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.

Filter by
Sorted by
Tagged with
0
votes
1answer
70 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 And a torroidal rheostat between them. The 3x25R batteries will be in parallel. The rheostat will balance ...
-2
votes
2answers
63 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 ...
1
vote
1answer
63 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 ...
0
votes
1answer
22 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 ...
0
votes
0answers
37 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 ...
0
votes
1answer
63 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 ...
-1
votes
2answers
66 views

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)\$?
0
votes
2answers
125 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 ...
-1
votes
3answers
69 views

What happens when 4 batteries are in series, but with wrong polarity?

I remember that, as a child, we had an electronic game that didn't have a proper ON/OFF button. So someone older in my family used this trick "to power it off": they flipped one of 1.5V AA ...
0
votes
1answer
43 views

How to rewrite this equation?

How can the following equation which represents two series resistors (a & c) in parallel with a third resistor (b) be written in terms of conductance?
1
vote
2answers
65 views

Globe brightness in series circuit

So in a simple DC series circuit, why do some globes shine more brightly than others? And which ones are the brightest? Obviously each consumes a certain amount of voltage but I don't think the ...
1
vote
3answers
93 views

What is equivalent resistance equation in this case?

If we have three resistors (A, B & C) and we know that A is connected in parallel with B and also A is connected in series with C. How can we write the equation of the R equivalent of the three ...
-1
votes
2answers
122 views

I’m an electrical idiot - can you help me?

I have overhead doors at the back of my office building. I wanted to wire up a large red LED next to the light switch so that when employees leave, the light would be red indicating the doors are up. ...
1
vote
0answers
40 views

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 ...
1
vote
3answers
42 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 ...
0
votes
1answer
48 views

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 ...
1
vote
5answers
227 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 ...
0
votes
2answers
46 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 ...
4
votes
2answers
712 views

Reversed DIP Switch

Simple question, why does the LED lights up when the switch is off
6
votes
1answer
135 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 ...
1
vote
1answer
62 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....
5
votes
6answers
1k views

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 ...
1
vote
2answers
114 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 ...
1
vote
3answers
94 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 ...
1
vote
3answers
105 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 ...
0
votes
1answer
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 ...
6
votes
4answers
449 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 ...
0
votes
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:...
1
vote
2answers
50 views

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 ...
1
vote
1answer
43 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 ...
2
votes
2answers
329 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)...
-2
votes
2answers
144 views

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 ...
0
votes
2answers
40 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 ...
4
votes
3answers
486 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?
0
votes
0answers
28 views

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 ...
2
votes
2answers
103 views

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 ...
0
votes
0answers
82 views

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?
0
votes
1answer
50 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, ...
2
votes
4answers
135 views

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 ...
-1
votes
1answer
48 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 ...
0
votes
0answers
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 ...
0
votes
1answer
97 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 ...
0
votes
0answers
44 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 ...
0
votes
1answer
74 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....
0
votes
1answer
49 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 ...
0
votes
1answer
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 ...
1
vote
3answers
52 views

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 ...
1
vote
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 ...
0
votes
0answers
43 views

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 ...
-1
votes
1answer
46 views

simple question on circuits

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

1
2 3 4 5
10