Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [parallel]

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

6
votes
2answers
2k views

Two parallel wires with no resistance - why it's wrong?

I've built the scheme below in circuit simulator and it didn't work because of "wire loop" mistake. Why it's wrong? Why it's wrong physically? The simulator is falstad.com/circuit
0
votes
2answers
30 views

Lower wattage of IR bulbs permanently

I have two 90w/12v infrared IR bulbs which is put into a r7s sockets. From thes socket goes in total four wires which is connected to our power supply. We have set two of the wires in serial so they ...
5
votes
3answers
2k views

Is it true that on a modern processor, parallelism is possible on a single core?

Final Edit: I just realized that when use the word "parallelism", it's almost parallelism==ILP, I originally thought even a single instruction could be divided into ...
0
votes
1answer
44 views

How does distance between parallel batteries affect voltage drop/required wire thickness?

I'm looking to wire up an off-grid system. What I'm stuck on is battery placement. The likelihood is my batteries will need to be quite far apart (almost 2 metres). My question is how does this ...
0
votes
0answers
30 views

Parallel DC sources with varying voltages

I have different DC sources which i want to hook up to a 24v battery pack. - Solar controller output - AC/DC charger - truck alternator Can i connect these in parallel? I've been told that because ...
1
vote
3answers
62 views

Parallel Capacitors

I have a power supply with two output capacitors in parallel. 16v 2700uf. Theoretically, couldn't they be replaced with one 16v or higher 5400uf or do they form some kind of quasi LC circuit via the ...
0
votes
4answers
87 views

Could we theoretically massively increase number of parallel computations (for some problems) by getting rid of cpu clocking?

CPU clocking involves making sure that each operation or part of an operation takes exactly a certain amount of time (the machine cycle time). One way to increase the efficiency of a cpu is by ...
0
votes
1answer
59 views

Auto Fuse Tap Parallel or Series

Am looking to use a fuse tap to run a dash cam. These are instructions https://www.lumision.com/wp-content/uploads/2015/09/Micro2-Fuse-Tap-Instructions-e1441486778366.jpg for a fuse tap and consistent ...
0
votes
1answer
21 views

In Parallel resonance circuit mentioned below, is current equal for Resistor and Inductor?

The parallel capacitor will have current leading voltage by 90°. In the case of Resistor and Inductor (which are in series with each other but they both are parallel to capacitor). Now, the upper half ...
0
votes
0answers
33 views

Parallel Path in DC Machine

I am not able to perceive the concept of Parallel Paths in DC Machines. What does it really mean and how can I visualize or imagine it. I know A=P in Lap Winding and A=2 in Wave Windings. But what is ...
0
votes
1answer
33 views

Series or parallel tank circuit?

The secondary of a transformer with a cap connected across it - should it be considered as a parallel tank circuit or a series one? It looks like parallel, but in reality the voltage rises on it when ...
1
vote
1answer
47 views

Using B0505 for connecting phone chargers in parallel

I am planning to charge four 18650 Li ion batteries that are connected to four TP4056 in parallel making 4 amps in total to charge them in their usual rate. I was thinking of connecting two 2 amp ...
1
vote
0answers
36 views

Parallel MOSFET Circuit Analysis

I'm solving part b of this question I started with the assumption that both MOSFETs were in saturation mode to simplify calculations, I then solved for the circuit, tested the assumption using vds, ...
0
votes
3answers
42 views

Total curent through two parallel resistors

voltage source- 5V This simulator shows that the curent in the left wire will be 10A, like sum of curents through two parallel resistors. Is it wrong?
0
votes
2answers
84 views

Question about hooking up two generators in parallel

So I read this question: Hooking two (gasoline) generators together to make 220VAC And it’s close to what I’m wanting to do but not quite. We had a power outage due to weather. I purchased a ...
-2
votes
0answers
61 views

At the high level of abstraction, does the choice between ASIC, FPGA or microcontroller matters?

I am new at hardware design, and my goal is to be able to implement a circuit. To start, I don't go farther than the 2nd level of abstraction, but I am supposed to write both the behavioural and ...
0
votes
3answers
98 views

What exactly are low speed devices? [closed]

The definition of I2C is - "A multi-master multi-slave serial bus used for communication between low-speed devices". However, I have been searching the web for a concrete explanation for this but ...
0
votes
1answer
50 views

how to wire together multiple photoresistors to make one big sensor?

