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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How do I deal with this strange inductor?

I'm trying to solve for the equivalent inductance between terminals a and b but there's this 2 Henry inductor on the top right that doesn't fit with the basic rules of series and parallel connections. ...
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Actuator linking alternatives

I am working on a project that requires raising and lowering a static flexible rubber to a max height of 300mm from a zero, flat point. My issue, other than the fact my expertise lies within other ...
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Two 12 V lead-acid batteries unevenly loaded

A contractor installed a battery-powered lift in my house. It contains 3x2 12 V lead-acid batteries (2x12 V in series, 3x24 V in parallel) which are charged in every station of the lift. The lift is ...
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First cell in series connection gets charged first

I have charged ~20 packs of 4S batteries and I noticed that cell connected to + on charge circuit almost always is the one who gets charged first (reaches full voltage). Is this a coincidence or is ...
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TECs: parallel or series? [closed]

My project is regarding the cooling effect of TECs. I am from a mechanical background. My question is: what happens when TECs are connected in series or in parallel? If one configuration is better ...
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Electronics Lab - Not measuring voltage drop across resistor connected in series with capacitor

I'm working on an RC circuits lab for school, and it stated to connect a circuit as follows: 15VAC in series with a 470-ohm resistor and 4.7uF capacitor and measure the voltage drop across the ...
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2 answers
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How do you solve for current or voltage in series circuit when you only have resistance total and P1? [closed]

Total resistance 900 ohm P1 is 48mW Needing I or V to solve the rest of the equation or power total
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Three diodes in series AC detection

Why, in the circuit shown here, would you put three diodes in series with one another instead of using one diode?
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Resistor losses in heat

I am trying to understand the power lost via heat (friction) from a resistor as opposed to what flows through and is available for the next component in series, and how I estimate this. I have read a ...
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What happens when you discharge a capacitor in series with another capacitor?

I have been told that this is a bad situation, so I made a circuit diagram. Unfortunately I am not sure the simulator is going to tell me everything that I need to know. Let's say I have a circuit ...
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Simple switch between 12V and 24V

I hope somebody can help me here. I am helping my son build a 24V race car with his school. We have a speed controller that runs on 24V built by an electronics engineer who is no longer with us. The ...
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If the total resistance of the circuit is 5 Ω, determine the value of R3

So far I have answered question 1a and parts of b. This is my step by step process: 1a) P=IV P = V/R x V P = 20/10 x 20 P = 40 W b) RT = 5, R1 = 10, R2 = 5; R3 = ? let R3 = x RT = 5+10+x 5+10+x = 5 ...
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Series/Parallel Resistor Association

My question is very direct. I understand the definitions and formulas involved in the association of resistors in both series and parallel, but when solving the circuit below, I don't quite understand ...
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Can a voltage stabilizer with an offline UPS give the same performance as an online-UPS? [closed]

I have a 5.5 kVA offline UPS backing up a Bewoulf cluster. It works fine during a complete loss of grid power, but when the grid power flickers the cluster shuts down. Assuming that this is because of ...
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Is it safe to use this arrangement of charging NiMH batteries in series and then using them in parallel

I have built a solar charger that charges 6 AA NiMH rechargeable batteries in series using a constant current source at a little under C/10. That part is fine. I want to use the batteries to power a ...
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Transformers in series: Equal input/output voltage ratings, unequal power ratings

I am learning electronics and needed a negative rail. I have two transformers that have the same rated input/output voltages but different power ratings and manufactured by different companies. ...
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Can batteries be connected in parallel then in series then in parallel again?

I'm planning a modular and swappable battery system where each module is for example 12S2P (2 parallel Li-Ion battery connected in 12S.) Can I connect two 12S2P modules in parallel making it a 12S4P ...
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1 answer
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Identify number of strings in Philips 14.5W LED PCB

Is it possible by just looking at the attached image whether the LEDs are in a single series circuit, or whether they're configured in series/parallel? The image is not great but I tried to highlight ...
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1 answer
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Series and Parallel Capacitors in Circuit Analysis

In the circuit below: I performed my calculations considering: $$\frac1{C_{eq}}=\sum_{k=1}^N C_k^{-1},$$ and $$C_{eq}=\sum_{k=1}^N C_k,$$ when the capacitors are in series and when they are in ...
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Charging only the first battery in a series

I have a series of three 3.7v 600mAh LiIon batteries powering a ca. 12v circuit. Currently, a DPDT switch rewires them into a parallel configuration when I charge them–each battery with its own ...
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Is it safe to connect inputs of two Power modules in series?

I need to convert a 600VAC to 24VDC in the most compact way possible to put on a PCB. Is it a promising idea to connect the inputs of two or three of the following modules in series to achieve it? ...
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What is the reason to connect 4 resistors of the same value as 2s2p? (image)

There are 2 parallel branches, each has 2x 10R resistor. It seems to me that the resulting value will be 10R, but I can't wrap my head around why would someone do this if it is not meant to dissipate ...
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12 V / 24 V power using series & parallel circuit of 12 V batteries. Is this viable?

Is this a viable layout? The 12 V system is for everyday use on a boat. This boat system is 12 V. The charging is to the 12 V system. There is no permanent 24 V system. The 24 V would only be used ...
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Is it possible to share a common 0VDC (negative) between three DC switch mode power supplies - when two of them are in series?

I have a system that needs a 96VDC and 12VDC feed to operate. I have a pair of Meanwell RSP-3000-48 power supplies tied together in parallel to supply 96V and a single Meanwell HLG-240-12 supplying ...
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What is the result of wiring an electrolytic cap in series with a ceramic when parallel was intended?

