Latest threads in ⏚ Electrical Engineeringshow only best voted threads
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Favorite bench supply circuit?
I want to build a bench power supply, and am looking 'round the net for a good circuit. Requirements: 2 outputs, adjustable v, adjustable i, v & i meters (or digits). Prefer 30v max, or similar....
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17 years ago
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15 | |
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lasers
Can you use a laser to transmit electricity? Have we done this practically, or is it only a theory? If so, what is the efficiency? Does anyone know the efficiency of a typical high tension line? Tim...
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17 years ago
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vector groups
could any one please tell me why vector groups are important in transformer connection?
5
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17 years ago
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Obtaining DC motor parameters
Hi, I need to determine all the parameters of a small DC motor, such as winding resistance, inductance, torque etc. I have already determined the operating voltage, current and the speed. No access to...
6
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17 years ago
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6 | |
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50 - 60 Hz system
hey folks...... could anyone post da advantages and disadvantages of having 50 and 60 Hz systems and what is the effect if we adopt higher freq system instead of 50 Hz?
6
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17 years ago
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6 | |
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Free energy
I was watching Myth Busters. They raised a coil of wire to some high voltage transmission lines. It looked to me like they had the turns parallel to the power line. They were not able to have much...
11
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17 years ago
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11 | |
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Photo-etch light source?
MG Chemicals sells pre-sensitized copper-clad PCB blanks for use with their exposure and etch kit. Pretty straightforward "print pattern on transparency; place on PCB; expose to light; wash off...
19
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17 years ago
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19 | |
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Anodes
How do you determine the proper size, placement and type of anode (magnesium/zinc?) to install on a steel storm shelter? One is 5'x5' the other 5'x10' both are 10 gauge.I've read that too large an...
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17 years ago
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Service info Tefal stean iron
I would like to discover how I can gain service access to a Tefal Avantis 130 steam iron which after about4 years has developed an internal leak. One security style fastener is visible on the rear of...
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17 years ago
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Washing m/c 240 50Hz Connect to USA dryer plug??
Hi Everyone and thanks for the great discussion last October and November that had the title: Washing machine 240v, 50Hz --- 240v, 60 Hz? The machine has now landed ;-) and it's time to test your...
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17 years ago
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Headphone impedance mismatch
I've got a multi-track recorder whose output impedance is 30 Ohms, and I can't find any headphones with that type of impedance. Using normal (8 ohm) headphones really makes the sound crappy. Is there...
5
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17 years ago
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5 | |
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VERY simple dc motor drive circuit?
5vdc/670mA max miniature gear motor (load is such that current will be far below 670). I want to set speed with pot control and leave it (may replace pot with fixed R when best speed is discovered)....
28
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17 years ago
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28 | |
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Diode identification?
It's shorted, burned on the side against the board, the side of the diode that has part of the p/n printed (of course)... Best I can make out is (reading around the diode: ITT 4? 47 Physically it...
48
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17 years ago
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48 | |
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Modeling Solar Cells
I'm working on a circuit using solar cells, but I'm not sure exactly how to model them. Are they a current device with limited voltage or voltage device with limited current? I'm thinking that they...
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17 years ago
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My stupid question of the day
Greetings, Even though I'm an EE, I've never gotten the answer to this question: Why is it that I am staring at 110VAC outlets on my desk and I can have a normal grounded 3-prong plug going into a...
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17 years ago
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