Questions tagged [diagram]

Plan, sketch, drawing, graph or outline designed to demonstrate or explain how something works.

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What is a good way to convert a multi-output knob to being controlled digitally [closed]

I'm trying to understand a diagram for my thermostat so that I can remotely control the fan speed using a micro-controller. From what I know right now, the best way I can think of doing this is by ...
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1 answer
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What does the circle with the “X” and the cross mean?

I am taking a look at a DSP block for a the Xilinx ZCU111 FPGA and I am getting held up on a simple question. I come from physics so I am not too used to looking at block diagrams yet, but what do the ...
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How can i reverse the direction of this dc motor easily?

How can I easily reverse the spinning direction of the left motor? Thanks
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2 votes
0 answers
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Is there a circuit symbol for an accelerometer?

I use an analog accelerometer in a circuit, but I can't find a corresponding circuit symbol. Is there such a thing, or, where could I search for it besides wikipedia.
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3 answers
325 views

What would this be called and where can I learn more?

So I have a fair amount of experience programming and was thinking hey why not try and write a new controller for my motorcycle (I know, a bold idea) and if not that, at least redo the old wiring. The ...
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5 answers
164 views

Why is the actual position of things in a circuit diagram not considered? What is the type of diagram that cares about the ordering?

After looking at several circuit diagrams and their actual implementation, I found that the position of the parts is not considered in the diagram. Is there any reason for this? If all parts are ...
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0 answers
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Reading timing diagram correctly?

I have the following timing diagram of a SPI communication. Am I calculating total time T for receiving 24 bits correctly? Diagram:
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1 answer
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What does the symbol with the arrow pointing to it mean?

I am looking at the moon rover’s schematics and came across this symbol. I can’t find what it means online. Does anyone know?
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2 votes
4 answers
728 views

Trying to understand this electrical diagram schematic on an AC motor that I have, particularly symbol between yellow and black wires

I'm new to electrical wiring and I'm trying to learn a bit and came across this AC motor which I have that isn't hooked up. I have attached the motor wiring diagram: This is also the wiring ...
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3 votes
1 answer
162 views

PSFB - Asymetric current at the secondary

At the 3rd step of the PSFB cycle, the current at the secondary is not shared equally by the two windings that it would be if it were a full bridge. Does anyone can explain why it is not the case ? ...
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1 answer
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Why does a car body ECU module need to share the ground with the circuit it monitors

I am finding difficulty reading a basic wiring diagram from Bentley for my 1996 E36 BMW. I do not understand why the ECU needs to be connected to the ground. I understand that the trunk lights receive ...
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6 bit sequence detecter with two inputs

I need help with this question: Show the complete gate level design of a state machine with two-bit input (A1 A0). The state-machine should detect the sequence of 01, 11, and 01, on its input. ...
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1 answer
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How to trace and find the clock of a certain USART for this board?

I'm having trouble to trace and find which clocks clock USART2 and USART3 ect for a uC board. I looked at clock tree and block diagram of the board but cannot find a hint. I checked both the reference ...
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Standard / Interpretation of dip switch on diagram

I've managed to get myself thoroughly confused now. Given the following diagram for a dip switch, which way is up / on? Do you read the above as: 1 = On 2,3,4 = Off or as: 1 = Off 2,3,4 = On
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Will this battery bank electrical diagram work as intended?

This diagram is the plan for my van to have a secondary bank of 12 V batteries in the back to run an inverter to power some equipment. Originally my only extra requirement was to make sure the ...
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1 answer
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What are these electric components?

This is a snapshot from a single-line diagram of emergency switchboard drawn in 1984 for an oil & gas project. What are these two components next to the motor symbol? What could ...
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1 vote
2 answers
71 views

How is this ammeter connected in this diagram?

What are the k, i and circle symbols in the red area on this single line diagram? I feel like the ammeter symbol was deported to ...
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1 vote
1 answer
172 views

What is this electric diagram symbol?

