Questions tagged [diagram]
Plan, sketch, drawing, graph or outline designed to demonstrate or explain how something works.
195
questions
20
votes
8answers
7k views
This LM317 diagram doesn't make any sense to me
So this is the basic wiring for an LM317 as a voltage regulator, and very little of it makes sense to me. First off, if one pin is for my adjustment, why do I need \$R_1\$? \$R_2\$ will give me just ...
0
votes
0answers
29 views
BJT - How does an applied voltage at BE and BC affect the band diagram?
Let's say we have an energy band diagram of a BJT at equilibrium. Then, we apply -0.7V to BE, while 0.7V is applied to BC.
How will these voltages affect the band diagram? I would appreciate it if ...
1
vote
1answer
92 views
Arduino Vehicle Remote Start
I am really intrigued in the idea of designing a remote start using an Arduino and Bluetooth connectivity.
I plan to wire a relay to the starter switch of a motorbike. I have chosen to do it this way ...
0
votes
2answers
90 views
What is the triangle components in this diagram?
I am reading through datasheet of a voltage translator for I2C (FXMA2102) and I cannot understand the triangle components in the block diagram:
Are they diodes to make current flow in one direction? ...
1
vote
1answer
37 views
How can I draw the diagram using few decoders for this truth table?
For the truth table above, abc is the input and xyz is the output.
I do know how to draw the diagram using a decoder in case of when I have only one output.
How can I draw the diagram using a decoder ...
-5
votes
1answer
61 views
In need of wiring diagram [closed]
Could someone link me a simulated circuit wiring diagram for the following circuit: DPDT switch (6 terminals), 2 limit switches,battery pack, motor? I don't have any wiring diagram software.
1
vote
1answer
73 views
Is there a standardised noise source symbol for circuit diagrams?
Does anyone know of any standard symbol for a noise source, for example of one wants to represent the Johnson-Nyquist noise, what is best to use?
1
vote
1answer
101 views
SRAM-Logic Block Diagram
I am a beginner and I am trying to understand the block diagram of a Static RAM. I want to draw a "256x4 bit SRAM" block diagram. According to some information I collected from the internet I managed ...
0
votes
2answers
121 views
Butt splice electrical symbol
I'm making a detailed electrical diagram which needs to include splices. From researching on Google I couldn't find the conventional symbol for a butt splice, or even a splice, in an electrical ...
1
vote
3answers
178 views
Raspberry Pi Super Capacitor On Battery Loss
I am looking to provide power to my raspberry Pi upon power loss from 5v power supply. It just needs to provide power long enough for the Pi to safely shutdown (with the setup I have, I am estimating ...
0
votes
1answer
57 views
How to diagram power-side and ground-side switches?
I'm an early-stage self-teaching hobbyist.
Just as a practice exercise I'm diagramming simple circuits (without looking at the instructions) of DIY kits that I've bought on banggood.com (awesome ...
3
votes
1answer
44 views
What's the circuit diagram symbol for a variable reluctance sensor transducer?
I know I've seen the symbol before, it's something like a circle with an open triangle facing in the direction of current flow with a line through the middle. I'm specifically thinking of the ...
0
votes
1answer
112 views
Fan speed control with resistor
Electrician from Australia here. Just having an issue with a heater fan in a bathroom for a client. According to the diagram I have posted, I can wire a second fan up to this and it should all work.
...
1
vote
0answers
44 views
Schematic diagram probe question
I am not sure whether to call it a probe on my schematic diagram or is it something else.
I have ATmega328P checking its two digital pins whether both have been connected to the ground. When floating,...
0
votes
2answers
121 views
MOSFET Power Supply Explained
I am struggling to understand how the jumpers at the bottom of this diagram change the voltage of the circuit in this diagram. The input J1 is a 9V wall wart.
By my understating the MOSFET only ...
0
votes
1answer
125 views
unknown circuit symbol rectangle with arrow
I've never seen this symbol before but my wiring diagram is full of it. I also have searched for lists of symbols but it isn't among them. Does anybody know what is is? It is from my wiring diagram of ...
2
votes
2answers
110 views
What is the best/safest way to wire a 200V fan in the USA, using 120v or 240v? [closed]
I bought a surplus fan/HEPA filter unit for using in a clean room. The wiring diagram is here.
