Questions tagged [practical]
The practical tag has no summary.
38 questions
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How do I modify automotive jumper cables to safely jump an 8 volt system with a 12 volt car battery?
I have an antique truck using an 8 volt battery conversion from its original 6 volt because the starter turned too slowly to crank it. This protected the instruments from damage. If I need to jump ...
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Can reverse voltage gain for a BJT be negative?
While observing the input characteristics of a Bipolar Junction Transistor(BC547), I observed from the graph that the reverse voltage gain came out to be negative. Is this possible and if so, what is ...
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How do I learn to build practical stuff? [closed]
I am in my 4th semester of a 4-year undergraduate electronics rngineering program. All I have learned so far is lots of theory in courses such as analog electronics circuits, digital electronics ...
- 75.3k
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AC RMS from half wave controlled rectifier
I have built the following circuit:
I measured the AC RMS at output as 975.8 mV:
I can't get anywhere close to that measured value when using the AC voltmeter formula below (for delay angle of 90):
...
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6
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MIMO: How Can Two Antennas So Close Together Receive Different Signals?
I'm trying to understand how MIMO (as used by 802.11n wi-fi and some upcoming cellular data standards) works in practice. I understand at least the gist of the theory of spatial multiplexing. What I ...
- 188k
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How do I calculate the transfer function of this basic terminated RC filter?
I'm reading through an electronics book to teach myself, and I'm in the section about filters. I've been following along so far, but now I'm confused about how the author came to a conclusion in his ...
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Amateur question: how circuit analysis methods are applied in "complicated" circuits?
This will sound maybe stupid, but I'm amateur in electronics and I'm in process of learning.
I have previously analysed some basic circuits involving opamps, diodes etc.
Although some circuit looks ...
- 1,245
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Why do people learn electronics? Need some practical examples [closed]
Examples of why one would to learn electronics are:
1) He works (or intend to) as an electrical engineer
2) He likes (or needs to) repair electronic equipment
One thing I find it difficult to ...
- 4,907
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2
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The mean value of phase noise as a stochastic process
What is the mean value of phase noise as a stochastic process?
Where can I get a theoretical analysis of this topic?
- 188k
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1
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Bypass LED with switch (why)?
I have a schematic attached that appears to show a switch bypassing an LED, or the other way around. In the working device operating the switch lights the LED and engages (as in turns 'on' a 'normally'...
- 22.3k
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How to experimentally measure damping in RLC circuits?
I know there are methods to theoretically determine the damping factor and quality factor in RLC circuits. Equations such as
$$\zeta = \frac{R_s}{2} \sqrt{\frac{C}{L}}$$
$$Q = \frac{1}{2\zeta}$$
...
- 82k
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What would be involved in rectifying electricity from a faulty car alternator?
Disclaimer: Newbe
As I understand things:
a car "alternator" generates a/c current
the alternator contains diodes that rectify the current to d/c current
if one or more diodes fail then the ...
- 7,034
2
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1
answer
1k
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The effects of Op amp Bias current
This is regarding an integrator op amp design, the rate at which the input voltage charges the integrator's feedback capacitor is 150V/s. I am trying to justify the minimum feedback capacitor value ...
- 3,674
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Question regarding dielectric breakdown (especially for stun guns)
This question occurred to me after looking at some models of stun guns. What I noticed was that some of them like one I bought had metal extensions sort of like prongs, or like tiny metal cones. I ...
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How to measure resistance with a multimeter?
This may be a very simple question. In my lab guide (I am a freshman Electronic Engineering student), we are supposed to build and analyze a circuit on a breadboard. First, we need to select some ...
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