs that pull 15mA each from 1.8V, and they are put in parallel (I know this is not a good idea, but ...
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693 views

Reversed DIP Switch

Simple question, why does the LED lights up when the switch is off
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1answer
132 views

Simple question about the difference between Thevenin resistance and non-Thevenin resistance

In a lecture for an Electrical Engineering course I was taking, the professor did an example on solving a Thevenin circuit. When he solves the circuit for Thevenin resistance he adds two resistors in ...
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1answer
61 views

Diodes-practical analysis

Need to find VR1 and VR2 in the circuit when: A) D1: forward D2: forward B) D1: reverse D2: forward C) D1: forward D2: reverse D) D1: reverse D2: reverse. Show calculations. E=9v R1=10kohms R2= 4....
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1answer
45 views

Which output terminals to use in parallel connection

I have four batteries connected in parallel, I have seen diagrams showing where the output terminals are both coming off of the last battery and the parallel connection. I've also seen ones where the ...
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2answers
93 views

The effect of connect batteries in parallel/series on C rating

If I have two identical batteries (capacity:300mAh Voltage=7.4v C rating=25C) is I connect those two batteries in parallel or in series does this effect the C rating of the combination of the 2 ...
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1answer
60 views

Parallel MOSFETs in saturation/active region

Am I right that when MOSFETs are connected in parallel for them to share the current equally (See Parallel MOSFETs) they have to be operated in the triode region? I have an electronic load with 3 ...
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1answer
36 views

A parallel RL circuit being energized by a sinusoidal a.c. voltage of \$v=100\sin(1000t+36°)\$. Find total current in RMS value

The question is as follows: \$\bullet\$In my book it is done as: \$\begin{align}\\ i_R &=\frac{V_m}{R}\sin(1000t+36°)\\ &=10\sin(1000t+36°)A\\ &=10\cos(1000t-54°)....(a)\\ \end{align}\\\$ ...
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69 views

Correct Way to connect 5 car batteries in parallel

My RV (which I bought used) came with 3 Deep Cycle Marine batteries in Parallel. A previous owner added wiring inside the coach for 2 more batteries, but they were not there when I purchased the coach....
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2answers
49 views

Can two batteries be connected both in series and parallel using an isolated 1:1 DC/DC converter?

I have two 7.4V batteries. I want to use the series 14.8V voltage to drive a load but I also want to use them paralleled to drive a lower-voltage load. So would it be possible to connect an isolated 1:...
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3answers
92 views

Calculation of parallel resistors

I am following calculating resistors video lesson and stuck on trying to understand how combining of: 1/Rp=(R2/R1R2) + (R1/R1R2) to ...
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47 views

Connecting 3 LEDs to a parallel circuit of 3 fans

I am new to circuit building. I am building a parallel circuit with 3 fans for a laptop cooler, 2 of them are rated 12 V / 0.09 A and one of them 12 V / 0.16 A. I ignore the PWM functionality of the ...
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20 views

Placement of gate source pull-down resistor for parallel MOSFETs for BLDC motor

I am working through various Application Notes for driving parallel MOSFETs for a BLDC motor controller. The addition of individual gate resistors \$R_G\$ means the gate-source pull-down resistor \$R_{...
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1answer
22 views

Reading isolated multichannel input with voltage drop on all channels

I am building a circuit to read atleast 22 input channels (24 vdc) using an Arduino board which essentially works on 3.3 vdc or 5 vdc. My current setup makes use of 22 PC817 optocoupler. I am sharing ...
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2answers
49 views

How many amps between batteries that are wired in parallel?

How many amps will flow through the cables between my batteries if I have 2 batteries wired in parallel? Let's look at a simple example: We've got 2 batteries in parallel, and one 12v lamp that ...
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0answers
32 views

Battery Charger in Parallel with System Load Current Sharing - Power Path Control

Currently, I'm building a project which can either run connected over USB or via a battery. The project itself switches between either high current draw at around 450mA or low current draw at 50mA. ...
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1answer
71 views

What happens to current in a Parallel Circuit [duplicate]

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
310 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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3answers
185 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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1answer
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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
50 views

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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27 views

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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47 views

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
48 views

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
53 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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1answer
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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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2answers
46 views

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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1answer
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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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1answer
32 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
28 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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111 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
63 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
105 views

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
52 views

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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42 views

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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3answers
79 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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2answers
89 views

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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31 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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