What is this electric symbol found on an MCC-related electric single line diagram? It looks like a voltmeter with some sort of resistor but it would make more sense if it was an actuator I think. On ...
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1 vote
1 answer
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What is this electrical symbol?

I'm trying to identify this symbol coming from a 1985 electrical single line diagram (from a marine engineering project). It looks like a closed disconnector switch or a styled fuse maybe? Here is ...
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2 answers
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Audio potentiometer output shorted to ground

I'm working on a schematic where it seems the second pin of a trimmer potentiometer (the output pin) is shorted with the ground pin. This is then fed into an audio output. Is this normal or am I ...
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0 votes
1 answer
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Am I reading this time till trip vs. current diagram correctly

Am I reading this diagram correctly? Top x-axis translates to "rated current for fuse". Bottom x-axis translates to "constant current through fuse in A". y-axis translates to "...
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2 votes
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What's a good resource for learning how to make quality wiring diagrams? [closed]

I'm almost done with my electrical engineering degree, so I understand circuits, but I want to learn how to make good quality wiring diagrams. Not pure "schematics" like you'd do in a ...
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1 answer
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How to read and understand the connections/traces in a schematic?

I am in the process of rebuilding a dell laptop XX327 battery pack. I have removed the outer plastic from the 18650 3S2P battery pack. I plan on replacing all six cells, reprogramming the smart ...
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2 answers
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Help identifying circuitry diagram

Now first and foremost, I know absolutely nothing about circuitry - joined an computer science chatroom and they couldn't help, I have cross referenced the symbols to the internet to try and ...
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1 vote
2 answers
81 views

Is it possible to solve for the resistance of R3 in this question, without knowing the total current of the circuit beforehand?

P.S. I'm not asking for the actual answer, I just need to know how to, so clues or reminders regarding the fundamentals would be fine by me
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1 vote
2 answers
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AT28C256 Page Mode Write Waveforms in datasheet

I read the datasheet for the AT28C256 EEPROM and in the page mode write section there is the following diagram. Where \$ \overline{OE} \$ line is always in the HIGH state during operations whereas in ...
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1 answer
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Can someone help me interpret these diagrams?

I am extremely new to electrical engineering, and I am using it for a personal project. I tried looking into circuit diagrams for a part(a pushbutton), and I don't recognize any of the symbols. Most ...
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1 vote
1 answer
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Vehicle wiring diagram - interpreting symbols compared to actual physical devices

I am going thru my bike's schematic/wiring diagram and going wire by wire I think I'm starting to understand how it works from turning the key onward. But some things are still confusing so perhaps ...
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1 vote
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Practical understanding of "tapping" into vehicle 12V battery / fusebox for power

Disclaimer: I did "tap in" and hooked things to my battery (on my car) many moons ago and did it without really thinking what am I doing, and I was probably doing it in a very hack/ghetto ...
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Reverse polarity of 90 VDC motor with 2 foot switches

I am building a tool where I need to change the direction of the 90 VDC gear reduction motor with two foot switches. Power is coming from a motor controller with variable speed. Terminal 4 and 5 have ...
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What would be the flow chart for this simple state machine in VHDL

Here I have written a small program to clarify my question. I want to see how to draw flowchart for this piece of VHDL code. ...
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0 votes
2 answers
68 views

Identifying components on circuit diagram

I am interested in Linux device drivers development and needed a cheap and tiny USB supporting device that I could control, so that I could write software for both the gadget and the host. I decided ...
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5 votes
2 answers
412 views

Reading an Old Philips Radio Manual with SCR rows

I've been looking at the manual for the Philips L4X26T radio and I have noticed that for each of the diagrams, there is a rather peculiar table with three rows of numbers labelled "S", "...
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4 answers
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How would this transistor diagram be drawn if we draw it with all the closed circuits?

