Latest threads in ⏚ Electrical Engineeringshow only best voted threads
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controlling the speed of single phase capacitor run induction motor
Can I control the speed of single phase capacitor run induction motor using power mosfet which is driven by sg3524 pwm IC ? thanks
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17 years ago
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Where to hook ground?
Hello everybody, I am having some issues with trying to figure out where to connect a ground. Basically, I have a 12V light inside a metal structure, and want to ground out the structure just in case...
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17 years ago
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Industrial Power Cable Sizing
I need to size a power cable to connect a large channel inductor furnace to the power supply. The cable length will only be 3 to 4 feet. How can I calculate the needed cable gauge at for up to...
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17 years ago
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Interfacing 0809 adc with pc
Can somebody help me interface 0809 ADC with the pc and what language can I use to program for processing the data and how can I drive a fan based on the program.
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17 years ago
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Electrical Energy Meter on-line with System Embedded and Web Server
This it is a development of a electrical energy meter in line with real time, using systems embedded GNU, it is similar but articulate IEEE: it is a application industrial of NEC:
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17 years ago
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Verizon Internet DSL Filters ?
Hello: Have just received as a gift one of those Sony "recorders" with a HD in it that is supposed to be an equivalent to the TiVo units. Haven't played with it yet. Also, brand new user of Verizon...
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17 years ago
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street lights
I noticed that a lot of dark street lights seem to turn on when I walk under them. I'm pretty sure they're not designed to do this. Any ideas why this happens?
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17 years ago
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Electric Shock in Apt
I live in a 100 or so year old apartment building. They are doing some major renovation work in the basement. For the last few days I have been getting lots of electric shocks when I touch various...
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17 years ago
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4.8A @ 240V vs. 11.6A @ 120V - voltage efficiency
I was looking at a power supply on a big server box the other day and noted just how much power it seems to be wasting (presumably as heat as opposed to some other means like microwave radiation or...
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17 years ago
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Energy of an Engine
I'm a computer science and math major, but am doing a project involving escalators (and their engines). In the project, I am making the assumtion that there is a function (call it E(s)) that gives the...
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17 years ago
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Oscilloscope
I am comparing two out of phase signals using an oscilloscope. How would I determine the time in seconds that one signal is leading another.
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17 years ago
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compact fluorescent help needed
I am a mechanical engineer and am having a little trouble with a project that i am working on. I need a little help. I am wanting to have a light source of multiple full spectrum compact fluorescent...
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17 years ago
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Frequency problem:
I've got an op-amp which subjects two seperate signals simultaneously. The unfortunate thing is that both signals have similar frequency bands so a simple band-pass circuit will not suffice in...
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17 years ago
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Any of you guys here in Australia, have a 60KVA UPS I need to find a home for
pics here:- on left takes 32 off 80AH 12v batteries, UPS is 99% transformerless AUD$ 12K inspection welcome, suit chalets in rural area or small business not already connected to grid power in rural...
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17 years ago
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Digital E Field Meter -- who makes it?
Likely it's European, probably German in manufacture. (The guy who was demo-ing it was German, I think.) LCD readout of field strength, and audio clicking (like geiger meter). Attached image will go...
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17 years ago
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