I want to connect it to a power cord and plug it into the wall. I know basic electric, but I'm not sure ...
0
votes
1answer
206 views
Why are latches level triggered and flip flops edge triggered?
I know what it means to be edge or level triggered but considering the block diagram or logic diagram of inside of latches and flip flops I cannot see what inside them specifies this property of each, ...
0
votes
1answer
42 views
How do you reduce this simple system diagram for the sake of doing algebraic manipulation?
My guess is that since H(s) is parallel with 1(s) we'd do A(H - 1)? But this is my first ...
0
votes
1answer
125 views
A beginner that could use a few tips on wiring my first circuit involving relays
I am in no way experienced or knowledgeable with circuits or electronics passed installing my own car subwoofers and amps, or swapping out pickups on a guitar which means I only basically know how to ...
1
vote
1answer
338 views
Zero crossing detection circuit correct?
I am working on a DIY AC dimmer circuit with arduino.
This project is part of the AC dimmer circuit as mentioned here
Since, I was stuck in so thought of retracing my steps and checking each part of ...
0
votes
2answers
45 views
Difference between low signal and no signal for a SR latch?
I am struggling to understand how the SR latch works.
When an input has designation 0, this means "low signal" correct? Is this completely different than "no signal"? Doesn't a logic gate need some ...
1
vote
0answers
50 views
What is the meaning of the first gain in the block diagram?
I have do design a circuit based on the block diagram below. I know how to design the PID part but I don't understand what the K=2 is. For the PID I have made the following:
1
vote
1answer
119 views
Calculate radiation power of an antenna in respect to a given antenna radiation pattern and a given angle
I work on a program that simulates the wave propagation of high frequency electromagnetic waves (2.4 or 5 GHz Bands) in 3D. I use a ray launching approach, where the emitted rays approximate the ...
2
votes
1answer
143 views
Understanding how current is 0A in secondary circuit of this potentiometer - misprint, or am I dumb?
I'm learning some basic electronics, and I'm using an old textbook (Basic Electronics for Scientists, Brophy, 1966) to wrap my head around some fundamentals.
At the moment, I'm looking at ...
0
votes
0answers
1k views
Wiring Diagram Software for Open Source Projects
So, obviously, there are plenty of CAD software options out there for hobbyists and open source hardware folks to do PCB schematic capture and layout.
However, I'm having a really hard time figuring ...
-10
votes
3answers
172 views
Is it possible to request a mapped diagram of electricity usage from your provider? [closed]
Whenever I see our electric bill, it just shows the amount owed, and the amount used (in kWh).
However, it would be really nice if we could request or pay a premium per month, for a service that ...
7
votes
3answers
476 views
Block diagrams can be different and still works for the same system?
I am an telecommunications engineer who is working now as a programmer. At university we took a class on digital filters, Laplace transformation and working in the frequency and time domain. At the ...
1
vote
1answer
91 views
Transfer function of a System Diagram
I would like to have some help on this system:
I have to consider that all initial conditions at t = 0 are null. I've tried some things and I have some answers but I don't know if they are true. ...
3
votes
2answers
171 views
How does the diagram really work? [closed]
Good afternoon, I am a high school student and in my scientific fair project, I would like to do an experiment about wireless energy.
I want to implement the resonant inductive coupling.
According ...
0
votes
1answer
60 views
Confusion with interpreting a functional safety diagram of a motor driver
I have a problem with interpreting the functional safety diagram of a servo motor driver. It has a long manual here but I will present the parts I'm stuck at. The minimum basic requirement for safety ...
2
votes
1answer
81 views
What does this logic/circuit symbol mean [duplicate]
While browsing through the datasheet of an ATMega324p description of a pin I noticed this symbol which looks like four diodes/triangles pointing at each other.
So my question is what is it actually?
0
votes
2answers
46 views
Standard for document in diagrams the power of motor
One machine supplier shipped us a motor with a power in its plate so different (800 kW) to the one indicated in the electrical diagrams (500 kW). We calculate the wires using the diagrams information ...
