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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Calculating parasitic capacitance of serial zener diodes

simulate this circuit – Schematic created using CircuitLab I have 2 series zener diodes like these in the schematic. Their capacitance is C=225pF How do I calculate their equivalent ...
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What happens to charge in a 3-capacitor loop when link between two capacitors is opened and closed?

Initially, charge is shared between Source C1 and the two Co capacitors which make up Ctotal. Once charge is stabilized, the wire link is cut, forming a tiny capacitor Cm in series which is added to C ...
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LED circuit parallel

I have SMD LEDs of 5 watts each having 6500kelvin with 9-12volts forward voltage with 900-1050 mA operating current and 1100lm@500. I have put 3 LEDs in parallel and connected it parallel to my ACxDC ...
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Another question about LEDs in series

I have been doing a lot of reading on trying to match constant current drivers to series of LEDs but either my calculations are incorrect or the demands of what I am proposing are way off the charts. ...
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Connecting multiple series battery holder in parallel of 18650 batteries

I'm pretty new to this, i understand how series and parallel work. Just want to ask if it's safe to connect multiple series battery holder in order for them to be parallel? If my battery are all the ...
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Are these circuits equivalents (caps in parallel with VCC)

I need to put 2 capacitors for decoupling in parallel with the power (5V). In some guide of my project I did found schema "A", in other schema "B". Are both equivalent and in parallel? Or only the ...
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Why doesn't my potentiometer alter LED light intensity?

I have a 1k potentiometer, 1k resistor and an LED in a series circuit being supplied by a 9v battery. The potentiometer doesn't reduce or increase the light of the lED, why? The resistor is not ...
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1answer
110 views

Overheated resistors [closed]

If resistors overheat and melt, like the one in series lights, will it cause fire? I bought a LED Christmas lights. When I plugged in, the resistors started to melt and burn. What happens if I keep ...
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parallel filters vs series filters

So I have been having trouble understanding the difference of Rc filters that have the capacitor in series with the resistance and Rc filters that have the capacitor parallel to the resistance . To ...
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Is there a practical difference to connecting batteries in series or parallel when routed through switched/regulated output?

I'm building a battery pack that will be hooked up to a buck converter for switched output. To increase the pack's mAh capacity, I can hookup a second array of similar cells in parallel to the ...
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Circuit with 10 LEDs with 9V battery

I know that a 9V battery can only power so many LEDs. I need a 9V battery to power 10 of them maybe less or a few more and keep brightness and im not sure where to go to make it happen. Or if i ...
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447 views

Common-mode chokes in series

Is it common practice to combine common mode chokes back-to-back in series to eliminate/reduce RF interference in different frequency bands? As a random example, placing this in series with this in ...
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Extracting phase-shift and gain from a time series information

I have many files consisting input and output voltage signals for a linear filter circuit. For each file the input and output signal is at different constant frequency. All sampled for 2 sec duration ...
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Best configuration for 18650 batteries?

Planning to build a 72V 18650 battery pack with used laptop batteries. I have a few questions to what happens when you have different batteries. What happens to batteries in parallel with different ...
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Should Resistor be before or after an LED series [duplicate]

I am still trying to figure out the very basics of electronics, or certainly the parts I need to know for what I am trying to do. I've got the very basics (when it comes to using LEDs). + is Positive ...
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1answer
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Generating -5V from AAA batteries [closed]

I want to generate -5 Volts from connecting AAA batteries in series, in order to temporarily replace a charge pump suspected of contributing noise to my embedded system. (See this answer (and its ...
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Charging the 18650 battery [closed]

I create a arduino robot car and I used the power bank for the supply of arduino. And I used L293D Motor shield arduino and the supply I used is the 4pcs of 18650 battery, I series the 2 pairs of the ...
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193 views

Charging 4 Li-ion cells in series

I am trying to recover the use of an old cordless drill by replacing the Ni-Cad batteries with Li-ion. I have removed the 10 x 1.2V Ni-Cad cells that were wired in series with 4 x 3.7V 4200mAh high ...
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Do I need individual connections to +5 V for this circuit?

I have the following circuit: See that +5V in the top left corner (ignore the bottom one for now)? It is connected to J, S, J, and S. I know that I can simply grab 4 wires and connect each on to my +...
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2answers
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Why doesn't current increases when the voltage is increased

When connecting two batteries in series the voltage is increased. For example: Connecting two 5V batteries in series will produce 10V voltage but the current will be the same. According to Ohm's Law <...
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812 views

Led lights in parallel to 220v

I want to start a project with led lights, but I am completely new to working with electricity (i have used electricity but have never created something myself). I want to create a led wire with ...
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59 views

Question Regarding Series and Parallel Circuit

Stack Exchange members, I am new to this stack, so please allow any formatting errors. My question is that what is a 'bank' in the following statements: '3 out of 12 resistors in one parallel bank' '...
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How to find the equivalent resistance of this circuit?

I know that finding the equivalent resistance depend on whether resistors are in serie (R1+R2+...+Rn) or parallel (1/Req=1/R1+1/R2+...+1/Rn), but i don't know how to apply that to find the equivalent ...
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201 views

Instantaneous voltage drop acrossed resistors in series

When two resistors with equal resistances are wired in series the voltage across each resistor is equal to half the voltage of the power supply. Is this also the case the instant the power supply is ...
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Benefits of multiple op-amp gain stages in series?

I'm a bit lost in regards to how multiple op-amps in series will perform. My use case would be the amplification of low-voltage audio signals (4-50mVRMS) to roughly 8VRMS. I only found documentation ...
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Correct Series/Parallel 12v SLA Wiring?

