Questions tagged [circuits]
Use for questions primarily about circuit design, components, testing or other practical applications.
21
questions with no upvoted or accepted answers
5
votes
1answer
389 views
I want to understand this pneumatic circuit
I have trouble understanding the following pneumatic circuit diagram:
I am new to reading circuit diagrams and i am unfamiliar with some of the symbols. I would appreciate if somebody could explain ...
2
votes
0answers
25 views
Electrical component most likely to fail in window AC unit after power surge?
I have a window AC unit, 115 VAC, 10 amps. Power went out earlier in the week due to the big storm on the east coast and once it came back on every LED on the control panel was lit (not typical) and ...
2
votes
1answer
102 views
Can I connect a power supply main (SPH) and inverter main (SPH) with common neutral to a TP MCB?
I have limited knowledge of MCBs and just doing research to secure my kitchen.
I want to connect my power supply main and inverter main with common neutral to a TP MCB. This MCB will be placed in the ...
2
votes
0answers
45 views
Comparisons of multiplier circuits
Could someone please explain some of the advantages/disadvantages of the wallace multiplier circuit vs a shifting and adding multiplier circuit vs an shift register multiplying circuit? We went over ...
1
vote
0answers
18 views
Transferring the project from “Altium Design” to “SolidWorks” while maintaining silk-screen printing, sizes and everything else
I want to transfer the PCB project to solidwork from altium design, I read forums on how to do it better, and so:
Save to STEP. The option is good and working, but I did not like the option, since ...
1
vote
0answers
37 views
Overcurrent protection, limit for nominal current or stall?
Background: I'm currently working on a robotics design that will drill through soil.
I have selected a 48V motor who's nominal current is 3.17A and has a stall current of 42A. I will be driving the ...
1
vote
1answer
68 views
BJT Output Characteristics Question
Ok, so I am pretty confused at the moment with a question that I have been given to work out by my lecturer and was wondering if I could get some guidance with it. I will attach images of the question ...
1
vote
0answers
18 views
Calculating the water pressure knowing the circuit that tracks it
I'm not very good at physics, but I've got a problem that I really need to solve.
On the second picture you can see a pipe with flowing water. The point of this mechanism is to lit a LED whenever the ...
1
vote
2answers
107 views
Designing a loaded voltage divider?
I was wondering how to design this circuit in depth, since I have no idea what to do.
1
vote
1answer
63 views
How to choose type of output from a water level switch?
I need to buy a level switch for a quench tower water drainage system. I intend to use its output directly to open a solenoid valve to drain the tank when the switch detects water and close it ...
1
vote
0answers
37 views
How to prototype this circuit using an Arduino and breadboard?
I'm trying to build this circuit for a force transducer such that the data is logged by an Arduino Uno. I have the op-amp recommended in the schematic, but I haven't been able to get stable readings ...
1
vote
0answers
70 views
Mosfet switching circuit
I am trying to make a MOSFET switching circuit where its gate input is 12V clock pulse. Now when I put the load between (Vdd) and (Drain), there is no drop voltage VDS, but when the gate input falls ...
1
vote
0answers
210 views
Calculating gain of an overall system. Analogue electronics
Our professor has given us a review for a upcoming exam. But he has never done anything like this question and it has stumped a quite few of us. We are hoping someone can walk us through this so we ...
1
vote
0answers
134 views
What are the various lumped element dynamic system models called?
What are the various lumped element dynamic system models called? By lumped element dynamic system models, I mean the various nodal models comprised of things that look like capacitors, inductors, ...
0
votes
1answer
16 views
How to make a wireless modem using a normal Wi-Fi router and a 4g usb modem
I have a normal TP link (Model: TL-WR841N) router and an USB 4g modem. But the WIFI router does not have any USB port. I want to connect the USB modem with the router, want to share internet ...
0
votes
0answers
12 views
Thermoelectric cooler parasitics
So I'm looking at performance curves for thermoelectric coolers, and it seems like these curves are so misleading as to be useless unless I'm missing something fundamental.
Suppose I have a ...
0
votes
0answers
22 views
RLC circuit problem
After the switch is open for a long time, it is closed at t = 0.
How can I find iL(t) and Vc(t) for t>=0?
I tried step response for RLC circuit but I could not apply.
0
votes
0answers
30 views
IP grade for specific plastic case
I´m designing an access control device and I need to place it in a plastic case so it can be easily installed on a wall, for example.
Also, the PCB will have a special coating for humidity protection.
...
0
votes
0answers
37 views
E-Lock Circuit Help
For school I was assigned a madlab circuit, E-lock, to build and explain how it works, and to be frank, I have no clue how it works. I was able to build it and it functions as it is suppose to: using ...
0
votes
0answers
38 views
Is my understanding of the roles of transistors in this circuit correct?
THE CIRCUIT'S FUNCTIONING
This circuit is a rain water sensor circuit that buzzes when there's water on a probe.I found it on net.1
CIRCUIT COMPONENTS
3 Volts Battery
BC 558 Transistor(PNP)
BC 548 ...
0
votes
0answers
26 views
Confusion about 2-bit adders
I am a little confused about how a 2-bit adder works. For 1-bit adder, my understanding of it is fine and I am able to draw out the truth table for it. However, if lets say I have a 2-bit adder, I can'...
