Questions tagged [network]
Questions related to the interconnection of electrical components. Consider using "circuit" if they are in a closed loop.
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By using superposition theorem calculate the current flowing through the 10 Ω resistor in the network shown in the figure [closed]
I can figure out the current through the 10 Ω resistor with respect to the 40 V potential source and the 10 V potential source but I am not able to figure it out for the 10 A independent current ...
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How to write the equation for the input side of a JFET?
I have been reading about the voltage gain of JFET, but I am unable to understand how to write the equation for the input side. Can somebody explain the method to write the equation for the input ...
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Delta to Y with sources?
I'm wondering if this transform is possible:
I tried doing a source transformation to change this to a regular delta network with two current sources going to nodes a and b, but wasn't sure how to ...
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Two-port network
I have been trying to solve a problem on two-port network but I am getting two different answers:
APPROACH 1:
In the problem the Y-Parameter is given so I converted Y parameters to H parameters and ...
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Two port network analysis
In the given problem we were required to calculate the input impedance of the given two port cascaded network.
So my approach was that I first calculated the transmission parameters as given below
...
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Mesh analysis of circuits
In this question we are required to find the nodal voltages and current in the circuit.
Why is the 3A current not divided at node (d), that is, one going in 5 ohm resistor and other towards the ...
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NIC network circuit with grounded output?
My class was given a series of circuit networks to calculate the transmission of the system. One of those networks is this type of Negative Impedance Converter with the common ground output.
How can I ...
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My wiznet 5500 ethernet circuit is not working ( using it ESP32 s3 )
I made a custom PCB board with w5500 ethernet IC and ESP32 S3 module and it's not working at all, even the RJ45 connector LEDS aren't responding when powering the circuit.
here's the schematics of my ...
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ENC28J60 fails after some time of constant operation
Context:
I have designed a custom pcb utilizing the ENC28J60 ethernet chip to
be used with raspberry pi. The board has 5V in which powers both the
ENC28J60 (through a AMS1117-3.3 LDO regulator) and ...
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What is the current through the resistor?
In the figure we are supposed to find the current in 8ohm resistor. So by using simple KVL rule I was able to figure it out to be -1.25A.
But in the second approach
When I calculated current in 8 ohm ...
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Solution of electrical network where arbitrary initial conditions cannot be assigned
Please consider the circuit below:
I'm trying to figure out how to formulate and solve some differential equations for this circuit. If I assign a state vector of:
$$
\textbf{x} = [V_{C1} \ V_{C2} \ ...
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How do I go about calculating the phase of a complex transfer function at 10 kHz?
I need to calculate the phase of this two-port network at 10 kHz (see below).
I found phasor by first finding Z_total by using the formula:
Z_total(series) = Z_R + Z_C + Z_L to give:
Z_total = -i/2pi ...
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KVL/KCL and Thevenin Concept [closed]
I have solved the following question but little bit confused that this solution is correct or not as attached in figure.
How can I solve this question by KCL/KVL also if by using Thevinin theorem its ...
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Physics diagram to electrical schematic
After waiting a reasonable amount of time with no answer here, I have duplicated this question at Physics Stack Exchange.
I am asking this question on behalf of user furious.neutrino. This question ...
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CAN Resistor Location Help
Having discussion at work today and wondered if someone could help clear my mind.
We are creating an RS432 network to control 3 aircon units.
The network requires termination using 120 ohm resistors, ...
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How is digital data sent over long wires?
I want to have a mental-model for how digital data is sent over wires for basic networking purposes. My current understanding is that on the transmitting side and receiving side, there are ...
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How to differentiate slave PCBs that are daisy chained together using one signal from the Master PCB
I need to daisy chain a number of slave pcbs, each with a NXP microcontroller to a master pcb with an esp32. The purpose of each slave is to interface to a motor control chip and handle CAN ...
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Getting different answers by Mesh and Nodal Analysis
simulate this circuit – Schematic created using CircuitLab
Naming the top two loop currents clockwise as i1 and i2 and the bottom two as i3 and i4. By inspection, we can say $$i_1=-1A$$
Now, ...
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Delta-Wye for voltage sources?
My question is if, and how I can find an equivalent network, which includes resistors and voltage sources in series with arbitrary voltages and resistances, so that to the outside the networks are ...
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Why are the TX+ and TX- pins on my laptop's Ethernet port shorted?
I understand that these are supposed to be differential signals with a resistance equal to the characteristic impedance of the cabling between them. However, using a multimeter to check the continuity ...
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Direct Ethernet link between Raspberry CM4 and Jetson Orin Nano
I need to have high speed communication between Raspberry CM4 and Jetson Orin Nano modules on the same PCB.
My question is: can I route them through Ethernet directly without the need for an isolator ...
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RC timing circuit using a 2N3904
I have a 12VDC source driving an LED thru a 2.4K resistor. When a 12VDC control turns on I want power the base of a 2N3094 thru an RC network to drop the LED voltage to 0 in .5 to 1 second. I ...
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Finding equivalent resistance if each resistance is 100 ohms
The method to follow here is wye delta transformation, the resistors across red and purple nodes are in series so 2R and using delta to wye in green-pink-blue, and pink-black-blue
after that there are ...
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How do I know when a circuit is unsolvable?
I know 2 formulas for basic cutset and loop, which is a number of equations that need to be solved circuit. But it does not mention when a circuit will be unsolvable. If number of equations become ...
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What is Cat 6 cable DC isolation?
What is the DC isolation of Cat 6 cable, between different pairs and between same pair? I could not find this information in the cable manufacturer's specs.
