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Questions tagged [engineering]

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0
votes
1answer
52 views

Ideas to detect when someone is trying to detach an object firmly attached? [closed]

I'm designing a tracker for assets. I want your suggestions to implement into the circuit a method to detect when someone is trying to remove the tracker. I was thinking of surrounding the board with ...
1
vote
1answer
52 views

Bjt circuits, “Vbe = 0.7 at edge of conduction”

could you explain what "eoc" and" eos" (edge of conduction and edge of saturation) is? The problem says "Vbe = 0.7 at edge of conduction" , is that in cutoff mode?
0
votes
1answer
40 views

In which branch of engineering can I learn about display technologies like LCD, LED, OLED? [closed]

I am finishing high school this year and want to pursue a career where I can learn and develop display technologies like LCD, LED, OLED, and flexible displays. Can somebody please tell me what branch ...
10
votes
2answers
3k views

Why does the current not skip resistors R3 and R5 when R6 and R4 have no resistance?

I do not understand why the current still flows through resistors R3 and R5 when R6 and R4's resistance is 0. To me, it would seem that the current would skip R3 and R5, however the answer key says ...
0
votes
4answers
421 views

Is electrical designer same as electrical engineer? [closed]

A job I'm interested in has a title of "electrical designer". The qualifications are either a Bachelor of Engineering or Electronics Engineering Technology. Is this not an Engineering job? ...
0
votes
1answer
58 views

Assemble Peltier Cooler to Li-poly Rc Battery

I have procured a thermoelectric cooler (TEC, this one) and my purpose of the TEC is to produce current for the Li-poly RC battery to increase its battery life. The Li-poly RC battery has 7.4V stated ...
0
votes
1answer
75 views

How do I convert 1/3 to signed float 8 bit?

The formula is as follows: (-1)^[signed bit] * (1.[significant bit]) * (2^[excess bit -3]) or (-1)^[s] * (1.[f]) * (2^[x-3]) It is a question posed by my signals and systems instructor, hence the ...
0
votes
3answers
62 views

Alternative to alternating relay? or help?

I'm using a littelfuse relay shown in the link to switch motor directions. I'm sending a pulse to the relay switch of 0.02s in order to switch between the L1 and L2 contacts. The pulse seems to be too ...
1
vote
1answer
46 views

What is the relationship between Ground Potential Rise (GPR) and Source Voltage?

I am looking at the results for an earth grid study for a 50Hz substation. Primary Voltage (Vp) = 11,000V Secondary Voltage (Vs) = 415V Secondary Fault Current (If)= 24kA Secondary Grid Current (...
1
vote
2answers
219 views

Detecting Open Circuit, Short Circuit and Battery Reversal

I am facing various design challenges with a project that I am currently working on. I've been trying to figure out a way to build a circuit that detects open circuit, short circuit, and battery ...
4
votes
1answer
105 views

MOSFET: How can I find conduction parameter and transconductance based on graphs?

So I have my graphs (below) with various MOSFET characteristics. I don't know device dimensions or geometry, therefore I can't solve for the 2 directly with an equation. Otherwise I would just do that....
1
vote
2answers
89 views

Does this look like a correct Bandpass filter?

A project task assigned me to make a simple series RLC bandpass filter with values B = 73kHz & freq center = 4.8MHz known. I use equations B=R/L and fc=1/(2pisqrt(LC)) to get the RLC values. ...
1
vote
2answers
166 views

Advice for 25-50 Mbit SPI lines - PCB design

I would like to ask some advice for my layout design. I am working on a layout design. The designed PCB will be a Beaglebone Black (BBB) extension card. It is a four layer PCB with the following ...
0
votes
3answers
79 views

Is a normally high switch the same as a normally closed switch?

I'm very much an amateur when it comes to electronics so apologies for the stupid question. I have a switch that is normally high (5V) and then when i hit the mechanical button it drops to 1V. I need ...
0
votes
1answer
42 views

Where does the indicated negative voltage terminal lie on this circuit?

Does the negative voltage terminal lie after the 150v source ?
0
votes
1answer
22 views

How to get the Forward voltage of a tachometer?

I am currently in the process of building a circuit board for components that I am going to use on a lathe. I want to use this tachometer. https://www.amazon.com/dp/B00VKAT8A2/ref=...
2
votes
0answers
101 views

Identify this circuit symbol with two overlapping circles [duplicate]

I came across some images of schematics and have never seen this component before - what is it?
1
vote
0answers
76 views

What is the definition of hull voltage?

