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

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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 ...
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2answers
49 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 ...
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0answers
35 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 ...
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2answers
60 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?
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1answer
49 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 ...
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0answers
55 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 ...
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1answer
51 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 ...
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3answers
97 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 ...
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1answer
34 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? ...
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0answers
44 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 ...
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1answer
38 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 ...
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1answer
49 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 ...
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1answer
25 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 ...
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1answer
47 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 ...
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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 ...
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3answers
77 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 ...
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1answer
57 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 ...
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4answers
74 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 ...
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3answers
359 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 ...
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2answers
60 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 ...
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4answers
113 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 ...
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1answer
49 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 ...
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2answers
354 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 ...
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0answers
61 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 ...
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2answers
76 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?
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0answers
25 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 ...
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2answers
72 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 ...
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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 ...
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2answers
109 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 ...
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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 ...
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1answer
61 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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38 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
285 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 ...
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1answer
77 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
131 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
72 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
107 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
122 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
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2answers
91 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
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1answer
103 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
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4answers
342 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
778 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
104 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
67 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
97 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
44 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
95 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
112 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 ...
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3answers
185 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
96 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 ...