More than one of a thing, performing the same task simultaneously

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1answer
47 views

Help wiring multiple different colored LED lights

I am working on a project right now, and it is the first time that I have worked with wiring anything. I have 70 LED lights. 10 red, 10 orange, 10 yellow, 10 green, 10 blue, 10 purple, and 10 pink. I ...
1
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1answer
51 views

30x Incandescent light bulb in parallel ? + dimming

I'm trying to connect 30x small incandescent light bulb in parallel (1.5v / 300mA). But I'm having some issue designing the supply and dimming circuit. Does it just work like LED's for the ...
1
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1answer
40 views

Voltage Output of a Current Source in Parallel and in Series with a resistor

Hi All, I imagine this is a pretty basic question to ask but I'm struggling to get my head around this. I'm trying to find \$V_{out}\$ of the circuit above. Now I understand why \$V_{out}\$ can be ...
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0answers
33 views

Dc Motor drive setup

I would like to ask why in this setup the dc motor is parallel to the fet and what is the reason for the diode. Thank you!
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2answers
171 views

Finding the transfer function of this RC circuit

I have the following circuit and I need to find the transfer function: simulate this circuit – Schematic created using CircuitLab Considering the position of \$V_{\text{out}}\$, it looks ...
0
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1answer
45 views

Difference between a series circuit or parallel circuit in power generation?

I wanted to know the difference between the induced-EMF and current, in a series circuit layout, vs a parallel circuit layout. In a series the current would stay the same,however, the induced-EMF ...
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2answers
57 views

9x 1W LED's parallel + series resistor calculation help needed

I am struggling with the calculations of the current limiting resistor for my circuit so I wanna ask you guys for help. I've tried doing this calculations on online calculators and by myself with math ...
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0answers
48 views

Increasing output voltage, by inducing an EMF

I have a concept and wanted to verify it's possibility. I would like to induce and EMF that would increase the output voltage, but putting one of the wires in a parallel sub-circuit in a changing ...
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1answer
67 views

Figuring out the voltage at a point?

From the following diagram: simulate this circuit – Schematic created using CircuitLab What would the voltage be at point b? 5V? And for point a would be 10V? Likewise point a(10V) ...
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4answers
119 views

Are these resistors in parallel

There are 2 groups of resistors that look like they might be parallel, but in between them that's making me question if they actually are. The circuit looks like this: If they are considered ...
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0answers
52 views

induced EMF to a parallel circuit?

What would happen if a wire within a parallel circuit was placed inside a changing magnetic flux, and there is induced EMF, what would happen to the overall circuit? The voltage at point a is 20V ...
2
votes
2answers
72 views

2 LED Parallel circuit help?

I need to make a circuit with 2 leds, 1 green 1 red. If the current flows, green led will light up, if there is a break in the circuit (open circuit) it will light up another led as red. I don't ...
4
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1answer
67 views

Recommended Layout for Parallel Current Sensing Resistors

I'm working with 12V DC systems and high currents (up to ~40A). In order to meet the wattage and price requirements for my design, I'm using two parallel sense resistors. The IC I'm using for sensing ...
2
votes
4answers
240 views

How many LiFePO4 cells can be in parallel?

How many lithium iron phosphate (LiFePO4) can safely be connected in parallel, in order to achieve higher power output (and capacity)? Wired directly together, without components such as resistors or ...
5
votes
3answers
586 views

Meandering traces necessary for 24-Bit parallel RGB LCD interface?

I am working on a project that interfaces an Atmel SAMA5D3 MCU with a LCD TFT display. The interface between both is 24-Bit parallel RGB with HSYNC and VSYNC signals. The resolution of the display is ...
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1answer
67 views

Parallel circuit and Ohms law

Theoretical questions with ideal components.(R2 is 10 Ohm) 1) parallel circuit. R1 and ammeter, If I have a parallel circuit of 2 resistances, both zero Ohm, the current would split to 2 and each ...
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1answer
38 views

Multiple DTMF circuits able to detect the pressed keys but fails to read caller's number!

