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

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0
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2answers
97 views

Noob trying to select resistor for 3 LEDs

So I'm making a parallel LED circuit using THREE CREE x-lamp LEDs which typically run at ~ 3.1v @ 350 mA, but they can max out at 1000 mA. I'm putting a resistor for each LED. So my logic may be ...
0
votes
1answer
41 views

is it possible to connect ac power source to battery in parallel connection ?

Is it possible to connect ac power source & a battery in a parallel connection where a battery is low voltage & have current more then the internal resistance of circuit ? As the battery is ...
0
votes
3answers
99 views

Can I combine 3x 1000ma power supplies (wall warts) to get a 3amp supply [answer: no]

I have a device that requires 3amps 9v. I also have 3 1000ma power supplies (wall warts.) Can I cut the wires of these power supplies, reconnect them all together in parallel, and use them all as a ...
2
votes
2answers
156 views

Parallel resistor and capacitor in non-inverting voltage follower

For an inverting voltage follower, C1 would be part of an LP filter. But in the depicted non-inverting voltage follower circuit, what is the purpose of C1 (if any)? simulate this circuit ...
0
votes
1answer
55 views

PS2 or USB keyboard for custom CPU

I have made a CPU on an FPGA board. It works great but I cannot proceed to make a computer with it until I have an input. What use is a computer if it can talk to you, but you cannot talk to it? It ...
0
votes
3answers
96 views

How can I be sure to supply enough current without increasing the voltage? [closed]

I have been trying to supply 5V into parallel-connected components which require a certain amount of current in total. If I wanted to increase the current from my supply, can I increase its current ...
0
votes
0answers
44 views

Parallel FFT on Xilinx FPGA

I am trying to compute the Fast Fourier Transform (FFT) of 16 parallel input data and therefore, I would like to retrieve 16 output data in parallel. The transform size of my project is N=16. More ...
1
vote
1answer
36 views

How to connect Li-ion batteries with thermistor pin in parallel?

I have a Li-ion charger with 3 contacts: (+) (-) and (TH), based on TP4056 chip. I also have several batteries with corresponding contacts, and the charger does a good job charging them. Now I would ...
0
votes
0answers
57 views

Using Compact Flash card as RAM for CPU without ICs

I'm planning to build a basic CPU without using any ICs. As building a large memory flip flop array would be infeasible (and I don't want to use something like a SRAM IC) I had the idea of using a ...
1
vote
2answers
66 views

What are the consequences of connecting two motors in parallel?

I am using two DC motors rated at 36V and maximum current draw of 5A. To reduce the number of motor-controllers, I am planning to connect them in parallel. The two motors are required to run at the ...
0
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0answers
36 views

Does connecting different solar panels in parallel affect total current? Are there any dangers? [duplicate]

I've posted this question on another forum as well but got no usable replies. I've done a lot of research but only found info about batteries in parallel, which says higher voltage will charge lower ...
2
votes
2answers
78 views

Thermal Runaway in Diodes

Datasheet for 1N5406 diode states "3.0 ampere operation at Ta = 75°C with no thermal runaway". What does this mean exactly? Can I place these in parallel to increase current capability?
0
votes
1answer
59 views

Charge Lithium-Ion batteries using a solar panel in parallel

I want to charge some Lithium-Ion batteries using a solar panel with this loading circuit found on ebay here. Apparently it works fine with just one Li-Ion battery, but I would like to extend the ...
0
votes
0answers
59 views

Series/Parallel configuration?

If I had a large bus bar, then split it into to pieces, and in between I connected them via separate wires that have their own insulation depicted in this simple diagram: At point A it shows the ...
-3
votes
1answer
59 views

Circuit diagram of a household connection [closed]

Often, multiple electrical outlets within a given room are all part of the same circuit. So how would you draw an "equivalent circuit" for a four-walled room which has a single electrical outlet per ...
0
votes
3answers
122 views

Will connecting two batteries in parallel increase current drawn in simple led circuit?

I have a resistor diode circuit that I'm powering with a 9V battery. The circuit diagram below is a simplified version of it. The real one has 4 LEDs, 8 resistors. I want to deliver 30mA to the ...
0
votes
1answer
36 views

Can I run two LED strips in parallel?

I'm considering bying this LED strip for better lighting around the bathroom mirror, but I'd like to cut it into 1/3 and 2/3 and arrange them in parallel. Is that possible with the given parts? ...
0
votes
0answers
45 views

Single resistor with same characteristics parallel LEDs? [duplicate]

This type of question is asked many times I believe, but what differs my question is that in this case all LEDs are same. So there is no chance that one LED will draw all the current and others won't ...
1
vote
1answer
49 views

Shift registers, understanding parallel-in serial-out

I have the 74hc597 parallel-in serial-out (PISO) shift register. The datasheet can be found here. I have a general idea about how serial-in shift registers (SIPO) work, but I'm having trouble ...
2
votes
1answer
67 views

LT Spice and inductors parallel to AC voltage sources?

