Plan, sketch, drawing, graph or outline designed to demonstrate or explain how something works.
0
votes
0answers
76 views
Non-Ohmic Internal Resistance
How would a non-ohmic internal resistance to a battery change the voltmeter reading in this (hopefully correctly drawn) diagram?
0
votes
2answers
59 views
How to determine which topology a BJT is configured to from a given circuit diagram?
As far as I understand, a BJT in any given circuit must fall in exactly one of the following configurations:
-Common emitter.
-Common collector.
-Common base.
So my question is:
Are there any ...
7
votes
2answers
138 views
Trying to understand how a guitar pickup switch works
At the risk of being off topic, I need to ask a guitar electrical question.
I am trying to replace an old guitar's pickups (including the pickup switch). The idea is to put two active humbuckers. ...
6
votes
2answers
101 views
How does a hair dryer change its motor speed? Diagram included
I'm working on a side project where I need to figure out how a hair dryer works...so I took apart a hair dryer and made a circuit diagram (below). I am much more mechanically inclined than ...
17
votes
5answers
3k views
What does “Piggy” mean in this Schematic?
What does the word "Piggy" mean in this schematic diagram?
I found some sections of a schematic where a part is denoted as "Piggy".
What does it mean?
-1
votes
1answer
64 views
Help with son's 18 V car [closed]
I need help with the wiring on my son's car.
I'm trying to run 2 x front and 2 x rear #QG550 12 V 45rmp motors using independent 18 V power supplies, 18 V front and 18 V rear.
I wish to keep the ...
0
votes
0answers
21 views
HSPICE code for eye diagram
Here's the code I used in HSPICE in order to see the eye diagram of a transimpedance amplifier (TIA) in an optical receiver:
...
0
votes
1answer
31 views
Feedback Control: Unexpected result for block diagram simplifications using matlab
I made some simple calculations regarding block diagram algebra. The problem is that I don't get the same result using matlab.
Here is the system with it's corresponding blocks:
$$H_1 = z+2$$ $$H_2 ...
1
vote
2answers
55 views
Why are there high active and low active signals in a timing diagram?
I always see such signals (colored in the image) in a timing diagram. Now I've figured out that they're called:
low-activ and for me an OR-gate
high-active for me an AND-gate
signals.
But why ...
2
votes
2answers
105 views
Does a switch schematic symbol have a conventional “polarity”?
I'm studying Rudy Severns eBook Snubber Circuits for Power Electronics; great read by the way.
In it he has the following figure, notice the phrase in the caption "including voltage and polarity ...
3
votes
2answers
78 views
Why is this a Moore and not a Mealy FSM?
Can someone please explain how I can tell which FSM type I have? In my textbook I read that output in a Mealy FSM is based on both the input and the present state, but in a Moore FSM it is based only ...
5
votes
2answers
182 views
Drawing current sensing transformers accurately
This is more of a stylistic question than anything else, but it important that the sketch be accurate to convey what is really going on. I'm wondering, how does one draw a current loop that is ...
1
vote
0answers
45 views
Where am I going wrong with my datflow diagram?
I am trying to make a dataflow diagram of this:
Here is what I have so far but it doesn't seem right:
Where am I going wrong with my dataflow diagram?
1
vote
1answer
79 views
Signal Flow Diagram for a biquadratic section
I'm doing a theoretical preparation for an Electronics laboratory. This laboratory is about Tow-Thomas biquadratic section which can be represented by the following circuit:
The first thing that is ...
1
vote
2answers
105 views
AND gate with a single input in a diagram
consider the following diagram:
http://ee-classes.usc.edu/ee459/library/datasheets/DM74LS181.pdf
( page 3 )
The first AND gate at the top left of the schematic has only one input! What does this ...
0
votes
1answer
1k views
How do you calculate the total power developed in a circuit?
The figure below shows a circuit with 6 elements
This table show the values for the currents and voltages in the circuit.
While it's clear that you need to sum the power dissipated for a subset of ...
1
vote
0answers
69 views
Understanding timing diagrams + setting the Flash Wait States number in ARM
I'm trying to understand the Flash wait states which are configurable in my AT91SAM7X256. I have this basic project, and in the startup code the Flash Mode Register is set to provide 1 additional ...