0
votes
2answers
131 views
what size/kind of capacitor is needed 12VDC automotive
I want to have a light bulb as a daytime running light that is located next to the turn signal (blinker). Since that daylight running light is kind of bright (having a clear lens) I want it to turn ...
0
votes
1answer
60 views
First or last value checker component/funtion [closed]
I am trying to make a circuit that can store the first and last value from a series of values. To do this I'm guessing I need a component to determine if it's the first or last value and this is what ...
3
votes
3answers
108 views
Finding the average and RMS value of this signal
How can I find the RMS and the average voltage of the following diagram?:
My work:
The RMS:
$$\sqrt{\left(\sqrt{\frac{1}{3\times10^{-3}}\int_0^{3\times10^{-3}}\left(\frac{5000}{3}\cdot t\right)^2\...
2
votes
2answers
133 views
How to Redraw or Interpret This
I am really stumped at this:
I've been mulling this over my head for literal hours. I am pretty sure there should be 4 currents, because there are at least nodes with 3 parallel resistors. I just ...
1
vote
2answers
137 views
Iterative simulation of RC low pass filter, strange correction required
To get further understanding in how iterative simulators work, like circuitJS for an example, I decided to make my own of a simple RC low pass filter.
The voltage I am interested in is the one across ...
0
votes
2answers
107 views
Ideal Voltage/Current Source Circuit Analysis
I am trying to understand what it going on in this circuit diagram and how to go about solving this problem. I am told to find Vx given that the current in the central wire is zero. Does this mean ...
0
votes
2answers
5k views
How many flip-flops are required for the implementation of this Mealy diagram?
I'm trying to create a circuit diagram that corresponds to the Mealy diagram I created for the following problem, but I'm not sure how many flip-flops I should use.
Problem:
A data stream receives ...
2
votes
1answer
86 views
How to interpret diode diagrams
I was reading about the types of diodes, including those that can be used to generate microwaves, and I found myself confused about the material I found on it. This link discusses the differences ...
0
votes
2answers
3k views
SR latch timing diagram or waveform with delay, help!
I'm having trouble solving these two problems (my solution and general solution showed):
What I did was follow the truth table and based on the combination on the graph draw the appropriate state ...
1
vote
2answers
161 views
Parallel resistors, why? (Basic electronics)
I'm curious as to why R1+R3 is parallel to R4 and not R2? could someone please explain this to me.
What rules are R2 violating that makes it non-parallel (and what makes R4 parallel)?
Thanks.
What i ...
4
votes
1answer
3k views
How are terminal blocks depicted in a wiring diagram?
I have started to document the electrical system in a custom machine that we own. I'm using TinyCad for the schematic and that's working OK. I also want to create wiring diagrams to represent the ...
0
votes
2answers
286 views
What do scissors mean in a diagram?
I'm trying to wire an immobilizer bypass for a vehicle remote start, but I have never seen scissors in a diagram before. Anyone know what this means?
1
vote
1answer
232 views
Don't Understand the Notation on this State Diagram
This like a simple question, but I can't find a clear answer anywhere. Basically, I am used to seeing and implementing state diagrams that look like this:
Where the output and input are in this ...
2
votes
1answer
300 views
Why measure potential with a three winding transformer?
I have a single line diagram where it's shown that the voltage is measured with a three-winding transformer on the busbar (22kV), and two-winding transformers on the feeders.
I've seen this on many ...
0
votes
1answer
53 views
Form differential equation pair from discrete time system block diagram
I have a discrete time system block diagram.
And my question is what is the output y(k)
I managed to get what is V(k)
$$V(k)=\frac{1}{2}*V(k-1) +U(k) $$
But now i can't form y(k) because ...
1
vote
1answer
201 views
What is the red-outlined white square that contains a red dot in this diagram?
I'm new to circuit design and reading schematics but have a little familiarity there. On this diagram which shows a circuit built on a strip board, I don't quite understand the meaning of the red-...
5
votes
1answer
442 views
What do decimal/alphanumeric suffixes after a slash mean in a schematic cross-reference?
I'm looking at a circuit diagram for the ChipWhisperer, which is a tool for power analysis and glitch attacks. You can grab the full circuit schematic as a PDF, but here's an excerpt:
What do those ...
