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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DC/DC MC34063 serial boost converter for increasing voltage

I am trying to build one ultrasonic mist IOT device for this github project. SO in the power supply part it needs to have almost 70V input voltage, so for more Voltage you can use boost converter ...
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3answers
39 views

Calculate the frequency corresponding to a given current or power attenuation in an LRC circuit

For a series LRC circuit, I'm trying to calculate the frequency corresponding to a given current (or power) attenuation to either side of the resonance frequency peak according to the formula for ...
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Understanding LED chain systems

There are several LED light chain systems on the market, like the Konstsmide 31V system or various traders' "System Decor" or "System 24". All seem rather similar, but there are no ...
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5answers
159 views

Finding current through LEDs in series-parallel circuit

I'm stuck confirming that the current pulled in a circuit will be 15mA. If I have hypothetical LEDs that pull 15mA each from 1.8V, and they are put in parallel (I know this is not a good idea, but ...
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45 views

Basic Series/Parallel connection understanding

I am just starting out with electronics and I have understood that there is something fundemental I just cant seem to figure out about parallel and series connections. I am having a lot of trouble ...
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693 views

Reversed DIP Switch

Simple question, why does the LED lights up when the switch is off
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132 views

Simple question about the difference between Thevenin resistance and non-Thevenin resistance

In a lecture for an Electrical Engineering course I was taking, the professor did an example on solving a Thevenin circuit. When he solves the circuit for Thevenin resistance he adds two resistors in ...
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1answer
61 views

Diodes-practical analysis

Need to find VR1 and VR2 in the circuit when: A) D1: forward D2: forward B) D1: reverse D2: forward C) D1: forward D2: reverse D) D1: reverse D2: reverse. Show calculations. E=9v R1=10kohms R2= 4....
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Is it possible for series connected battery cells to provide different currents?

I know current through series elements is always the same. I was wondering if the same is true for series supplies (batteries) or if it is possible for one supply to provide more or less current than ...
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2answers
93 views

The effect of connect batteries in parallel/series on C rating

If I have two identical batteries (capacity:300mAh Voltage=7.4v C rating=25C) is I connect those two batteries in parallel or in series does this effect the C rating of the combination of the 2 ...
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3answers
81 views

6 x TEC1-12706 in series cannot reach desired amperage, why?

]I have 6 EC1-12706 in series connected to a variable DC Power Supply (rated with maximum 30V and 10A). I set the power supply to 30V and 1.50A. My problem is that the DC Power Supply when the output ...
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3answers
93 views

Buildint series voltage regulator using transistor and zener diode

I am a new to the electrical engineering and currently trying to calculate the series voltage regulator for raspberry pi at maximum current draw. Raspberry Pi works at 5 volts and 2.5 amperes at ...
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48 views

Can I power and use 1 small voltmeter for 3 12v batteries in series?

I asked this question for 4 voltmeters before, and received some great feedback. Unfortunately, it generated too much heat. This is the design I'm thinking of implementing now, but I want to make sure ...
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447 views

Can I power and use 4 small voltmeters for 3 12v batteries in series?

I bought some small voltmeters hoping I could use them with my kid's Razor dirt bike. The bike uses 3 12v lead-acid batteries in series to provide 36 volts to the motor. Ideally, I'd like to use the ...
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2answers
49 views

Can two batteries be connected both in series and parallel using an isolated 1:1 DC/DC converter?

I have two 7.4V batteries. I want to use the series 14.8V voltage to drive a load but I also want to use them paralleled to drive a lower-voltage load. So would it be possible to connect an isolated 1:...
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Can a DC CC power supply be used for current limiting in a circuit with a battery in series

In circuit #1 I showed typical adjustable power supply usage it can limit voltage and current, all good. It got me thinking. Let's say due to some reasons I can't replace battery with a power supply ...
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1answer
37 views

Cascading Isolated Power Supply

I want to implement a few chips for battery management and due to the ADCs of each cell working at bigger voltages each, and each chip(I have to cascade thre ICs LTC6803-4) with a maximum voltage ...
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310 views

A large resistor in series (parallel) with a small resistor has the resistance of the larger (smaller) one, roughly?

I am currently studying the textbook The Art of Electronics, third edition, by Horowitz and Hill. Chapter 1.2 Voltage, current, and resistance says the following: A large resistor in series (parallel)...
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Calculate voltage and amp drop of resistance

How do i calculate the voltage and amperage drop from resistance on a DC series circuit? I know ohm's law and all, but I’m doubting how much of actually applies to this equation, since i know the ...
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32 views

Series connection of transmission lines described by telegrapher's equations

My issue concern the definition of series connection of multiple transmission lines described by the so called constant parameter model, to be next simulated in EMTP-RV. Let us take as an example two ...
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3answers
403 views

Q factor of rlc series circuit

What is significance of Q factor in series rlc circuit? , and why rlc series circuits with larger Q factor values are considered better? What is idea behind introducing this term?
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Identifying bad LED in series configuration

I have a panel of LEDs. They are arranged in sets of three. Some have burned out, and I can easily find the offending LED with a voltmeter. But some of them are only on the verge of failing - when the ...
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What causes the electric field to change over series resistors?

So for example if we have a a wider and a narrower wire of the same length in series, since v1A1=v2A2, in the narrower wire the charges will move with a greater velocity. Since v is proportional to ...
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connecting c10 battery with c20 battery

Has anyone connected a c10 battery with a c20 battery in parallel or series. Will this work? What are the problems of connecting 2 batteries with different c ratings to the same inverter?
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47 views

Super simple: Convention for connecting batteries in series to load

Super simple question. I am new to electronics and have to connect 4 12V lead-acid batteries in series. Once I connect the negative terminals of each battery to the positive terminals of the others, ...
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4answers
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How do capacitors in series work?