0
votes
1answer
121 views
How to draw the input into the VCC net/bus in a circuit diagram?
I am currently drawing the circuit diagram for a device. To simplify the diagram I already using the ground symbol for all pins which are connected to ground. This makes the diagram much more ...
0
votes
2answers
283 views
Can a Magnet power a fan for a wind and electricity output?
can it really be possible to power a ceiling fan with the use of magnets and could give you a wind and electricity output? how to do it? (For Remote Areas Without Electricity).
0
votes
2answers
379 views
Proteus Circuit LED does not work
I am trying to build a double dice circuit. I tried one example I found from the web. But, I have problems with leds, and I am not very familiar with proteus. Could you please tell me why my LEDs ...
-3
votes
1answer
83 views
Circuit diagram of a household connection [closed]
Often, multiple electrical outlets within a given room are all part of the same circuit. So how would you draw an "equivalent circuit" for a four-walled room which has a single electrical outlet per ...
8
votes
3answers
770 views
V/I uppercase/lowercase convention?
Is there any standard in industry for using uppercase or lowercase for V and I in circuit diagrams? I ask this because my book seems to switch back and forth between the two without any rhyme or ...
2
votes
1answer
68 views
Is there a convention for lines separating areas in circuit diagrams?
I often see boxes of various styles to separate areas and increase clarity in circuit diagrams. I'm wondering if there is a line style convention in circuit diagrams for illustrating:
A set of ...
4
votes
2answers
705 views
Electrical symbols, what does a dot before a triangle mean?
Good day.
Trying to recreate a circuit, but I'm not sure what the dot BEFORE the triangle means. I know after it means invertor, does before just mean it's inverted BEFORE, instead of after? Rather ...
0
votes
2answers
1k views
How to set up load sensor in a full bridge with amplifier?
I I'm somewhat new to electronics so forgive me for what I don't know. I'm learning as I go along here.
The overall project is I'm trying to make a scale connected to an arduino board that will ...
0
votes
2answers
64 views
Eye diagram measurement of a CLK using an Oscilliscope
I'm still a junior engineer and wondering how to perform eye diagram measurement of a CLK using an Oscilliscope?
My second question: Is the eye diagrams just using to measure CLKs, or one may also ...
0
votes
1answer
62 views
Help me clarify this really unclear diagram?
5.2 Reduce control IC exposure
2a. Connect VS and COM as shown in Figure 6.
http://www.irf.com/technical-info/appnotes/an-978.pdf
(H-bridge application notes)
Do they want me to connect ...
0
votes
1answer
82 views
I need help understanding how this stepper motor circuit works
This is my first time working with stepper motors. The motor in question is a Portescap 55M048D1B (source: http://www.digikey.com/product-detail/en/55M048D1B/403-1016-ND/417823). I am having trouble ...
0
votes
1answer
361 views
Ladder diagram, variation of Latch and Lock
I have a problem for expanding this particular ladder diagram. The cylinder is a double acting pneumatic cylinder type.
START -> Start button
A+ and B+ -> Cylinder moving forward
A- and B- -> ...
1
vote
1answer
185 views
Using a block diagram for the RS flipflop, add appropriate gates for a D-flipflop
I have been given the problem
"Using a block diagram for the RS flipflop, add appropriate gates for a D-flipflop".
Now, I can create the gate diagram for both RS flipflop and D flipflop ...
0
votes
1answer
530 views
State diagram for 2-bit parity generator
So the question I need help with is: Design a minimal moore state machine for a 2-bit parity generator that outputs ‘1’ if the number of 1s in a 2-bit sequence is odd, and outputs ‘0’ otherwise. ...
-1
votes
1answer
111 views
Trouble finding the input in this circuit diagram
Currently having trouble finding the input in my circuit diagram. I am assuming "z" is my output. As of now my input equations I have figured to be:
Da = BC
Db = CB' + BC' = C(+)B
Dc = C'A'
Z = ...
2
votes
1answer
196 views
One-Line Diagram Standardized Symbols Information
Good day, people. I'm trying to get into electrical substation design and I'd like to know which standard sets the rules for substation One-Line Diagram Symbols .
Any ideas of where can I get that ...