In a book about computers I have this transistor diagram: the first two transistors are p types and the second two are n types. I am wondering how it should have been drawn if we close the circuits, ...
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0 answers
63 views

Calculating effective mass of electron from energy band diagram

How can I calculate the effective mass of electron in the conduction band of silicon with the approximation that they are free, from its energy band diagram by my hand - not software or something else?...
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1 vote
1 answer
190 views

Help interpreting car window wiring diagram

I would be grateful if anyone can help interpret the attached wiring diagram for my 2003 Toyota Camry power windows. The switch for my driver side window is busted so it is currently stuck at down. I ...
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2 votes
0 answers
86 views

Unknown symbol in thermostat schematic - two oblique lines inside a circle

Full diagram: What does the circle with two oblique lines inside it represent? It's an Emmeti Termec thermostat
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0 votes
1 answer
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Interpreting triangles in RC high pass filter circuit diagram

I came across the following image of a RC high-pass filter There is also an initial analysis that says that there is an initial condition for the output voltage that says $$v_O(0^-) = 0$$ which ...
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0 votes
1 answer
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Lines with Circular Terminators and Symbols with Overlines

I'm a newbie to breadboards and Arduinos. I'm playing around with the 74HC595 shift register in order to power a basic segment display to show some numbers. I was looking at the data sheet for the ...
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-1 votes
1 answer
274 views

Software for drawing pictorial electrical diagrams? [closed]

It might seem naive, but I need to prepare some pictorial wiring diagrams for a mechatronic system. Could someone recommend software/platform to use? The example picture below belongs to http://evtv....
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3 votes
1 answer
2k views

Why doesn't this circuit work?

I want to implement this truth table (in Figure 1.1) into a circuit using an 8-1 multiplexer. I did the circuit schematic (in Figure 1.2) in Xilinx ISE Design Suite and it does work, but when I try to ...
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4 votes
1 answer
562 views

How does this tone generator circuit work?

I'm an electronics newbie who just started experimenting with the Snap Circuits style kit and I came across this high-frequency oscillator circuit. When I put it together, I hear a middle to high ...
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0 votes
1 answer
53 views

ADNS-5050 components needed

I'm planning a project involving the ADNS-5050 optical mouse sensor package. The data sheet for this package says that it needs to be combined with 4 capacitors, and it has a diagramme that I think is ...
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0 votes
2 answers
1k views

Wiring in Thermostat (Rittal 31100) as a 24V Temperature Switch

I want to wire in the following thermostat. https://proax.ca/en/product/205417/RIT3110000 And am having a hard time understanding the wiring diagram I think I get that 5 is L and can be connected to ...
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0 votes
2 answers
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Flip-flop with numbered inputs

On page 3 of the datasheet for the SN74LS597 IC, I have found the following diagram: Notice that the flip-flops have some numbered inputs (1D and C1, 2D and C2, C3 and 3S/3R) and some simple inputs (...
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2 votes
2 answers
89 views

Weird schematic with MOSFET bulk connected to some negative terminal

I found a circuit diagram, which I do not understand. In the diagram below, I bounded a peculiar terminal with a red box. The bulk of m3 and m4 MOSFETs are connected to this negative terminal. My ...
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0 votes
1 answer
61 views

Interlock diagram troubles

The drawing seems to present an electric interlock system. But how the NO and NC relays being energized? The diagonal with a box should represent fuse, but the drawing doesn't seem so? BCT should be ...
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5 votes
2 answers
1k views

What's this on a single line diagram? What's its function?

The unknown part: It seems like a regular transformer, but is it? What's its function? Why is it grounded? The diagram itself:
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1 vote
1 answer
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Drawing equivalent circuit of transformer to determine its parameters

For part a, I considered the following model of the transformer where v1 = 230 V, representing the low voltage side. For part b, I used the same model, with the right hand side short circuited rather ...
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Current and voltage complex diagram for a transformer

I was wondering how would a complex diagram for current and voltage look both for an ideal transformer and for a fully coupled lossless transformer. The diagram for a coil looks like this: The ideal ...
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