Recent content by Introyble
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Help! My Electromagnet Won't Work!
Yeah, continuity. Turn the meters to ohms Ω Not sure what kind of meter you have, if you have several ranges for Ω go to something near 200 Your going to put one lead on the core itself. Just pick a spot that isn't covered by wire. Put the other lead on the wire you have been hooking...- Introyble
- Post #9
- Forum: Electrical Engineering
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PID Current Control for Laser Diodes
Although, I won't disagree completely with Wind, depending on the application the answer to your question is yes. PIDs often are aimed at controlling pulsed inputs/outputs. However, I think what you want, if I'm understanding correctly, is a driver. If this is a homework question then please...- Introyble
- Post #3
- Forum: Electrical Engineering
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Help! My Electromagnet Won't Work!
You probably have shorted the coil. From the picture it looks as if your have tinned your wire to the core. Do you have an ohm meter?- Introyble
- Post #3
- Forum: Electrical Engineering
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Undergrad Ride on Atlantis Space Shuttle: Questions about Lift Off & Re-Entry
A great question, here is a fantastic engineering series by Nat Geo. This particular episode is about the Space Shuttle. A marvel of physics at a mere 37 million horsepower. Watch this, you will get many answers. https://www.youtube.com/watch?v=XZkhK4mgxao -
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Undergrad What is the relationship between generator output and RPM?
Or am I thinking about that incorrectly? A short will still place a load. AC wouldn't behave that way since the definition of a short is somewhat more complicated. -
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Undergrad What is the relationship between generator output and RPM?
Since the current would obviously decrease from the lack of motion I would venture a guess the fault would counter the effort you exerted mechanically. Or in other words, the harder you pedal the more you increase the need for mechanical effort. -
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Undergrad A Problem with Two Current-Carrying Wires
They also discovered that a pair of wires of thin gauge (insulated) will accidentally become an antenna and cause frequency problems in certin applications.- Introyble
- Post #4
- Forum: Electromagnetism
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Undergrad The way the potentiometer measures
Yeah, I seen your reply you must have edited it? I think there is a more plausible explanation that you have questions about a pot. Allow me to offer a couple of caveats. Since I don't know the type of RTD you are utilizing I will say that polarity is essential in many common types. If...- Introyble
- Post #5
- Forum: Electromagnetism
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Undergrad The way the potentiometer measures
Moving to the second paragraph. Typically a pot used in the manner you are describing the voltage is given and well known and almost always 10 VDC. We know E and R so we can then calculate I. Most RTDs (the thermocouple) are exactly that an RTD a resistive thermal device. It requires no E or...- Introyble
- Post #3
- Forum: Electromagnetism
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Undergrad The way the potentiometer measures
I read the opening paragraph and had to stop. You lost me right from the start. A pot doesn't measure anything. A pot is a variable resistor that changes the current into a quantitive amount that is interpreted by whatever- Introyble
- Post #2
- Forum: Electromagnetism
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High School What shape should my iron core be for a strong electromagnet?
Why are you using 12 awg wire with 6 VDC? Are you using magnet wire? I wouldn't increase length as much as I would wraps. The 12 vdc car battery will increase the magnet field but so will increasing the number of turns or layers. Keep the turns tight. Doubt you should have to have a 10...- Introyble
- Post #9
- Forum: Electromagnetism
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High School What shape should my iron core be for a strong electromagnet?
Assuming you are charging: When you talk about cooling down a battery it's important to note that if you are returning a battery to charge without adequate cooling down cycles then you only serve to hyperinflate the rate of temperature rise while under load. Since one perpetuates the...- Introyble
- Post #7
- Forum: Electromagnetism
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Equivalent impedance per phase (3 Phase balanced systems)
RLC parallel circuits?- Introyble
- Post #2
- Forum: Electrical Engineering
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LED's in Series Vs LED's in Parallel
Dave, why not the1970's christmas light argument on the series option? Which is more efficient? Do the math, I don't want to. Which loses the most due to heat? Which ever one is mathmatically using less wattage is the option I pick. Would you consider that a load resistor? :devil:- Introyble
- Post #20
- Forum: Electrical Engineering
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LED's in Series Vs LED's in Parallel
Let's do this for fun please? Debate this topic from the true stand point of modern engineering. No, I don't mean academic theory vs real world experience. I mean, the cheaper the better! Now pretend you own the market share and like you are trying to gain market share. Accounting balance...- Introyble
- Post #19
- Forum: Electrical Engineering