electrical-engineering

Designing a successful QSR (Quick Service Restaurant) in Texas involves much more than creating an efficient floor plan. From high-powered kitchen equipment to drive-thru technology systems, electrical design challenges in QSR projects can quickly become major construction and operational issues if not addressed early.
I am attempting to replace a selenium rectifier in a Lafayette LR-800 tube amp. The old rectifier gets 15vac in, and my voltmeter measures -9.75vdc output (positive ties to the chassis) under load. I ...

Scientific Reports, Published online: 05 May 2026; doi:10.1038/s41598-026-44932-4 A novel reduced-switch asymmetric multilevel inverter with scalable structure and flexible source selection algorithms
I come across a transistor circuit below. Can anyone tell me what is this circuit and how it work? Thank you.

Scientific Reports, Published online: 04 May 2026; doi:10.1038/s41598-026-50002-6 Calibration of impulse high-voltage test systems above 500 kV peak: implementation and evaluation
Electronics newbie here. I took apart a bug zapper to analyze its circuit and found things done differently from the 'typical' circuits you'd see in a Google search, and I'm having a hard time ...

Scientific Reports, Published online: 02 May 2026; doi:10.1038/s41598-026-50669-x Exact traveling-wave solutions and dynamical behavior of nonlinear low-pass electrical models in the fractional framework
This is what I have so far but I don't think I am going in the right direction. Objective: The LEDs should "count" the number of switches in the ON position, so: When all switches are off, ...

current is acutally positive, L1 polarity is reversed. Transformer is a 1:20 step up I suspect that the intial large spike is happening because of the reverse current of the diode causing a temporary ...

I was able to understand that an inductor resists a change in current through it and a capacitor resists a change in voltage across it, however consider the below circuit: In this circuit the source ...
Problem 5.83 from Sedra and Smith provides the following circuit, and asks the reader to determine \$V_{B1}, V_{E1}, V_{C1} V_{E2}, V_{C2}\$ assuming that \$\beta = \infty, V_\text{fwd} = 0.7 \: ...

A complete beginner here when it comes to electrical stuff, but I'm planning on learning a lot more in the future. Meanwhile, What I'm wanting to achieve is a master switch for power delivery to ...
This is from an IP camera PTZ (KKMOON). It has 5 pins and says: "FA2J6K". It has the following voltages: I.A says it could be: "xc6221" but pin out are wrong. Also ...

A study of a direct current electrification of the Boston to Providence division of the N.Y., N.H. & H.R.R. Ramsbottom, J. Raymond.; Tierney, Harold J. Thesis: B.S., Massachusetts Institute of Technology, Department of Electrical Engineering, 1917
Nature Electronics, Published online: 30 April 2026; doi:10.1038/s41928-026-01614-3 The ohm has been the unit of electric resistance for more than 150 years, but what we exactly mean by ‘a resistance of x ohm’ has evolved in terms of both meaning and magnitude during that time. Its realization has changed from mercury columns to mechanical constructs, and is now linked to immutable constants and …
You’re based at Artemis Station on the lunar south pole, and you’re monitoring your 12 autonomous rovers that are exploring the surrounding terrain for signs of water ice or other essentials minerals. They’re about 3 kilometers out when you suddenly get a NASA Alert for an incoming solar storm. You know the rovers won’t return to base before the storm hits, but you’re calm knowing the rovers all …
All of the electrical boxes at my house have every neutral tied together and all grounds separately tied together. I understand this is standard practice because you can control 2 light switches on ...

Security coverage is a key component of a systematic framework for comprehensive, traceable security verification. The post Assuring Comprehensive Security Coverage In Hardware Design appeared first on Semiconductor Engineering .
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