This is a follow-up question of "Multiple DTMF circuit interfaced to one microcontroller, will it work? Multiple DTMF circuit interfaced to one microcontroller, will it work? I used the ...
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2answers
58 views

Connecting resistor in LED parallel circuit

I connect 3 LED in parallel with a two AA battery source 1.2V each. As i searched in the web i realized that it is not correct to connect them without a resistor as they may get damaged. How mane ...
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1answer
43 views

Creating two branches with similar current using capacitors/resistors

I am studying for my midterm practical and I am stuck on a basic question. Below is a circuit that will help explain (made in Multisim). So, we are given this basic structure. All components must ...
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1answer
87 views

Transistor amplifier circuits

What is the ac collector resistance for the transistor Q1? I am having trouble finding which resistors are in parallel with each other in the circuit above. I want to find the voltage gain and power ...
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1answer
103 views

using double powersupplies

I have 2 computers (home PC's). Both are connected to the internet through a router/switch. The router is always powered, regardless when one (or both PC's) are going standby. Idea is, to power the ...
3
votes
3answers
157 views

Why can't you divide a series + parallel circuit into branches to get total current?

Suppose we have a circuit like this where \$R_1 = R_2 = R_3 = 1\$ simulate this circuit – Schematic created using CircuitLab Why can we not divide this into two branches, \$ B_1, B_2 \$ ...
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3answers
69 views

connect series of batteries in parallel?

I have eight sealed lead–acid batteries connected to my photovoltaic array in the way you can see in the image below. A friend told me, that it was a bad idea to put those light-green cables in the ...
0
votes
1answer
50 views

Series vs parallel for microphones (electric guitars)

I want to create a passive "mixer", with which I can connect two of my guitars to one amplifier, so basically one with two 6,3" input jacks and one for output. For passives without a transformer as ...
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3answers
160 views

Parallel RLC Step Response with Voltage Source

I am learning about RLC circuits in my Circuits Analysis class and I had a question regarding Parallel RLC step responses. In the book, they only provide examples of RLC circuits with a current ...
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2answers
81 views

How does wiring resistors in series and parallel affect their errors?

In an experiment I am conducting, I am trying to measure low currents by wiring a radio device in series with a small-resistance resistor setup, composed of 9 of 1 ohm +/- 5% resistors in series and ...
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1answer
64 views

Adding phasers in a parallel circuit problem

Below is a practice question that I am having trouble progressing further with. The (abbreviated) question and progress as follows: A circuit of 90V's supply is in parallel with two branches. Branch ...
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3answers
100 views

How Do Batteries Behave In Series-Parallel (Verify)

Hi I am confused about How batteries behave in series and parallel. I read online and saw that as you stack more batteries in series, the voltage adds together and the mA's stay the same, and if you ...
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0answers
80 views

Concerns About Solar Charging Tree House Lights

I'm Building a lighting system for my tree house with 4 LED work lights I picked up at the hardware store. I want it to have solar charging and be operable via one switch. Theres alot of background so ...
2
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0answers
145 views

how to parallel mosfet

i want to build induction furnace i parallel 16 power mosfet(irfp460) 8 fet for high side and 8 fet for low side for half bridge i use ir2104s and bd139 and bd140 totem pole for drive mosfet. like ...
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3answers
188 views

Simplifying Series/ Parallel RC circuit

I was doing some exercises on transfer functions and ran into this RC Circuit. I thought that I was allowed to add up the two resistors since they are in series. Which makes that the voltage across ...
0
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1answer
79 views

Issue replacing 27C256 ROM with 62256 RAM

I'm trying to replace a 27c256 ROM with a 62256 RAM, to be able to easily change the memory content. I thought this would be pretty straight forward. Not quite, it seems. I made an simple ...
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6answers
714 views

Single LED connected in parallel to conducting wire does not light up

LED connected in series to resistor. All is well. This doesn't work. Neither does this. This would be the schematic diagram. simulate this circuit – Schematic created using ...
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3answers
217 views

Does running parallel circuits for LEDs decrease their output?

