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Questions tagged [series]

In the case of an electronic circuit, series refers to components connected in such a way that current must pass through each in a single path.

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Stove element as a resistor

I am wanting to use an inverter based TIG welder as a constant current power source for anodizing aluminum. The main hurdle I suspect I will be facing is that the amperage of the welder may be ...
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2k views

Heat lost in ideal capacitor charging

If we use an ideal capacitor to charge another ideal capacitor, my intuition tells me no heat is generated since capacitors are just storage elements. It shouldn't consume energy. But in order to ...
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Can 2 light bulbs of 120V in series be used on 230V AC? [migrated]

I'm considering to buy full spectrum incandescent bulbs in the US, to be used here in Europe. Here these types of bulbs are rare, since it's mostly LED these days. First I thought I needed to step ...
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104 views

Capacitor circuit simplification

I am unsure if I have simplified this circuit correctly, therefore I am unsure how to write Vo in terms of V1. Please let me know if I have simplified this correctly.
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Resistors in series and parallel conundrum

Three resistors of some resistance (ohms) are put in series and the measured total resistance is 24 ohm. Now, if the same three resistors are connected in parallel to each other and the total ...
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123 views

Is there a way to bypass a component in series in a circuit if that component fails?

Imagine a couple of speakers connected in series. Could there be a way to build such circuit with the ability to close the circuit if one component isn't working anymore? Like a different path that ...
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62 views

LED series-parallel and parallel-series combination circuit

I'm designing some LED strips to use to grow plants along a long wall. There will be hundreds of LEDs run by a constant-current high quality LED driver (Meanwell brand or similar). All the commercial ...
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1answer
58 views

Series connection of capacitors

I have some questions for the series connection of capacitors. It would be great if someone could help me get these. What will happen for the below cases when you have 2 capacitors in series and 2 ...
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1answer
23 views

Electron transfer and thermal efficiency in series vs single battery?

If you have 10 batteries in series all generating 5W, does every battery in the series have the same temperature as a single battery drawing 5W? I have trouble visualizing how the electrons travel ...
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93 views

Thevenins Theorem

Can someone please help, I'm struggling with this circuit. I don't quite understand what I need to do, mainly with whats series and parallel. My tutor is not helpfull in the slightest! He' only given ...
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8 views

Series + Parallel Custom Lipo Cell Charging Options

I have a custom LiPo cell, made up of 8x 11.1V 2200 mAh 30C bats. They are wired in pairs in series, and then all four ensuing sets are connected in parallel, to form a 22.2V 8800 mAh battery. I am ...
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68 views

Possibilities for 24v Solar charging of 12v batteries in series and parallel with different Ah capacities

I have two 12 volt 200Ah lead acid batteries and two 12 volt 150 Ah lead-acid batteries. I have a 24 volt 50 Amp charge controller connected to a 150 watt PV panel (overkill for now, but ready for ...
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145 views

Resistor network - how do I reduce this?

How do I find the value of this resistor network. Is the 10 ohm resistor in parallel with the 20 ohm resistor? Is the 16 ohm resistor in parallel with the 5 and 20 ohm resistors in series? I can't ...
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43 views

How to find the effective resistance across the points A and B here?

I had to draw the circuit and take a picture of it as I am not very educated with circuit drawing software. The circuit consists of 5 resistors with their respective resistances written beside them. ...
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3answers
50 views

Resistor in series needed with LED string?

I have an adjustable 24VDC power supply. I have 1W LEDs that I was planning on stringing 7 or 8 in series to get approximately 24V across all of them together. They are rated 3.3-3.8V each. Do I need ...
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99 views

If the order of any component is altered in a series circuit, will the total voltage be affected?

I recently posed this question to someone. I always thought that the answer was simply no because of Kirchhoff's voltage law... However, their response was... "no, the voltage is not altered due to ...
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Series RL Circuit Transient Analysis

I have worked through a question and I am unsure if my answer is correct. It is a series RL circuit with a switch that closes at t=0, supplied by a dc source, which I am trying to derive an expression ...
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1answer
67 views

How do I combine 3 batteries in series and parallel with different outputs?

I'm looking to combine the 2 circuits shown in the picture below using a switch.(ON-OFF-ON) I would like to keep the 12V output seperate from the 24V output. This is to maximize efficiency when using ...
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1answer
47 views

Realizing 2 Resistors are in series in an RC circuit

I understand that when the switch is open, the capacitor acts like an open circuit & therefore the current in the capacitor branch would be equal to 0. When I solved the circuit using nodal ...
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1answer
30 views

Considering power loss in a simple series connection due to cable

A friend and I are struggling on a simple electricity exercise: A heater is connected to a \$U = 230V\$ power network over a copper cable. The cable has a cross-section of \$A = 1.5mm^{2}\$ and a ...
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2answers
101 views