0
votes
2answers
288 views
Bench power supply “Issues that rouse during build”
I'm building a power supply, based on this instructable
and this one
I am using
24volts DC power supply, 7+ amps
circuit is based on LM338 / 7805 / 7812
Circuit is working although few things ...
7
votes
4answers
701 views
Can't figure out the general formula for electric circuit
I have the following setup. Note the device in the middle says P, not R, so I now how many Watts the device produces. (I'm not sure if I drew the correct symbol there)
Calculating the current ...
0
votes
1answer
93 views
Depicting Analog Signal Paths graphically
Is there a 'standard' way to depict analog signal pathways / chains that's simple, concise, and not too mathematical?
I've been searching online, but can't seem to figure out what such a diagram is ...
3
votes
2answers
137 views
What's these symbols style name/source?
I've found a lot of schematic diagrams that use this style of symbols, specially in the Wikipedia. I think these symbols are pretty clear and stylish. I would love to use them for the schematics I ...
0
votes
1answer
88 views
What does “zo <=500Ω” on the pin diagram means?
There is device (viewfinder). It has "Tally" LED. On the camera's output diagram, on the "Tally OUT Indicator" pin there is marking "zo <=500Ω". What does it mean? Should I supply + voltage on this ...
0
votes
3answers
116 views
What does having the v in the center, with the positive near the top wire and negative near the bottom wire mean in this circuit diagram?
This is the diagram that I am asking about:
I understand that the symbol on the left hand side of that middle branch is a current controlled current source, and the symbol on the right is a current ...
0
votes
3answers
419 views
How Do Batteries Behave In Series-Parallel (Verify)
Hi I am confused about How batteries behave in series and parallel. I read online and saw that as you stack more batteries in series, the voltage adds together and the mA's stay the same, and if you ...
1
vote
0answers
144 views
Wiring diagram and phase number of three phase transformer
Does anybody have an idea how to draw vector diagram of primary and secondary of a three phase transformer? For instance, if I need to draw vector diagram for Yzn5 diagram and then also draw the ...
0
votes
3answers
648 views
What's the reason for wiring a relay this way?
I came across the following automotive wiring diagram:
One thing I don't quite understand is the way they wired the relay. I've got two main questions.
It appears to me that they used the exact ...
0
votes
2answers
591 views
How to calculate address range of memory chips
Hi I am not an Electrical Engineer but need to know something about Memory address ranges. I need to calculate address range of each memory chip(62256) from let suppose bank 1 in below diagram. How ...
0
votes
1answer
71 views
ACS758KCB Wiring Diagram
I am using the ACS758KCB Hall Effect sensor for a project. On the front page of the Datasheet it list a .1uF capacitor between Vcc and GND, in addition it lists a capacitor, Cf, between GND and ...
0
votes
1answer
458 views
Undefined part of CSR8645 chip
I am trying to build a bluetooth audio headset and decided to use CSR8645 chip, but while trying to understand diagram of this chip i couldn't identify one part of it.
I am uploading picture ...
1
vote
0answers
239 views
How does this circuit with three transistors work?
I don't understand how this circuit works. Its a clap switch circuit with transistors. I would appreciate if someone could explain how the current flows through the circuit and which transistor ...
2
votes
2answers
229 views
Need help identifying a strange symbol in a wiring diagram
I have this simple wiring diagram for an old tractor, and there are some symbols that look almost like diodes, but not quite. I have highlighted most of them in red in the attached image. Do these ...
1
vote
2answers
438 views
Capacitance - Voltage characteristic diagram in a Schottky diode
I 've searched the web for that diagram with no satisfactory result. Does a schottky diode has capacitance or not because of very tiny depletion (almost none) zone ?
1
vote
1answer
212 views
Are these H-Bridge circuits set up correctly?
I know I can use a driver chip to simplify this a lot, but I just want to make sure that I have the concept of H-Bridges down.
Here they are:
I have two motors, and each have 4 N-MOSFETs ...
0
votes
4answers
162 views
Did I do this circuit diagram correctly?
I just need some feedback on the circuit diagram I made (it's my first time):
This is for a mini-car. There are two battery packs, one connected to an Arduino UNO, and the other connected to two ...