This is a circuit I designed in LT Spice. There is no transformer component in LT Spice so I specified L1 and L2 as magnetically coupled with K L1 L2 1 when I try ...
0
votes
1answer
32 views

8-bit Serial I/O Parallel I/O Bi-Directional Shift Register [closed]

I am looking for a register that has as stated Serial In Parallel Out and Parallel In Serial Out modes and bi-directional shift functionality all in one IC. I want to use it with Arduino. Does ...
0
votes
1answer
55 views

Switching High Voltage Battery from Series configuration to Parallel configuration for charging

I have a question regarding switching batteries from series to parallel to charge them. I have 36 modules of 1Sx11P Li-ion batteries connected in series. During normal operation they drive a car ...
-2
votes
2answers
180 views

Are only word sizes used as structural elements in machine computation?

Research: I have been looking for some time online. everything i know in-fact. ive liked sparse matrix representations, i have found gate level sharing optimization after 'formula reduction' and ...
0
votes
3answers
78 views

Can (or should) two voltage regulators be connected in a parallel configuration. [duplicate]

I have two 5 volt voltage regulators that I would like to connect to a 9 volt source in a parallel configuration. Is this advisable, problematic, or even commonly done? I have tested this ...
0
votes
1answer
68 views

PIR in parallel [closed]

I saw this question and I think I have a similar problem/question. I have: IP Camera, DCS-7010L, 5 V, 1.2 A PIR, HC-SR501 (like the one of Kudos@Dave ... I think), 4.8-20 V(dc) input, 3.3 V output ...
1
vote
4answers
78 views

Are these resistors in parallel?

Suppose I have the following circuit: Are resistors R1 and R2 in parallel, assuming that through resistor R1 flows current because this circuit is connected as a feedback to another circuit? And if ...
3
votes
3answers
365 views

How to solve this resistive network using divider rules and ohms law

I have a homework problem I've been trying to solve. So far I think I'm using the right formulas for the calculations. I just need help finding: The total resistance of the circuit, finding Vab ...
0
votes
2answers
69 views

Why is a receiving circuit in e.g. RFID made resonant with a parallel capacitance instead of a series capacitance?

Take for example the schematic below of a inductive receiving circuit in RFID, where we want to maximize the voltage over the load resistor R4 (R3 is the resistance of the inductive coil, and the ...
1
vote
4answers
142 views

What is equivalent Resistor different Resistors put them in series or in parallel if they have a different wattage and different resistance?

What is equivalent Resistor of two this different Resistor put them in series or in parallel if they have a different wattage and different resistance? In practice somtimes we have a resistor with ...
0
votes
1answer
53 views

Three series LED arrays in parallel, resistor value?

i know this is possible but not sure how to work out the resistor value needed... I should point out that I am re-using a PCB that has had all the components removed. I need 15 LEDs in 3 parallel ...
5
votes
2answers
377 views

Can I parallel multiple resettable fuses to achieve a higher current rating?

I have an application wherein I spec'd a fuse, rated for 80VDC 500A. The customer is concerned about what happens if they have to replace the fuse, it being rather difficult to access. They suggested ...
0
votes
0answers
71 views

How can I add a resistor in parallel to a rheostat while keeping it linear?

I have a 25Ω linear potentiometer wired as a rheostat. I would like a range closer to 5Ω, so I added two 10Ω resistors in parallel. This gives me a range of 0 to 4.16Ω which is just fine, but the ...
-2
votes
2answers
80 views

Double the current capability of a mains socket by wiring another in parallel [closed]

I have an appliance that I know draws more or less 16A under 240VAC, but I only have 13A sockets around. Is there any off the shelf solution?
-1
votes
0answers
27 views

3s Lipo parallel usb charging board

I'm building a vaporizer and I would like to use 2 of these batteries in parallel. I don't want to keep removing the batteries and charging them separately I would like to just charge it through a ...
3
votes
2answers
80 views

Combine multiple voltage regulator?

Maybe this is very stupid question but I want to know if I can connect two or more voltage regulator (like LM7L05) to add ampere? Say if 1 is able to source 100 mA then combine 2 to draw 200 mA? Sorry ...
0
votes
2answers
68 views

Total current at the load?

Assume the voltages sources(InducedV1/V2/V3) are created by an inductor/or a strong magnetic field changing rapidly(or in anyway) the PS would power the load, however, there are induced-EMF's V1 in ...
0
votes
2answers
142 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
vote
1answer
61 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
vote
1answer
68 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 ...
-1
votes
0answers
41 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!
2
votes
2answers
338 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
votes
1answer
82 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 ...
0
votes
2answers
154 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 ...
0
votes
0answers
73 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 ...
-1
votes
1answer
110 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) ...
1
vote
4answers
124 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 ...
2
votes
2answers
95 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 ...
5
votes
1answer
111 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
400 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
865 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 ...