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Hello, I am engineering student in Turkey.
Our teacher gave us a homework. I took care of all but this question. But I couldn't do this question. It is very complicated, I just could not put it in my mind. Can you help me?
I just found old flashlight and due to inability to use any of the new batteries I decided to create new one from 4xAA batteries (NiMH aku AA;1,2V/2000mAh Panasonic "Eneloop").
I created simple circuit and used old flashlight switch in it. It works just fine. Then I added DC charging...
Hi, I'm new here, I've just started a project that has me building an electrical circuit for the first time and I don't really know what I'm doing! I'm hoping someone can answer a quick question.
I have a 12v electric motor (has two power levels, at 9A and 20A and it was suggested to go with a...
I have 12x 3mm LED's:
- 6x flashing
- 6x static
To this I have a standard slide switch and cell battery holder.
My issue is this: how do I link these 14 components to one another and ensure the flashing LEDs stay flashing and the static, static?
I believe that a 6V battery will...
Research the ability of PLC's to communicate via 4-20mA and 0-10volts between the laboratory devices and the PLC
This would include how to communicate between these devices using an analog device that has 0-10 volts and converts to 4-20mA.
Guys, I need some help.
I need to build a circuit, that flashes a LED 4 times (only 4x, in a short time, like less than 1/2 second), every time that i click a bottom (click switch).
If you can draw me a circuit that may work, I'll be grateful (cuz I'm still learning circuits).
In a tutorial about h parameters of a two port network I find the below snippet unable to grasp. According to KVL, the total voltage in a loop is the algebraic sum of the individual voltages. But why in this tutorial ( equation 1 in below image ) it's given so. It should be something like V1 =...
I'm in an introductory EE class and I was wondering, if the dependent variable of a dependent current source is zero, does the dependent current source become a short circuit or open circuit?
Thanks for the help.
I'm working on a problem here where I believe one of the steps uses voltage division to find the voltage across the 10ohm resistor. However, that's not how the solution found the voltage across the 10ohm resistor.
I was trying to find the voltage across the 40ohm resistor first and...
I am currently working with an AC Integrator and have a square wave as my input while my output is a triangular wave.
I am confused why the triangular wave has a decreasing slope when the square wave is at +4V. I believe it has something to do with the area under the square wave...
I want to make an auto relay timer circuit such that it turns on the load connected to the relay for 2 min then turns off for 10 min and repeats this cycle indefinitely.
I have a few 555 timer lying around was hoping if could make something out of it. The timings doesn't needs to be...
My college professor asked us to take a real life problem/device and design and solve its circuit using transient response and Laplace transforms. It has to be a simple circuit, maybe just some capacitors, power source, switch and resistors... My biggest problem is finding a connection to a real...
As part of a broader project, I am designing IC circuit using CMOS to one of the first steps I'm working on is the filtering a series of pulses with of the noise. The actual pulses are around 1 kHz so I am implementing 2nd order sallen-key high pass filter. Since the capacitance is limited to...
There is the code
vbias 3 0 dc 5v
vs 1 0 dc 0v
rb 1 2 20k
rc 3 4 2k
q 4 2 0 mynpn
.model mynpn npn (BF=175 IS=1e-17 VA=75 BR=2)
.dc vs 0 5 0.5
.plot dc v(3) -i(vbias)
But the output is showing a negative going down. How to get the graph of the plot with this app called...
The code is here,
Diode Voltage Drop
r1 1 2 10k
r2 2 3 5k
r3 3 4 4k
r4 4 0 3k
vin 1 0 dc 10
.print dc v(3,2)
As you can see I am trying to get a voltage drop between node 3 aand 2. But the print function is not working properly. It is just showing the usual outputs of( the ouput is...
I am trying to build an escape room puzzle, where someone holds a key fob up to a sensor and a maglock opens, and I went online to buy something that I assumed was ready-in-box but instead they sent me the photo attached which I'm 99% sure was originally a car immobilizer and is now being used...
Simple LED circuit doubt.
Assume : I have a LED with forward voltage of 3.0 V and forward Current of 350mA.
With 9V battery, i would be calculating the required Resistance with the Ohms law :
R = ( Source Voltage - Forward Voltage) / Forward Current.
Here we dont consider the Current Ouput...
Hello everyone, I'm working on my thesis and came to a point where I can't interprete a part of a circuit I'm using.
This should be an adaptation circuit, so I am guessing it's filtering my signal in some kind of way, but cannot say with certainty which kind of filter should it be.
I could say...
Hello good people,
I need help. I'm posting a schematic of an ultra low noise amplifier. It is to be powered by batteries. For that reason, I need a stable DC solution in the place of R4 resistor. I was proposed to achieve that by using another JFET and an integrator circuit, but I am not...
Hello everyone, this is my first thread here.
I am using a 60W soldering iron which has a temperature regulator on it. I have never seen anything like this. Also this iron has a ground crockodile clip which saves me from the unnecessary shocks.Also it is automated. It turns off/on all by itself...
Hello. I am an electronics beginner. I would like to understand a circuit that is in a book from the 1980s entitled "Computer Controlled Robots", published by Usborne. May I ask here?
1. The book does not specify the exact model of relay to be used, merely that it should be within certain...