I'm studying the subject Electrical Safety in Engineering and a special term really drew my attention. When I tried to google it, no any option was suggested but hull protection. In the presentation ...
2
votes
2answers
48 views

Connector type suggestions required for 12V supply

I made a power supply enclosure with a mains switch and now I need external DC connectors to be mounted in the slot shown. I want to mount two female connectors onto a 3D printed panel, that will sit ...
0
votes
2answers
68 views

Engineering approach to choosing a motor, voltage and gears

I am working on a project to automate the opening and closing of my venetian blinds at home, by attaching a motor with an H-bridge to them. I started with a practical trial and error approach to it. ...
4
votes
2answers
515 views

Capacitor and inductor working principle

I want to know that there is opposition mechanism of current in inductor say back emf than what is opposition mechanism of voltage in capacitor ??? And also want to know that when inductor suddenly ...
0
votes
1answer
52 views

Can the TFT in LCD displays be made in the nanometer range?

Can the TFT elements and hence the pixels in an LCD display be made in the nanometer range? Say 10nm x 10nm?
-1
votes
1answer
49 views

Toggle between two leds [closed]

I am designing a circuit with not a lot of knowledge in electronics and I am close to finishing it. The finishing part remains. So, I have got a logic 1 or 0 from comp op amp and based upon that one ...
0
votes
1answer
59 views

Reverse engineering, doubt with value of capacitor

I want to do reverse engineering of this module (Digital Microphone) First of all I tried to get the schematics from the supplier but they don't have them. Finally I starting unsolder each capacitor,...
0
votes
2answers
175 views

Where to have PCB with microcontoller designed? [closed]

I’m involved in CNC milling/manufacturing/prototyping, a product we are designing needs an electrical interface that controls timing and dwell on 2 solenoids. This is something well outside of our ...
0
votes
2answers
79 views

Current measurement in a SoC

I have to measure the current flowing inside a SoC through a multimeter. In the board schematics, I found that the SoC provides a structure to measure the current: Now, I should connect them with a ...
0
votes
0answers
31 views

What is the diffrents in below MOSFET circuit considering control circuit?

What is the different in below MOSFET circuit considering control circuit? What is the charge pump involving ? Is it required charge pump for the both the circuit?
0
votes
1answer
45 views

Finding Magnetic Flux

I'm hoping someone can verify an answer I have found for the following problem: A helmholtz coil consists of two identical circular wire loops placed coaxially. If each loop has radius a and carries ...
0
votes
1answer
320 views

Can anyone please help me with this ETAP Project?

I'm trying to run the load flow study, but instead I'm getting this error. Error 101-01: [Bus 2] Bus base kV is out of 40% range from bus nominal kV. Error 722: [XFMR 1] 2W transformer secondary kV ...
2
votes
1answer
133 views

Transformer rectifier set. A question about the schematic diagram

This is a high voltage transformer (53kV) and rectifier that is used to power an Electrostatic Precipitator. The schematic shows a jumper between terminals H1 and H2 with a label "Remove jumper for ...
2
votes
0answers
45 views

What are (if there are any) the major applications/implications of relativistic electrodynamics in engineering? [closed]

I was wondering about the relativistic and covariant formulation of classical E&M and Maxwell's Equations. Does they have any major implication in engineering (not exclusively talking about ...
0
votes
2answers
2k views

AC RMS and DC average voltage

Imagine we're trying to get 120V output. For AC, we must have a source with a peak voltage of 169.7V to achieve an RMS voltage of 120Vac. (169.7V * 0.707). For pulsating DC, whether rectified by a ...
0
votes
1answer
102 views

Can you please help me identify these components and state their function?

Can you please help me identify these components and state their function? These were taken from the inside of a digital thermometer.
4
votes
2answers
960 views

Motor that allows threaded rod to pass through

Is there a motor that can travel linearly up and down a threaded rod. I already know that you can attach a motor to the end of a threaded rod and make a nut travel along the threaded rod but this is ...
0
votes
3answers
383 views

Joining high current wires

I am trying to figure out the best way to join some 12 gauge wire that will be carrying very high DC current (about 100A) for about 2 seconds. When working with lower currents, soldering seems to be ...
-4
votes
2answers
298 views

choosing an Engineering degree for embedded systems and IoT [closed]

I am applying for university right now and I am wondering which engineering degree is better for working on embedded systems and IOT: "Computer engineering" vs "electronics and communication ...
-7
votes
2answers
325 views

Electrical Engineer being autodidact (Without university) [closed]

for personal reasons I can't go to the university and i would like learn a lot of electronics oriented to computers, I am not new in the software programming but in all related with the hardware yes, ...
-3
votes
1answer
134 views

Double batteries capactior circuit

Can anyone help me solve this problem?