I'm using an esp32 dev board, and a bunch of 5v laser diode emitters pointed an equal number of photocell resistors across a plane. The goal is only to detect when any two or more beams break at the ...
1
vote
0answers
39 views

Sharing power between components in a Arduino circut

I am trying to power both an ultrasound sensor (HC-05) and an infrared sensor (FC-51) from Arduino's 5V pin, connected in parallel. The circuit is very primitive. When connected separately, both ...
2
votes
2answers
71 views

Parametric Equalizer with State Variable Filter

I'm new to this forum but hope to get some answers to a project I'm working on. I'm trying to build an parametric equalizer with several bands (5 Bass-Bands, 3 Middle-Bands, 3 High-Bands). In the ...
1
vote
1answer
89 views

MOSFETs in parallel for DC : two MOSFET altenatively ON/OFF to simulate DC?

In a previous question about using MOSFETs in parallel in DC operation to increase current, it was pointed out that MOSFETs do not like to be used in DC. It got me quite some headake to understand ...
1
vote
2answers
329 views

Impossible to find the energy stored in an inductor without resistance and given a constant DC current source?

Here's my circuit: simulate this circuit – Schematic created using CircuitLab After doing some series and parallel inductor combining I get the value $$L_{eq}=20.8 mH$$ My question is, how ...
3
votes
2answers
1k views

Parallel MOSFETs to get more current (40A adjustable current source)

In my previous question about an adjustable constant current source, I was advised to use an Op-Amp and a MOSFET to generate a current source that I could adjust with a variable input voltage. The ...
2
votes
0answers
41 views

Finding voltage across capacitor in series and parallel

Here's my circuit: simulate this circuit – Schematic created using CircuitLab I want to find the voltage over the 20uF capacitor; however, what I come up with is 50V which does not seem ...
0
votes
1answer
95 views

Parallel 18650 battery pack voltage not stepping-up with Boost converter. Why?

I'm new here and I hope this is the right place to ask! I have assembled a 6P 18650 battery pack out using Samsung 25R cells, soldered altogether with Nickel strips, effectively giving me 3.7V 15Ah. ...
0
votes
2answers
64 views

Connect 3 Lithium Polymer battery with different capacity in parallel [closed]

I am working on an IoT product with has a total current requirement of 1.3 A at the peak. Due to space constraint, we decided to select Li-Po battery with capacities one with 600 mAh other two with ...
1
vote
1answer
58 views

Elements' order in a circuit

I was reading about source transformations and came across an example where there was a change in the order of two series elements, is this always possible? The same for in parallel elements but that ...
0
votes
3answers
60 views

One resistor in series and two in parallel for LEDs

So I've read that using one resistor to limit current to two or more LED's in parallel is bad practice, so I wondered what about this kind of circuit: Is this also bad practice? Each LED has it's ...
0
votes
0answers
40 views

Charging multiple batteries with TP4056 witht battery protection

I've searched the archives but none seemed to be similar to my situation. So based on my poorly drawn diagram, all batteries will be in parallel. I will be using TP4056 with protection and was ...
-2
votes
1answer
410 views

Difference between Full Adder, Parallel Adder and Ripple Carry Adder?

I am a student and i cannot find any prominent difference between the full adder, parallel adder and ripple carry adder. The full adder for n-bit number requires n full adder cascaded, so as the ...
0
votes
2answers
74 views

Struggling with Thevenin Equivalent Problem

I had asked this question before and thought I had found the help I needed, but unfortunately I found myself unable to solve the problem fully when I attempted it. The problem: For the Thevenin ...
5
votes
1answer
437 views

Replacing two LEDs with a 2-pin, bicolor LED, using a circuit that reverses polarity based on two inputs

I'm working with a commercially available circuit that can optionally be configured to disable its internal LEDs and use two external LEDs. This post discusses the use of external LEDs. One LED or the ...
0
votes
3answers
288 views

Connecting multiple Fairy lights in parallel to single power source

The above diagram shows how I'm about the connect the LEDs, info regarding the drop forward voltage been taken from: Calculating forward voltage for a string of fairy lights: multimeter shows "1&...
0
votes
2answers
73 views

how to control power within a triangle automatically

I have two mains powered extract fans with sensor operated controllers. I need to add a third extract fan that will run if either or both of the other two are on. How do I wire this so to prevent ...
1
vote
4answers
158 views

What is the Gain, Input and Output Impedence in this circuit?

