Electrical Engineering Forum

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Join the expert discussion on electrical engineering topics. Topics like the uses of electricity and the equipment for power generation. Circuits, Fiber, Signals and Systems, Semiconductor Devices...
Capacitor charging: Where do extra electrons come from?
  • LarryS
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3
What's the Athena (Silvaco) code for pyramid texturing on a solar cell?
  • EliaJhon
  • · Replies 10 ·
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10
Help me breadboard my circuit
  • bremenfallturm
  • · Replies 10 ·
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10
How to Measure Current in a Hall Bar Device Using SR830 Lock-in Amplifier?
  • K_c_1
  • · Replies 5 ·
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5
Maxwell Linear Generator (Input Power < Output Power and losses?)
  • mos962
  • · Replies 2 ·
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2
Flux direction through core
  • FusionJim
  • · Replies 6 ·
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6
Spark Gap Tesla Coil not working
  • S4rd3l
  • · Replies 2 ·
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2
Draining batteries into fewer batteries
  • LightningInAJar
  • · Replies 13 ·
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13
How does AM broadcasting/receiving work + a project for HS students?
  • BiGyElLoWhAt
  • · Replies 20 ·
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20
Excitation of wispering gallery mode in resonator
  • yefj
  • · Replies 4 ·
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4
Charging and discharging a battery at the same time
  • CWatters
  • · Replies 2 ·
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2
Manual frequency tuning of a sapphire resonator
  • yefj
  • · Replies 2 ·
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2
Help with Ansys Electronics error please: "The quality of some mesh elements is not acceptable for solution"
  • uze1
  • · Replies 2 ·
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2
Instrumentation Amplifier for Wheatstone Bridge Output
  • Micheal_Leo
  • · Replies 27 ·
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27
Alternative formulas for Ohms law
  • brinker
  • · Replies 4 ·
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4
Is my contractor upselling me?
  • DaveC426913
  • · Replies 28 ·
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28
Relay Control of Induction Motors
  • neilparker62
  • · Replies 5 ·
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5
DC-Link Capacitor Current Modeling for a Voltage Source Inverter
  • user2539
  • · Replies 1 ·
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1
Can a 2' Multicolor LED Strip Be Powered by Two CR2032 Batteries?
  • Lyyle Morgan
  • · Replies 8 ·
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8
(I) [Inquiry] Analyzing a Commercial Smart Glass Product
  • alyami
  • · Replies 6 ·
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6
What Do Amp Ratings on Automotive Relays Mean?
  • Alfa romeo junior
  • · Replies 10 ·
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10
Variable Gain Preamplifier using dc control voltage
  • nauman
  • · Replies 9 ·
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9
Does placing two inductors in series make a current lag of 180 degrees?
  • PLAGUE
  • · Replies 3 ·
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3
Wireless control of mains outlets -- which system to use?
  • sophiecentaur
  • · Replies 3 ·
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3
Cost Efficiency Study Comparation of PMSM and BLDC Motor
  • sambbal
  • · Replies 3 ·
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3
Elevation angle of a phased array antenna
  • senmeis
  • · Replies 6 ·
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6
Multiple electric generators on the same drive shaft
  • Questioneverything
  • · Replies 3 ·
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3
Leeson feedback mechanism question
  • yefj
  • · Replies 1 ·
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1
Superconductor at room temp
  • Jlarkin84
  • · Replies 9 ·
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9
Query about single-ended LED tubes
  • Steve4Physics
  • · Replies 10 ·
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10
Power wheelchair switches off and shows two red lights flashing
  • risina79
  • · Replies 8 ·
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8
Analyzing pushbutton switch ADC circuit edge cases
  • bremenfallturm
  • · Replies 4 ·
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4
How does a Permanent capacitor motor actually work?
  • NTesla
  • · Replies 7 ·
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7
LTSpice DC - AC Inverter Schematic Help
  • NightStar
  • · Replies 4 ·
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4
Help with CE-102 test -- failing with emissions too high
  • core7916
  • · Replies 16 ·
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16
Low-noise Amplifier for a sensitive radio receiver
  • WonderNomad
  • · Replies 4 ·
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4
Noticed something in a clockwatch
  • hagopbul
  • · Replies 12 ·
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12
PVC Induction Heating Coil Design (early thoughts)
  • RickDelta
  • · Replies 51 ·
2
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51
To detect 12V using Opamp
  • PhysicsTest
  • · Replies 17 ·
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17
Dual band gap resonator design question
  • yefj
  • · Replies 6 ·
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6
Need help wiring a motor switch
  • gmax137
  • · Replies 9 ·
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9
3-phase synchronous machine => 5-phase synchronous machine
  • mad mathematician
  • · Replies 3 ·
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3
High-energy LC oscillatory discharge: what kind of switch?
  • Majorana
  • · Replies 19 ·
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19
Basic question about RLC circuits
  • Malamala
  • · Replies 32 ·
2
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32
Improving coupling of a resonator by looking at surface currents
  • yefj
  • · Replies 1 ·
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1
Yellow Epoxy Like Material on PCB?
  • BuddyBoy
  • · Replies 5 ·
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5
Improving matching by adding a stub
  • yefj
  • · Replies 8 ·
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8
Electromagnetic field under different perspective
  • Roberto Pavani
  • · Replies 1 ·
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1
Faraday disc voltage increase
  • FusionJim
  • · Replies 3 ·
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3
Should I Diagnose My Non-Responsive Panasonic Microwave Before Replacing It?
