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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1answer
58 views

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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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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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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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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1answer
36 views

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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2answers
51 views

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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2answers
96 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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2answers
83 views

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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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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3answers
108 views

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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1answer
152 views

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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2answers
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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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4answers
148 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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0answers
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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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0answers
30 views

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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1answer
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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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3answers
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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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1answer
58 views

What is the charge flow between a charged capacitor and an uncharged capacitor connected in series

What will be the charge on both the plated after bc is closed? (Imagine that both the C1=C2=C)
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1answer
60 views

Crystal frequencies

the context is that I am working on project which uses a 32 768 Hz quartz oscillator used for a uC. My questions are: I have read that series resistance should be low (25 to 100 Ohm) otherwise it can ...
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2answers
63 views

2 dc-dc converters in series? [closed]

I have 2 of theses converters. I am trying to get 48v. Can I connect the outputs in series to achieve this?
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1answer
30 views

RCL circuit sum

Just need help in the daigram of this sum. Can't understand the daigram.will a common resistance be shared between capacitor and inductor or is there 2 resistor and 1 capacitor and inductor with ...
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3answers
54 views

Balance charge unknown number of LiPos in series

This exact question has already been asked here, but no answer was given so I'm reposting it. I want to charge an unknown number (between 1 and 8) of 1s LiPos in series with my balance charger (ISDT ...
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2answers
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Why is Vs 36 Volts?

Stumped by this seemingly simple circuit. Why is the voltage across the current source 36 volts and not 24 volts? Please explain step by step if possible, thanks. (I solved it with an MIT circuit ...
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1answer
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Speaker connections [closed]

Hello and good day to all. I have a McIntosh C2500 preamp. Also 2 Klipsch 8 ohm speakers and 2 Elac 8 ohm speakers. My question is what is best wiring connection for them to this McIntosh pre amp. ...
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2answers
63 views

Does my total power supply voltage need to equal the sum of the voltages in my circuit in series?

If I have let’s say, 4 bulbs, each rated at 1.5 volts and they’re all connected in series. Would my battery need to be rated 6 volts? My logic is that each bulb would have a voltage drop of 1.5 volts ...
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Two phone batteries connected in series not working

I have two, fully charged, 3.7V standard Nokia phone batteries, that I want to connect together to use as a 7.4V battery, I connected the (+) of one to the (-) of the other, and then tested it but it ...
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How are this voltage source and resistor (separated from each other by a capacitor) re-imagined as a resistive voltage source?

I'm trying to implement a wave digital filter from this research paper: Emulation of Operational Amplifiers and Diodes in Audio Distortion Circuits R. C. D. de Paiva, S. D Angelo, J. Pakarinen, and V. ...
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1answer
60 views

Calculating resistance in theory

I'm studying about calculating the Equivelant Resistance in some circuits and I haven't figure out how to calculate this one I thought the way to go was to do ...
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1answer
36 views

How does series parallel combination of LEDs affect the temperature rise?

I was designing the LED light of 200 W with LED combination of 9 series / 8 parallel, each LED is 6V thus total output voltage is 56V. I am using Meanwell xlg 200 W driver. But this resulted in high ...
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45 views

About the 32-bit divider

I am currently working on a hardware design, its function is to realize the Taylor series of cosh. In it, I need to use a multiplier and a divider. They are both 32-bit input and 64-bit output. I ...
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0answers
37 views

Trouble understanding the LM555 schematic for 50% duty cycle oscillator mode

I am working with a LM555CN and I am trying to have it run in astable mode and make a LED blink. In essence I am trying to follow along with this video. Now, there is a part in the chip instructions ...
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1answer
92 views

In practice, does the order of a series RLC-shunt circuit matter?

In simulation I'm finding that the image pictured below works well to optimize a complex impedance match. I know that Z = ZL + ZC + R, so in theory the order shouldn't matter---but in practice, with ...
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1answer
55 views

Connecting two PSUs in series and parallel

So I have 2 identical 1W DC-DC converters (9V -> +/-5V). The converters are isolated to 6kV. The exact part is: XP IHA0109D05. If I connect both (using the same battery for each one) in parallel ...
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2answers
109 views

I have 2 12v batteries wired in series to get 24v. Can I add the third battery to one of the other two in parallell?