FINAL UPDATE A reassessment of my power consumption has led me to the solution to all of my problems. I picked up a 5V, 5A power supply (giving me plenty of overhead), reassembled my project, and it ...
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Voltage on connected battery terminals

I have a series connected battery: I would expect there is no voltage on upper terminals, but when I measured there was 0.2V. Terminals are connected with screws and bus bar. I tried tightening the ...
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Laplace Transformation: Determine the current through the inductor versus time i(t)

simulate this circuit – Schematic created using CircuitLab I am trying to find the current through the inductor versus time i(t) using Laplace transform. Converting everything into the s-domain: ...
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What level of imbalance in series connected cells is good?

If I have lithium battery with some cells in series (same type, same manufacturer) - how much could they disbalance after one cycle? How much is too much? If, lets say, I charge 4S pack from 12V to ...
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Wiring isolated split power supplies in series

I'm hoping to get a +/-48V supply out 2 of these PDME1-S5-D24-S +/-24V split power supplies. From what I've read about connecting power supplies in series, it's necessary to have diodes across each of ...
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Driving multiple serially connected laser diodes with GHz arbitrary waveforms

For the purpose of a scientific experiment, I need to illuminate a sample with multiple laser diodes (LD) arranged in a 1D array. I need at least 10 arbitrarily driven LDs but I have AWG with only 2 ...
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How to calculate the value of a resistor with just the total voltage?

It's a series circuit with a total voltage of 20 V. R1: 10 kΩ R2: ? but 6V R3: 5 kΩ Must find R2. How can I get it without the current? simulate this circuit – Schematic created using ...
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Is it okay to assemble Li-ion cells all in line (series and parallel)?

Could there be some practical issues when operating a lithium-ion battery pack that consists of cells all in one line? (for instance, at a +/- series connection, individual cells within the first ...
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Mathematical function a of an integrator in series with a non inverting op amp

I am trying to understand the circuit given below so I can make a mathematical model of it. The circuit consists of an integrator with a reference (offset) voltage and a non inverting op amp ...
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Christmas lights in series with one broken bulb

I read this about Christmas mini-lights in series: "When one bulb's filament breaks, current stops flowing, so the remaining lights go out, and the full 120V appear across the broken filament. ...
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1 answer
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5 level inverter using H-bridge with mosfets

I want to make a 5 level using H-bridge. I have made H-bridge using MOSFETS and it works. My problem comes when adding output of these two H-bridges to get 5 voltage levels. I am adding the outputs ...
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Connecting many LEDs in series on HVDC

Is it technically possible to connect, lets say 500 2V LEDs on 1000V DC line? As far as I understand, the voltage would simply be divided in 500 for each identical LED, right? Is it safe to do that? ...
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Why can't two Kill-A-Watts be put in series to measure 220VAC? [closed]

I had the same question as on this page. Since it wasn't mentioned on that page, I'm assuming that placing two 120VAC Killl-A-Watts in series in order to measure 240VAC will not work. So my question ...
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How to simulate series capacitors in CircuitLab?

I am reading through the book Practical Electronics for Inventors, specifically the section on capacitors. I read that capacitors in series will an have equivalent capacitance C with formula $$ C=(1/...
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Is there anything wrong with this MOSFET switching circuit that disconnects the batteries from the circuit when charging?

I'm trying to teach myself electronics hence my beginner skills in design. I want to design a circuit to power another with two 18650 li-ion batteries in series. Charging them in series seemed like a ...
2 votes
1 answer
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Is it possible to use two DC-DC boost converters in series from separate DC sources?

I was wondering if I could put two DC-DC boost converters in series. Each of these converters is fed from a DC source which is basically a USB charger of 230VAC to 5VDC/1A. The voltage output of these ...
1 vote
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Relays connected in series?

I have 2 identical relays (same specifications) whose working input voltage is 12V DC. Can I connect the 2 relays in series by supplying 24V DC so that there will be 12V DC drop across each of the 2 ...
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Why will clock signals have different phases after a frequency divider?

I have a question about data transport between two chips with series format. I have two chips. Chip 1 will sent 8-bits data to chip 2. The picture shows a solution. I will provide a 100MHz clock from ...
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Two LEDs connected in series don't work

I'm very new to electrical engineering and I ran into a strange issue while trying to connect two LEDs in series today. Both my blue and white LEDs work separately, but when I try to connect them ...
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How do DC solar optimizers work in series?

Tigo and SolarEdge both have solar DC power optimizers. These have MPPT built in and optimize the panel. That is, the panel gis connected to them, then the optimizers are hooked up in series to each ...
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LED in series is not working in Proteus simulation

When I run the Proteus project, all the red LEDs should turn on, but none turn on. You can see that the RA0 is on, and the LEDs series is connected ok. Am I doing something wrong? The complete idea ...
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Is it safe to charge lithium ion batteries that are in series individually? [duplicate]

I have a 3S1P lithium ion battery pack that I'm making. I wanted an easy and convenient way to charge the battery pack, so I was going to add a battery charging IC to the battery pack and charge the ...
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How to calculate the voltage drop across a load connected in series to the secondary coil of a transformer

I need to know how to calculate the voltage drop across a load connected in series to the secondary coil of a transformer. I know the resistance (Rs) and inductance (Ls) of the secondary coil (and ...
1 vote
1 answer
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Parallel-series connection of an odd number of solar cells

I plan on having the following array in my system: Vmpp voltage at max. power point for each cell is 1.67 V Impp current at max. power point is 18.4 mA As the number of cells in the right "...
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1 answer
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neon-indicator-lamp for a bypass switch

Please excuse my schematic. This is a Dim-bulb Tester I am building. This is supposed to protect the device under test (DUT) that I will plugin into "outlet", by limiting the current, "...
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Calculate total resistance. (Circuit analysis)

How do I solve this circuit and determine the total resistance between A and B if all the resistors are 120 Ω? Thank you.

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