  • DaveC426913
  • · Replies 30 ·
2
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Control Theory -- Systems where the controller also changes with time
  • mad mathematician
  • · Replies 1 ·
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1
Why do the spectra of distorted waves have humps?
  • danbullard
  • · Replies 4 ·
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4
Home Solar Power Feed-in Tariff for Historical Domestic Installations in the UK
  • sophiecentaur
  • · Replies 7 ·
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7
Seeking Advice for building a Power Distribution Board for 50 V and 1000 Amps
  • Samarth-R
  • · Replies 4 ·
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4
Electronic Keyboard Goes Out Of Tune
  • Hornbein
  • · Replies 10 ·
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10
Self excited induction generators and grid connected solar inverters?
  • looking
  • · Replies 9 ·
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9
Deciding batteries for my circuit
  • bremenfallturm
  • · Replies 3 ·
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3
Charlieplexing: LEDs have different brightness
  • bremenfallturm
  • · Replies 14 ·
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14
Testing My Superconductor
  • auto_v
  • · Replies 23 ·
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23
Need an electromagnet to play Chess
  • queenidog
  • · Replies 37 ·
2
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37
Substation main xformer earthing?
  • Ryoko
  • · Replies 8 ·
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8
Capacitor plate current skin effect
  • FusionJim
  • · Replies 30 ·
2
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30
Basic Circuit: Why don't these two LEDs light up?
  • bremenfallturm
  • · Replies 9 ·
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9
Microstrip transmission line teardrop-shape power divider question
  • yefj
  • · Replies 10 ·
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10
MMF diagrams of transformer construction options
  • simphys
  • · Replies 9 ·
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9
Question related to circuit for actuating Fuel Injector
  • core7916
  • · Replies 10 ·
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10
Overvoltage Protection
  • Hfuda
  • · Replies 5 ·
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5
How does this antenna balun work?
  • Guineafowl
  • · Replies 28 ·
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28
Interesting coupling logic of feeding network resonator
  • yefj
  • · Replies 0 ·
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0
Help in understanding current ratings of wires from datasheets
  • Wrichik Basu
  • · Replies 10 ·
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10
Some house lights start blinking when another section is turned off
  • Wrichik Basu
  • · Replies 24 ·
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24
How much current in this wire to reach observed temperature?
  • ethompson
  • · Replies 29 ·
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29
Winding an electric motor's stator
  • damzi
  • · Replies 2 ·
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2
Calculation of induction heating setup power consumption
  • hxianc
  • · Replies 5 ·
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5
Generating electrical energy using an intermediate reference frame
  • Ivan Nikiforov
  • · Replies 40 ·
2
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40
Fourier transform of PSD
  • mad mathematician
  • · Replies 4 ·
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4
Electric mattress pad tingles when turned off
  • Lennard
  • · Replies 6 ·
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6
Power divider: reverse engineering strategy
  • yefj
  • · Replies 1 ·
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1
Need help in understanding these circuits
  • WifesBoyfriend
  • · Replies 2 ·
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2
Is Baseload Power an Outdated Concept in Australia's Evolving Energy Landscape?
  • bhobba
  • · Replies 31 ·
2
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Voltage gain of a bipolar transistor circuit
  • eyeweyew
  • · Replies 23 ·
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23
Theory for a PCB resonator with special kind of mode
  • yefj
  • · Replies 20 ·
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20
How Can I Improve My DIY Van de Graaff Generator to Prevent Charge Leakage?
  • Blaze1212
  • · Replies 5 ·
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5
K Type Thermocouple Probe short Circuited with Metallic Body
  • arham1026
  • · Replies 2 ·
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2
COMSOL simulation of a 3D Ferrite Bar Numerical Model For Magnetic Flux
  • Hasan2022
  • · Replies 5 ·
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5
High-pitched, shrill sound from MCB as the current increases. Is the MCB the culprit?
  • Wrichik Basu
  • · Replies 18 ·
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18
What Is the Fundamental Unit of CCD/CMOS Sensors Called?
  • doofus
  • · Replies 25 ·
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25
40A MCB will trip, but 63A won't: Is this logic even logical?
  • Wrichik Basu
  • · Replies 36 ·
2
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36
Resistance, capacitance, inductance of a real wire
  • crashcat
  • · Replies 2 ·
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2
How to determine kVA for my house? (to buy a servo stabilizer)
  • Wrichik Basu
  • · Replies 2 ·
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2
Long-term Capacitor storage questions
  • augustaa88
  • · Replies 3 ·
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3
Problem with SPICE calculation of the ripple in half-wave rectifier
  • Gio47818732
  • · Replies 5 ·
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5
Discrepancy in calculating Q Factor using Energy instead of R/wL
  • phantomvommand
  • · Replies 14 ·
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14
Creating a negative voltage rail for MOSFET driver
  • DaDes
  • · Replies 5 ·
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5
High voltage surface conduction prevention
  • zaillian
  • · Replies 3 ·
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3
Surface oxidation of aluminum alloy and electrical continuity
  • rmain
  • · Replies 16 ·
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16
Electron Current/movement in P-N junction under forward bias
  • MaestroBach
  • · Replies 3 ·
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3
What are the limitations of CRT display technology? resolution, nits, ....
  • jman5000
  • · Replies 66 ·
3
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66
Periodic Boundary Conditions Unit Cell vs Transmission Line Model
  • katto01
  • · Replies 1 ·
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1
Building a polarizer from FR-4?
  • yefj
  • · Replies 7 ·
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7