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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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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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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How I connect my solar panels with a solar inverter? [migrated]

I have six solar panels with a voltage of 37.4V, with 17.39A and seven solar panels of voltage 42.8V with 11.69A. My solar inverter supports a maximum voltage of 500V and maximum current 100A. I just ...
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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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5 answers
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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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3 answers
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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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2 votes
3 answers
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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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2 answers
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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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1 vote
1 answer
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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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2 votes
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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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1 vote
1 answer
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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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1 answer
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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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2 answers
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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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2 answers
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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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3 answers
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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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2 votes
1 answer
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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 ...
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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 ...
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1 vote
2 answers
106 views

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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8 votes
2 answers
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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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-1 votes
1 answer
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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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0 votes
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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 ...
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1 vote
1 answer
229 views

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 vote
1 answer
90 views

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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-2 votes
1 answer
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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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-1 votes
2 answers
119 views

How to get +- 400 volt DC from two sources?

I tried two rectifiers in series. From 230V AC I get on each rectifier 207V DC. If I linked them in series + to - it seems to me that the direct current flows into the AC supply. How can I configure ...
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0 votes
2 answers
64 views

Can we connect two mobile batteries in series or parallel

I have two mobile batteries, one with 3.7v 1500mah and other is 3.7v 1300mah. I am using a DPDT switch to switch the two batteries in series and parallel. I use in parallel mode (3.7v) to charge the ...
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-4 votes
1 answer
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Quick equivalent resistance question [closed]

I have an equivalent resistance question. Is it possible to find the equivalent resistance of this circuit? I would like an explanation on how one could go about breaking this circuit down further to ...
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1 answer
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Solar MPPT, 24v deep-cycle battery wiring (Parallel and Series combined)

I'm asking here in case any of you can offer some insight, I have 4 x 110AH 12v Leisure deep-cycle lead-acid batteries; wires in series and parallel to bring the array voltage to 24v. I have 200w PV (...
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2 answers
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How does the current get distributed in a Serial-Parallel battery pack?

I was following a tutorial that tries to emulate the voltage drop in a battery pack with cells in parallel and series (in a 6s2p connection). The pack looks like this: Let's say that one applies 20A ...
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2 votes
2 answers
110 views

How to design a parallel-able lab power supply?

I want to design a power module that can be configured in series or parallel if the power sources are isolated. The problem is I don't know how to implant master/slave function, at first I was ...
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3 votes
2 answers
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Calculate Total resistance in the Circuit

So am trying to find the total resistance in the circuit and potential difference, and new to electronics and not sure if am doing this correctly ,any hlp would be great. Voltage source set to U=24v (...
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0 votes
0 answers
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How to charge 8S battery pack with two 4S BMS circuits?

I recently made 8S battery pack out of 18650 cells (4.2V each) and I am worried about connecting it to BMS. Some time ago I asked what BMS should I get (well, I asked if i have to have some BMS at all ...
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1 vote
3 answers
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Resistors both in series and in parallel?

Consider this circuit. I'm assuming that the resistors have the same resistance. The same amount of current flows through them so they must be in series. But the voltage across each resistor is also ...
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-1 votes
1 answer
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If I convert the AC from a transformer to DC using 4 diodes and one capacitor and the same for another transformer and connect those DC out in series?

If I convert the AC from a transformer to DC using 4 diodes and one capacitor and I do it for another transformer and connect those DC out in series, what will happen? Is there any problem? How much ...
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0 votes
2 answers
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50 amp hour and 100 amp hour lifepo4 batteries in series

I have four 12 V, 50 amp hour lifepo4 batteries running in series, so 48 V. I need to increase the capacity of the battery bank. Can I get four 100 12 V amp hour batteries and create 4 sets of 150 amp ...
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1 vote
4 answers
468 views

Running LEDs on AC power with a series capacitor

I have been experimenting with replacing the lighting with LEDs. Recently I tried a new arrangement. I sanded the envelopes of two white LEDs such that when glued together to form a single 5 mm LED ...
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If I connect three different capacity lithium batteries in series with a 3S BMS board, When the BMS will stop giving output?

If three different capacity batteries are connected in series with a 3S BMS board, when the lowest capacity battery runs out and under voltage occurs of the battery then will the BMS continue giving ...
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How do I determine the S-matrix for a combined series and shunt capacitors circuit?

I need to compute the S-parameters for the following two-port circuit, with combined series and shunt capacitors. simulate this circuit – Schematic created using CircuitLab I have tried ...
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0 votes
1 answer
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Calculating total resistance

How do we calculate the total resistance from A to B R1||(R2+R3) but the same can be said for R2 so how does it work? simulate this circuit – Schematic created using CircuitLab
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0 votes
3 answers
138 views

Resistors in series to increase maximum Voltage

Do the values of resistors matter when I want to use them in series to increase the maximum voltage they can handle? So can I just use a 1 megohm resistor for example that's rated for 200 V and then ...
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