Sorry if the questions here are elementary but my electrical knowledge is limited. I am planning to build an aquarium light fixture and I am having trouble grasping how to best use a driver. The ...
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2answers
113 views

Multiple DTMF circuit interfaced to one microcontroller, will it work?

I already tested this circuit with only one modification, I changed the R2 to 300kOhms which worked in my case. I interfaced this circuit to a microcontroller where they shared a common ground. I ...
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3answers
114 views

Simple RS232 to 8 bit Parallel circuit

I want to make a simple rs232 to parallel (8 bit) converter. I would like the input to 1 wire and the output can just be 8 bit with no strobes etc. and run at high speeds (ideally up to 1Mbps, put ...
1
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1answer
92 views

Question on parallel resonance

I cant interpret what this question means. Can anyone help me answer it. Thanks in advance
1
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1answer
83 views

Final voltage of two parallel (switched) capacitors

I am trying to obtain a resistance-circuit equivalent to a switched-capacitor circuit. It is the first stage of a ladder filter. simulate this circuit – Schematic created using CircuitLab ...
2
votes
1answer
72 views

getting more from batteries via series connection

Let's assume I have a 100W load. If I run this load on two 2000mAh 3.7V batteries in parallel then I should get a continuous run time of 8 min 53 seconds (given the 27 amp draw). However if I were ...
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1answer
177 views

RC Filter Circuit Question

Given the image below, we know that the second filter circuit is a Passive Low Pass Filter circuit. I'm assuming it is still a Passive Low Pass Filter with a different corner frequency. Am I correct? ...
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2answers
66 views

Constant current power supply and 2 LED - series or parellel?

I have a very limited understanding of how current works in parallel or in series. I am trying to connect a pair of LEDs to a constant current power supply (1200ma) in which the power supply ...
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2answers
168 views

Calculating resistance of series/parallel circuit

If I have a configuration of 5 resistors as follows: simulate this circuit – Schematic created using CircuitLab How can I calculate the expected total resistance between A and B, given ...
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1answer
142 views

Panic button alarm system circuit [closed]

I'm a homeschool mom with absolutely minimal knowledge of electronics. How should the following panic button alarm system circuit look? Four cells connected parallel or series, two panic buttons ...
0
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2answers
241 views

Can 2 boost converters outputs be put in parallel at the same voltage?

I have a slight doubt here. Can the outputs of 2 boost converters set to output the "same" voltage (isolated, they would never be exactly the same obviously) be safely tied together, as long as there ...
0
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2answers
81 views

Principles of Electronics Question Parallel Circuits

In a four-branch parallel circuit, there are 10mA of current in each branch. If one of the branches opens, the current in each of the other three branches is a) 13.3 mA b) 10 mA c) 0A d) either (b) ...
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2answers
101 views

Solar Panel Cellphone Charger - Not Enough Current?

The Materials : 1) 3 X 1.5W 6V Monocrystalline panels @ 320mA 2) DC-DC Variable Voltage regulator 3) 3 X 1N4001 Diodes The Problem : - I have connected the panels (which give about 203 mA ...
0
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1answer
124 views

Can I overload resistors when they are in parallel?

I have 10 x 100 ohm, 1/4 watt resistors in parallel, to get a total resistance of 10 Ohms. I do not have a datasheet for these, so I cannot look up the maximum ratings or anything like that, so I ...
0
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3answers
286 views

Can I just connect two CR2032 batteries in parallel?

I'm designing a device with a small current draw that will mostly sleep in a very low power mode and I need to use button cell batteries due to a limited thickness. I would like to double time between ...
1
vote
1answer
86 views

How will unmatched lithium-ion cells in parallel react?

We are stocking a portable power pack for USB charging. We tested them when they first arrived and found no issues but after 3 months we tested some of the remaining stock and found about 50% of them ...
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2answers
165 views

Voltage not dropping in circuit

This schematic shows the circuit that I'm trying to build. At the moment I'm not using V2, as I'm having a problem with V1. From my understanding the diode should drop the voltage by about 0.7V, and ...