If capacitors are connected in series with a vltg source, then how would each plates get the polarity? For a single capacitor, the electrons from one plate are pumped by the source towards the other ...
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1answer
47 views

What protective device can be used to avoid no-load operation in a dc series motor? [closed]

I think there must be some relay or converter which automatically shuts the machine on no load condition. ( Just Guessing ) The following para is a quora answer which I am not sure is correct, please ...
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29 views

Charging three lead acid batteries in parallel with a single 14V charger

I need a 36V battery for a project of mine. Eventually I will buy a li-ion pack but now when prototyping and testing I don't want to spend a lot of money so I'm looking at cheap alternatives. I'm ...
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89 views

Can I “sum” internal ADC channels to achieve extra bits resolution?

First of all I am a newbie in electronics. I am building some weight scale applications using (as seen everywhere) load cells wired to a HX711 ADC and a ESP8266. I am now giving a try to the Texas ...
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42 views

Batteries in series capacity considerations

Let´s say I have a 2 AA 1,5V 1000mAh Alkaline battery cells in series. The circuit it´s connected to consumes 500mA, works at 3V and it´s powered on always, and taking into account other electrical ...
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73 views

Two power supplies with different current in series

Does the schematic in the picture work with these powersupplies from China? Both are rated with 5V but one with 20 amperes and the other with 2 amperes. https://www.aliexpress.com/item/33042313383....
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How do I achieve speed reduction in a DC series motor by adding resistance? (calculation)

So i'm hoping someone can look over my answer as i'm sceptical it's right. I used a shunt calculation for this series question as I've honestly no clue how else to do it; Calculate the size of an ...
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43 views

Is it possible to drive a power piezoelectric in lower frequency than its own frequency?

I am driving a piezo transducer simply by an inductor series with piezo. the resonant frequency of the piezo is about 40KHz and I designed a 20KHz transducer. I'm giving a pulse voltage (using a class ...
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55 views

Is there an optimal configuration or any way in which I can effectively connect

I currently have a 72V e-bike. The configuration of the batteries directly from manufacturer is 6 12v 20AH valve regulated lead acid batteries connected in series. In taking the limiter harness out ...
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Connecting two DC converter's inputs in series

I know it won't work, but I want to make sure I have the right explanation why it won't work. Given are two devices which have a build in converter (I have this digital voltmeter in mind). They need ...
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1answer
76 views

What is the correct way to solve this problem?

I first solved it by converting the two star connected networks into delta networks and further solving them. Then I solved by considering one star, converted that to delta and then used parallel ...
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What is the best battery topology for my inverter-charger application?

Background: I have a Magnum Energy MSH3012RV 3kw inverter-charger that runs on 12VDC and I'd like to be able to discharge around 250 to 300 AH between recharges (from 120VAC input) without the ...
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simple question on circuits

This is a simple question on impedance and i just need to make sure i know the correct answer
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5answers
173 views

Does decrease in voltage decreases the speed of electrons in a series circuit?

Let's say we have a 5V battery and a ohmic conductor that consumes energy connected in a series circuit with constant resistance. When we increase the voltage, the number of electrons flow through a ...
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58 views

CMOS inverter in series

I have the circuit below. Now my question is: why the rise time and fall time measured on Vout are the same as in a circuit using only one inverter gate? I know the propagation delay is the sum of ...
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65 views

Component connected in series in a block diagram of a control system

I am given the following block diagram of a control system (I think it also applies to electrical circuits as well with linear components. Correct me if I'm wrong). My textbook says that C(s) is ...
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53 views

Do I choose a series or parallel battery set up to power a fish finder?

I plan on running a Garmin UHD 73SV fish finder off two 12V 7A lead acid batteries for a kayak. The unit pulls 1.25Ah. So if I run them in parallel I will have 12v 14A with a run time of about 11.2 ...
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102 views

Is this network of resistors in series and parallel, the way I intended?

https://www.circuitlab.com/circuit/gu5zh6pdvj8q/parallel-and-series-question-circuit/ simulate this circuit – Schematic created using CircuitLab Do these circuit schematics accurately ...
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118 views

What happens when you put two rectifiers in series to get DC from a stepper motor?

For a project a stepper motor is used as a generator because of the decent amount of power at low RPM. Now have found that one rectifier is sufficient when placing the coils in series. First however, ...
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3answers
461 views

Center-tap transformer current calculation

I have a transformer with two secondaries, one is 24 V / 500 mA and the other is 12 V / 200 mA. I want to wire them in series to make a center-tap transformer: simulate this circuit – Schematic ...
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2answers
103 views

isolated DC-DC converter in series

I am still unsure about connecting two DC-DC converters to achieve a higher output voltage. Regarding my question about this DCDC converter. The answer I selected does not work when no load is ...
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Connect two mobile power banks in series

I have two 20.000 mAh mobile power banks with two USB ports that can deliver 5V at 2.4A. I need a minimum of 9V at 2A in output. I have 2 male USB connector cables and I want to connect the negative ...
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88 views

Torchlight LEDs in series, is this possible?

I recently got hold of 2 broken LED torchlights and I had the idea of putting the LED heads together (after I cut them off) in series to make 2 lights for a camping powerbox that I want to make (LEDs ...
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Simple Filter and RLC Circuit Pointer

If someone could push me in a decent / reasonable direction it would be much appreciated! I do a HNC part time on electrical / electronic engineering and with how busy I have been at work I feel I ...
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Expert advice needed on electric bike battery setup

I'm currently building an electric bike for a competition. I know I want a 15s lithium ion NCM battery (max 4.2 volts/cell), but don't have a battery management system or a balance charger than can ...

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