Connecting the primaries of two 110V transformers in series across 220V

I have 2 identical 110V primary transformers (plug packs but with a small transformer inside) for charging batteries in a pair of US made walkie talkies. Only issue is where I live now is 220V mains. ...
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2answers
59 views

Series voltage reference unstable with a series resistor

I am using the MAX6035 as a 5V reference that draws 5mA load current. To protect the input from transient spikes, I thought a simple resistor and zener diode circuit would work well. I noticed that ...
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117 views

Problem with adding two counters in series on an FPGA

I am using Verilog in Lattice Diamond IDE with a lattice MachXO2 7000HE breakout board. I built a basic counter with a limit input which generates a variable period clock output. It works fine on its ...
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1answer
528 views

Current Transformers (CT's) wired in series for two meters or relays

I'm looking for a wiring diagram for the connection of two energy meters (or an energy meter and protection relay) in series to one set of 3 phase CT's, I've heard it can be done, is it S1 on the 1st ...
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1answer
28 views

Series voltage and voltage tester module

I have a question about battery tester module. I have in my hands a board that shows the capacity of a 3.7V 18650 LiPo, presumably by measuring voltage. It has 4 LEDs on it. If I hook this up to ...
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1answer
56 views

Series circuit LED controlled by Arduino schematic question

I'm currently making a project with multiple series circuits to PWM control multiple LEDs. I have figured out how to make it work with a transistor, however I was curious if this way would work as ...
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1answer
169 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 ...
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41 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 ...
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2answers
381 views

Charging two 18650 batteries in series with a 5V USB wall charger?

I'm looking for a good and space-saving solution to charge two 18650 batteries in series. The project is a small boombox, using an amplifier board that works with voltages between 4.5V to 25V. The ...
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1answer
99 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 ...
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2answers
401 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 ...
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0answers
548 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 ...
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185 views

Using relay contacts in series to switch DC loads

We are using relay DRM570110LT and We need to switch 3A @220VDC in the output when we have a DC load. As the datasheet for this relay says, the rated switching current is 5 A, but I've been told this ...
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1answer
66 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 ...
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3answers
83 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 ...
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1answer
154 views

Leds in series with buzzer without resistor

So I'm pretty new at this, so I'm sorry for any dumb questions/statements. I'm trying to build a puzzle box where you activate a circuit with a reed switch using a hidden magnet. Activating this ...
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519 views

Can I use 1N4148 diodes instead of a 1N4001 diode for reducing the speed of a 5V 1.8W fan?

Looking at this 1N4148 datasheet, it seems that the forward continuous current is 0.3A, thus 300 mA. So if I add two in series, I will get 600 mA. I want to use diodes to reduce a 5V 1.8W fan speed. ...
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2answers
86 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 ...
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1answer
76 views

How can batteries be in series?

If a battery looks like this: And a battery series looks like this: How is it possible for electrons to go from the positive side of one battery to the negative side of another battery and then ...
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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 ...
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2answers
76 views

How to split up voltages

I want to power up bluetooth receiver module (input voltage 3.7) and audio amplifier module which accepts only 2.4 - 3.7 voltage, exceeding which already burnt the IC. So i got new one. I'm having 2 x ...
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4answers
164 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.
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101 views

Wiring up a current limiting resistor with an IR LED burns of the LED

I have a 5V DC supply and i am trying to wire an IR led with a resistor in series to it. I have wired it up to a bread board as shown in the pic The current limiting resistor value is ~ 216 Ohm. ...
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1answer
95 views

Doubt with current across several resistors (serie) and Resistor Power Rating

I have read that the current that flows across a circuit of several elements connected in serie is always the same but, as far as I understand, resistors consume current and disipates it in form of ...
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1answer
100 views

Can I sum up multiple, alternating series capacitors and resistors like this?

When the components are between each other, can I sum up multiple, alternating series capacitors and resistors like this? Thanks.
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1answer
62 views

Neglecting certain elements in deriving the current of a series RLC circuit

The current at resonance in a series RLC circuit is described in the bottom derivation, along with it being plugged into the formula for finding the voltage across the inductor in the circuitw: I ...
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1answer
276 views

Converting DC to AC power supply [closed]

I have a simple wiring question. I want to convert a LED light that uses 2 AA batteries, to AC power supply. I have 3 of these lights. I'm assuming each light uses 3V for a total of 9V. I have a 9V ...
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1answer
51 views

Why or when does battery capacity matter in a series circuit?

I have 3 sets of doubled 18650 cells from a laptop battery, and I gather that it can be dangerous to use cells of different capacities in series. This question is more about the theory than practice. ...
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1answer
315 views

What is the miminum voltage for series NiMH pack?

Suppose a pack of 8 AA NiMH cells are serially attached and its known NiMH cells should not go below 900mV per cell. Does this really mean the pack should not be discharged past 7.2v?
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High voltage input and low voltage capacitor in series safety

I’m working with a car battery that has a voltage drop when cranking the engine. As a result of this, the stereo restarts even though it was running already. To resolve the issue of stereo rebooting ...