Is this an optimum wiring scheme for draining and charging seven 12v SLA batteries of different amp hour ratings wired in series/parallel for 72v 28ah output? (powering a scooters speed controlled 1....
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160 views

Why the resistors needs higher Ampers if the Total current is 4 Ampers?

I have a question about the circuit as shown up. My question is if the total current is 4 Amperes, why do the resistors need a higher current? Am I missing something? If that so, what it is?
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charger in series with light bulbs

I mistakenly connected a power charger in series with my ceiling led lights... oh... whell... the reality is more complex, but essentially: 1) when the switch is off, the phone power charger is in ...
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3answers
119 views

240v Split phase series circuit

I'm sure this has an answer somewhere but I am going to try my luck. I am having trouble with the following type of circuit. 240V ac going to 3 resistors in series @ 10kW (no neutral, this a simple ...
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5answers
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Tool for “designing” a resistor network?

I'm preparing to calibrate some current sensors for a system with DC 13.6V power, and various loads, from well under an amp, up to about 4 amps. I bought some 2, 3 and 5 ohm power resistors, and plan ...
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1answer
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How to charge a 3cell 11.1V battery pack made out of 3 Nokia BL-5C?

I connected three Nokia BL-5C 3.7v 800mAh Li-Ion batteries in series for a robot project resulting in 11.1v @ 800mAh capacity. How do i charge the pack? Should i get a 12v 5A adapter and limit the ...
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Connecting primary of two stepdown transformers in series

My aim is to get 12 volts output from a Stepdown transformer for a circuit I need to construct. Supply voltage at home is 220 volts AC. I can simply use a stepdown transformer available in market. But ...
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Series resistor in data lines

Why is a series resistor used in high speed signal data lines? Is there any reason to include a resistor or simply protection from the receiver end? For example, I'd like to understand the reason ...
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Resistance in series [closed]

Resistance drops current but in series circuit, the current remains same. So what happens when two or more resistors are in series?
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Calculating current in a series circuit

Given the following circuit, it seems like we could use ohms law to conclude that current = voltage / resistance. With a source voltage of 3.3 and a resistance value of 220, current = 3.3 / 220 = .015 ...
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650 views

Solution of current in series RLC circuit for a forcing function

I have a basic conecptual question related to series RLC circuit response Assuming that I have sinusoidal source of the form $$ V_{source}=V_m*sin(\omega*t) $$ The equation for voltages in RLC ...
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peltiers in series

Im trying to understand the way a peltier modules behave as they are new and intriuing to me, I have ordered a few tec1-12705 units from china and done a little research trying to understand it. Some ...
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727 views

A Series-parallel circuit combination with current as input source

I am asked to find: 1.) the voltage drop |V| 2.) Current i1 3.) Current i2 So far I only managed to find the total resistance and total voltage which is 6 ohms and 72 volts respectively. I am really ...
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Capacitor Back to Super Capacitor?

I am attempting to make a smaller coil gun (pistol). I do not have a super capacitor. However, I have about x400, 10v, 2200uF capacitors. Am I able to make a bank of a sort and get the same effect as ...
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Splitting a series voltage to power seperate devices

Good day all, Here is the scenario. I have a 12v device and a 6 volt device I need to power. Can this be safely/efficiently accomplished by using 2x4 AA battery holders and run them in series, ...
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Is this lamp circuit correct?

Given the following circuit... Is this correct? Could D and A be considered parallel? (I'm trying to set up light bulbs A and D in parallel. B and C in series. Thank you very much!
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243 views

Are three SPST switches required to convert two resistors from being in series to being parallel

It's straightforward to construct a part of a circuit that contains three resistors and two SPST switches where changing both switches converts the resistors from being in parallel with each other to ...
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1answer
678 views

LED in Series on 24V line

So I have a simple circuit with a 24VDC input, a 2200ohm resistor, an LED, a solid state relay, and a float switch controlling when the LED (and SSR) are turned on. I'm curious if running the ...
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1answer
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Series Connected Secondary Transformer

I have a multiple-winding transformer with the following configuration: primary: 230V secondary: 2x 10-12-15V frequency: 50Hz power : 66VA current: 2x 2.2A As far as I can understand from its specs ...
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RC Series circuit's voltages

I made this simulation circuit using Proteus. In this I connected a AC source 200V RMS/50Hz. But, sum of capacitor voltage and lamp voltage not equal to given 200V. What is the reason for that? ...
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Resistors In series with voltage divider

just a heads up - i'm a complete beginner, so thanks for your patience in advance :) I'm trying to get an LED light to light up, with 3 resistors in series (with voltage divider). Here's my scheme: ...
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140 views

coils/Inductors in series for power transfer

I have an air core inductor that I want to use for resonant coupling purposes. This inductor has an inductance value of 500nH. Is it ok to connect another inductor with a value of 100uH in series with ...
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859 views

Can I connect two 6V 25W bulbs in series to a 12V supply?

I've two GE 4510 6.4V 25W tractor bulbs with me. Unfortunately, the only power supply I've in my possession is capable of outputting only 12.02V. Can I connect the two lamps in series to the 12V ...
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Is there any pitfall to using resistors in series AND parallel for an LED array?

I've seen a lot on LEDs and series vs parallel resistor usage, but found nothing regarding the combination of both, so here goes. I am working on a watch of sorts, that will work similar to a 7-...
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2answers
214 views

RLC Series circuit V(t) = Vss(t) + Vt(t)

I am having difficulties trying to obtain the voltage expression for the below circuit. When I simulate the circuit, the values obtained from my v(t) expression do not match the simulated circuit ...

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