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Rollett stability factor - derivation and numerical meaning
For two-port networks, a value called the Rollett stability factor, K, can be derived, whose value can then be used to assess one of the criteria for the network to be unconditionally stable (K > 1)...
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Synthesis of Analog Circuits With a Desired Input and Output Characteristic
Before this I have always worked with digital circuit synthesis. I have designed circuits with combinational logic using Karnaugh maps, decoder encoder shift registers and so on. And I have designed ...
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Solving the problem of connecting a high-current, single-phase load to a three-phase balanced network
I am an electrical technician working in a hospital. In the laundry room, all the cloth washers contain three-phase motors which are balanced loads connected to a 140 A circuit breaker. The ...
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CSMA/CA - Why does RTS/CTS with ACKS not solve the exposed node problem?
I was reading up on RTS/CTS mechanism schemes and came across this statement on the Wikipedia article - "modern RTS/CTS includes ACKs and does not solve the exposed node problem"
According ...
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Wi-Fi (esp8266) Point-to-Point Connection
Is it possible to have a point-to-point connection over Wi-Fi, similar to how an RF Module would work. No connections involved, just sending or receiving data packets to all nearby networks. I am ...
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Is it possible to use basic networking on an FPGA without an OS?
I need to set up networking (just a basic echo server) on an FPGA board (ZYNQ Ultrascale+) using only the PL side. The end goal is to DSP a large amount of data coming from a receiver through ethernet....
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How to proceed with Thévenin
Find the short circuit current with respect to A and B.
When applying Thévenin's theorem to find Isc the 4 Ω resistor becomes 0. How to proceed further?
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Why are non-conductive circuits designed on PCB？
This is the PCB of the network communication industry.
What I know now is that after adding these redundant non-conductive circuits, the performance is improved from Cat3 to CAT5e.
I really want to ...
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What is required to create an offline TCP communication network?
I am designing an offline network consisting of a set of microcontrollers, with Ethernet capability, acting as servers, and a Raspberry Pi acting as a client for data collection.
The controllers are ...
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How do modulations depend on transmission media? [closed]
or how is transmission media affected by modulation? Is there any relationship?
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Is it possible in Profibus DP that slaves can talk each other?
I could not understand what Profibus DP is. Is it only I/O system which is controlled with a PLC or is it a complete bus system which controls the data traffic? If the second, I would like to ask if ...
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EEPROM size & Managed Mode vs Unmanaged Mode Ethernet Switch
I want to understand 2 points in Ethernet Switch ICs.
In this IC - LAN9353, on page 34, the description in the table is mentioned.
"A low selects 1K bits (128 x 8) through 16K bits (2K x 8).
A ...
user220456
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What is the current across the resistor given in the figure? [closed]
The circuit is short circuit across the the resistor. What will be the current flow across the 30 ohm resistor?
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Reflection in optical fiber
I took a measure (OTDR) of optical fiber from the headend and I got this :
In 10.7km The optical fiber have a "reflection". This reflection is holding 500 meters. After that reflection down ...
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Guidance on cables in parallel from visualisation
I've been told cable 1 is in parallel with cable 2 and 3 yet I'm not visualising it just yet. Could someone clarify whether it's that from the source there are 2 paths? Cable 1 and cable 2-3. Thanks
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How does line capacitance of overhead naked lines change with rain or snow?
Does line capacitance change with rain or snow? If yes, does it a lot (or is there a study that quantifies the change)? I ask it because I am studying the tuning of a Petersen coil, and I want to know ...
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Is Petersen coil in resonant network tuned also for capacitor banks?
Petersen coil is tuned every 2-3 minutes to compensate for a certain percentage of capacitive current in resonant grids during earth faults. But, if capacitor banks with ground connection are switched ...
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STM32 + LwIP + DP83848 - No results when I ping
I have made a PCB with an STM32F407 processor and I have been used DP83848 Ethernet PHY.
For STM32F407 processor. I have selected RMII settings.
The pinouts for the RMII settings.
Red rings got to ...
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Questions about understanding networks (Telecommunications eng)
So I read about Network topology, about typs of communications like ptp, ptmp, mptmp and about Addressing methods (multicasting, broadcasting), etc...
I'm very confused. What is the difference between ...
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Connecting two-port network theory to microelectronic design (Sedra and Smith)
I am trying to connect what I'm learning in Sedra and Smith (I am currently in Chapter 7 of the 7th edition which talks about basic transistor amplifier configurations, eg. CS) to what I have learned ...
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STM32 ethernet and TCP issues with firmware 1.27.0 and cubeide (probably at sending messages)
I would like to use the TCP/IP protocol (with LwIP, HAL library, without freeRTOS) in a project but I face some portability issues.
I'm starting with TCP echo client example as in chapter 6.1.1 of ...
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What is the phase difference between phases in 3phase system, if system becomes unbalanced
Is the phase difference between the voltage phase 120 degree in an unbalanced system if not what how can we calculate it?
I will try to explain this a litte more clearly.
More specifically in this ...
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Need help on resistor calculation
I'm currently work through an application note from Texas Instruments about building a programmable power supply. The base concept is fine and I understand it, now I'm trying to go through the ...
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Is this how cable networking works? [closed]
I am studying about how cable networks transmit data to various TV channels on our TV screen. It is fascinating to see how they work.
After studying different articles online, I have made points as to ...
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Method for minimizing relays in a switching/steering network - combinatorics algorithm?
I'm developing an industrial power device which has multiple power supplies that need to be multiplexed to multiple outputs (MIMO) through a network of relays. Similar to how digital logic can be ...
