The diagram that shows how the parts are hooked up logically. If your question is about a specific schematic software package, use that tag instead.
0
votes
1answer
33 views
xilinx schematics to truth table
I have a somewhat complicated Schematics design. Is there a program which could convert my design into truth tables?
If there is no such program, how can I represent the D flip-flops of the following ...
1
vote
1answer
50 views
how to represent a bridge in eagle pcb schematics?
i'm trying to show that points 7,8,10,11 are connected to ground and point 9 is connected to R18 resistor. but the visuals is misleading. how to create that "jump"
(sorry i don't know the correct ...
7
votes
3answers
164 views
Use of ground symbols in circuit diagrams
In this question is the following diagram for a voltage booster intended for small battery powered devices
The TPS61200 spec says GND is control/logic ground and PGND is power ground but this isn't ...
1
vote
3answers
76 views
Shift register on a schematic
I just made something cool (or at least in my mind it is), and I wish to save it under the form of a schematic. So I started making one with CircuitLab.
The circuit includes a shift register chip ...
3
votes
3answers
172 views
Dots in a transformer symbol
I came across this schematic:
What do the dots in the transformer indicate?
2
votes
2answers
78 views
question about resistors in a schematic
So I'm making a board, and this is a recommended configuration for one of the chips I'm using (FT232H). I'm trying to set it in the Synchronous 245 mode. This resistor is to improve clock performance.
...
0
votes
0answers
34 views
IBIS model simulation with spice model
I am designing a Data acquisition system with a Texas instruments ADC, Inamps and a ST micro electronics micro controller. I am getting spice models for my inamps, differential amplifiers etc. so that ...
0
votes
0answers
76 views
UART controller scheme with detalization
I'm trying to find a UART controller scheme. I guess it will be something like the image below, but I need more details: at least, I need all the components (registers, counters and so on) that every ...
0
votes
0answers
24 views
Can Multisim give the same part different values in different variants?
Multisim's variant manager allows you to attach each component in a schematic to one or more variants of that schematic. For example, R7 might be present in variant 1 and 3, but not variant 2. ...
5
votes
1answer
232 views
Meaning of a small rectangle in schematic drawings
What is the meaning of the rectangle at the top of this schematic?
3
votes
1answer
133 views
Schematic symbol confusion
I'm looking at building an audio amplifier using the following the TDA7385 amplifier IC.
Here is the data sheet: http://www.mouser.com/ds/2/389/CD00002618-109852.pdf
I am confused by the application ...
2
votes
1answer
162 views
Where to find buttons eagle cad
Does any one know where to find buttons in EAGLE that look something like the one in this schematic?
I'm making a schematic and all I can find are complex looking buttons. If those are not ...
1
vote
0answers
86 views
What software do people use to make digital circuit schematics? [duplicate]
What software do people use to make electronic circuit schematics like this or similar.I tried using multisim but it seems to miss most chips.
5
votes
2answers
154 views
Pulse generator and source supply connection
I need a signal that most of the time will work as a power supply for the microcontroller but at some external event a positive pulse will be generated and added to the normal power supply. Power ...
12
votes
2answers
178 views
Schematic notation conventions
I am studying this reference design, and see the following 4 connections (only 1 is circled):
At first glance its telling me to use a large trace and/or multiple traces; but I am not sure as there ...
2
votes
1answer
200 views
Kicad Eeschema 'Power Symbol' with local scope?
AFAIK, Power symbols in Eeschema have global scope. What is the best way to achieve local scope power rails? The only one I can think of is using normal net labels or hierarchical label.
When does ...
1
vote
1answer
146 views
How can I obtain PDF from Orcad .dbk?
How can I obtain a PDF file from a schematic in Orcad (with .dbk extension)? Is there a converter?
5
votes
1answer
216 views
How is the following ground symbol different from conventional ground?
I've seen the following ground symbol in quite a few schematics:
How is this different from the typical GND symbol?
2
votes
1answer
136 views
Arrows on connections in schematics
Im using eagle, and was wondering how i'd produce arrows like this:
Is there a specific name for these? That show connections between many schematics.
4
votes
3answers
363 views
What does this schematic symbol mean?
I'm trying to understand what the following symbol is for. It's found in this schematic.
3
votes
1answer
318 views
Schematic Critique: Phy interface with RJ45/Magnetics
I'm working on my first major schematic design and would really appreciate some feedback on the analog side of the 1000BASE-T Ethernet interface. I'm mostly concerned about the analog line termination ...
4
votes
1answer
239 views
-1
votes
3answers
242 views
How do I make sense of schematic diagrams? [closed]
I was wondering if somebody could help in explaining to me what information the following two schematic diagrams show.