So I'm trying to know what the input, output impedence and gain is in this circuit To begin, I'm kind of confused since I don't know if those two resistors at the right are in series or in parallel.
0
votes
0answers
85 views

transfer function of RC in parallel

I was looking at RC in parallel (at the bottom of the page at the link) to understand the transfer function \$\frac{V_{out}}{I_{in}} = \frac{R}{1+SRC}\$, in the case that the input is a constant ...
1
vote
1answer
312 views

Can I safely parallel 2 separate 18650-based Li-Ion battery packs, each with their own BMS? [closed]

I have a couple of 18650-based 10S2P 36V nominal 4.4Ahr Li-Ion battery packs from my electric skateboard which I'd like to permanently put in parallel to double my range and improve my power during ...
0
votes
1answer
100 views

Voltage of Different Voltage Sources in Parallel with Diodes

I am working on a project in which I will have two different power sources, which I will have to dynamically switch between to supply power to devices. These two power sources will likely be similar ...
1
vote
2answers
202 views

Do I need to fuse batteries in parallel?

I have two deep cycle batteries in my Airstream, in the panel there is a fused bus bar (that appears to be faulty) so the solar panels only charge the one battery. Can I just run a heavy gauge wire ...
0
votes
3answers
70 views

One potentiometer supplying two effect units

How can i do this? I want a simple expression pedal splitter where one expression pedal can be used to control two effects units. I don't want to setup a additional powersupply or digital ...
0
votes
1answer
62 views

Can parallel addition of a bigger capacitor damage the smaller one?

I have connected big capacitors to the speakers to increase the bass. Now, after months of using, I notice that one of the speakers sounds 2x low. I ejected those big capacitors, still the same. I don'...
0
votes
1answer
67 views

10 Lamps setup 220v ac, would it be safe?

I am not an electrical engineering or anything, I am just a curious person trying things at my home for fun. I want to setup a lamp system for my sister's mirror where I would need to use 10 lamps ...
1
vote
3answers
98 views

What value of C should be added in parallel to make the circuit appear purely resistive?

I'm currently working through Cogdell's Foundations of Electrical Circuits and came across problem 4.39 d) as shown below: Earlier in the question I found the frequency-to-be-used as 43.3x10^3 rad/s. ...
0
votes
0answers
65 views

Are pull-up resistors mandatory for inputs on modern parallel ports?

Here I go again testing more circuits on two computers with each reporting completely different data yet I feed the same data in. Now this time, the data coming back is all logic highs on my laptop ...
0
votes
0answers
64 views

Passing data to 48 Independant SPI slaves

48 separate SPI busses that can run at 30 MHz... but I probably only need 100 Khz, since I just need them to update at a rate of 1Khz... However! I would like to have them run as fast as possible. I ...
2
votes
1answer
99 views

Why is this pair of electric brakes not working in series (as intended), but works in parallel?

My uncle has a 48V electric boom lift that sat for awhile and we're trying to get up and running again. We had a lot of stuff replaced and refurbished and we're almost there, but there's one last ...
1
vote
1answer
167 views

Parallel connecting USB power for higher currents [duplicate]

I am trying to find any way in which I can have a higher power output from a USB power bank, by combining multiple USB ports in parallel. The USB power bank has 3 outputs, one rated at 2.1A and the ...
0
votes
0answers
32 views

How to model parallel dc-dc converters (transient analysis)

I would like to simulate two dc-dc converters in parallel using my own c++ algorithm. At the moment I have created averaged state-space equations for both converters, but struggle to get my head ...
0
votes
1answer
121 views

Capacitors in parallel with Voltage Source

Why can't capacitors be connected in parallel with ideal voltage source. In various questions involving it we were asked to ignore the capacitors, by our teachers without valid explanations.
0
votes
2answers
48 views

saftey wiring lipo's in series and parallel

I want to make sure I am being as safe as possible. I have 2 18650's wired in parallel and 3 of those pairs wired in series with a 3 cell BMS board. I also have a constant current driver at 700 mA ...