Is this something that is possible? Is it a good idea? I would then have double the amp hours on one "set" of the batteries in series. All batteries are the same brand and type.
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1answer
55 views

What is the best way to connect different LEDs?

I'm working on my first PCB for horticulture lighting and wondering what is the best way to connect all LEDs. The idea is to use both white LEDs (using Samsung's LM301H LEDs that require 2.75V@65mA ...
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1answer
73 views

Why would a multimeter (ammeter) connected in series prevent the instrumented device from powering on?

I'm trying to measure the current used by a 3.5" hard drive in an external enclosure. I connected my multimeter in series with the positive 12V power supply, but in doing so, the hard drive ...
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2answers
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5 LEDs work in parallel but not in series. Why exactly?

I've been learning electronics very thoroughly for the past couple of weeks. I'm running experiments on LED circuits at the moment and there is one thing that is completely beyond my comprehension. I'...
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1answer
37 views

Calculating maximum series/parallel configurations for unique resistors

Say I have 4 unique resistors. How would I calculate all the possible unique series and parallel configurations and thus, calculate all the possible total resistances? And how can I expand this to ...
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1answer
67 views

Dev Noob - Can I use two output pins from an ESP32 to get a voltage of 7.2?

I have an ESP32 and I would like to get an output voltage of more than 3.6 from its pins. Would activating them at the same time and connecting them putting them in series make the voltage rise to 7.2 ...
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0answers
33 views

Solar charging "12" volt nimh battery pack

So, I have 3 parallel 8-battery packs of nimh batteries wired in series - a total of 24 AA batteries. One battery is 1300 mah so I assume this should give me a total of 3900 mah. This gives me 9.6 ...
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3answers
65 views

Connecting batteries in parallel to the existing batteries that are connected in series

I have 6 12V batteries all the same volt and same amp. I need 48V to use and I connected 4 batteries in series to get the 48V, but two extra batteries are just laying there doing nothing. I thought of ...
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2answers
106 views

Wiring 2P2S battery pack

I have 4 18650 batteries and I want to make a battery pack of it. If all the batteries were new and had similar voltage/capacity I could easily charge them all together in parallel with my charger. ...
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3answers
104 views

Can I safely balance a series/parallel cell circuit to power a 12V soldering iron?

I want to power a 12V soldering iron with 2x 21700 '40T'batteries and 3x 18650 '25R' batteries with a torroidal rheostat between them. The 3x25R batteries will be in parallel. The rheostat will ...
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2answers
87 views

Achieve 6.6V DC using 2 or more ESP32 output pins in series?

I need to use the ESP32 to trigger a SPDT relay. The output of a single pin is insufficient to surpass the relay's threshold. Can I combine multiple pins to achieve greater voltage? This ...
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1answer
66 views

Christmas LED lights connections

I have several Christmas lights with different AC adapters. First case In the label of one of them, I read: Primary: 220-240 V ~ 50/60 Hz Secondary: 31 V DC 3.6 W ...
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1answer
53 views

15v from 20pin and/or 24pin ATX Power Supply. Connecting PSU circuits in series

I have a portable 12v car battery charger, jumper, maintainer, and inverter with integrated USB ports, 12v car adapter slot, jumper clamps, emergency LED light, and a 3 prong 110v/60hz wall outlet. It ...
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0answers
39 views

MOSFET N-channel as switches in an AND gate

I thought I could use two BS170 transistors working as switches in series, to create logical AND functionality. My circuit is switching an LED with 1.5V of forward voltage and 10mA current set by a ...
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1answer
67 views

Connecting capacitors in series after charging them

Assume I have two identical capacitors and charged both equally. If I measure C1 with a voltmeter, I read 5V, and C2 reads 5V. If I connect the positive leg of C1 to the negative leg of C2 (connect in ...
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2answers
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Can you help me understand this equivalent resistance problem?

It is said that \$R_{th} = 12 \parallel (2+8+10)\$. Why isn't it \$ 8 \parallel (12+2+10)\$?
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128 views

Powering LEDs in a container farm

Container farms take a lot of light. Powering it is not cheap. And I have spent a lot of time pondering the different possibilities. I've developed a PCB to control 4 x 300watt PWM amplifiers. This ...

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