I am quite new to this so I would appreciate if someone could help me ...
3
votes
2answers
318 views
Buck switching regulator based on ATtiny84a — please critique!
Here is an attempt at designing a buck regulator based on a ATtiny84a as the PWM controller.
It should go from a 4S LiPo battery (12.8 - 16.8 volts in) to a reasonably regulated 12V output, used to ...
4
votes
1answer
362 views
Pogo Pins Schematic
I have a Galaxy Nexus phone which has pogo pins:
I have determined which pins are PWR and GND but I don't know what the third pin is. I assume it is for the dock feature of the phone so it knows ...
5
votes
3answers
313 views
Making a schematic in KiCad; how to represent connections from another circuit board?
I'm using KiCad to design a circuit for my latest project. This board includes a number of transistors whose bases are connected to off-board signals.
What's the proper way to represent this, so when ...
0
votes
0answers
121 views
open source project hosting tools specifically for hardware design? [closed]
Background
I'm finishing up on my senior project of home automation, and after the year of research I noticed there isn't any collaborative system for open source hardware for home automation, so I'm ...
2
votes
2answers
119 views
What are the advantages of including mounting holes in a schematic?
I've seen some designs which have mounting hole included in the schematic. Are there any good reasons of doing that?
I can see one advantage of doing so when you want to connect your mounting holes ...
1
vote
3answers
438 views
Are the LED's in this diagram Backwards
I'm trying out a Make Project: Sound-O-Light Speakers
It has this diagram:
The LED's are backwards in this diagram, right? The "arrow" (anode) part of the LED should be hooked up to the positive ...
2
votes
2answers
153 views
Circuit symbol for ammeter with output
What is the correct symbol for an ammeter that measures 0..200 mA and generates 0..2 V proportional output?
1
vote
2answers
249 views
How is it possible to make Eagle parts containing multiple components?
Is there any way to achieve the following (or something equally helpful) in Eagle?
I would like to create a library Part that itself consists of multiple components pre-connected and pre-routed (by ...
2
votes
1answer
151 views
Resistor value labeling, what does the second number refer to? [duplicate]
Possible Duplicate:
µ in the Middle of a Capacitor Rating
What does 3V3 or 1V8 mean
I have been looking over some schematics for an industrial Laser. Some resistors which have low ...
2
votes
1answer
422 views
What's the use of the bypass capacitor on the LM380 amplifier?
I've read the LM380 amplifier data sheet and application notes, and they show a power supply ripple rejection number that's based on the size of the bypass capacitor. There are also a few designs that ...
5
votes
4answers
780 views
components within a triangle in an electronics diagram
I'm trying to understand the following circuit diagram:
Specifically, the four triangles within the L293D component. So I understand there are two transistors in there, connected in series from 24v ...
2
votes
1answer
420 views
MOSFET on/off switch — asking for critique
I want a "power button" that is actually two buttons; one on, one off.
This needs to switch on the order of 15 V and up to 10 A, for a LiFePO4 battery powered device.
I don't want to use a hardwired ...
0
votes
2answers
345 views
Emulate many-pole, dual throw switch with transistors
How can I use transistors and other discrete components to make a circuit that functions like a DPDT (double pole double throw) switch, and can be extended for any number of poles required? For ...
5
votes
3answers
324 views
CAD Schematic pin arrangement approach
I was looking for related questions here, and the closest one I could find was this one: Industry Practices for Schematic Design?
However, it does not address my specific question, so here goes: I am ...
4
votes
2answers
307 views
Basic schematic help
I'm trying to design a lighting circuit for an indoor garden, and I'm not understanding things that seem like they're really basic, so I need some help. The schematic I'm referencing is:
I have a ...
2
votes
1answer
393 views
transferring raw schematic to breadboard and PCB
i have some schematic from TINA pro, pspice, orcad and the lite. Is there a way to automatically convert it into a both breadboard and PCB layout. This is a bright idea since it will save time. What ...
4
votes
2answers
465 views
Creating a component library which includes distinct elements
I'm learning custom library design in Altium Designer. I designed several libraries so far (BJTs, resistors, capacitors, etc), all worked without any problem. This time I tried to design an IC package ...
7
votes
2answers
721 views
comparator schematic symbol
This schematic appears in a recent question. The triangle may be an op-amp or a comparator, because they both have the same connections. (Why) isn't there a separate symbol for a comparator? The ...
4
votes
3answers
2k views
How to easily find or create parts for Eagle schematic/board layout
For Eagle CAD software, during schematic or board layout, how can I search for parts/footprints already created by other people out there, to make my life easier? And if I'm still unable to find what ...
18
votes
3answers
1k views
Anyone knows what software tool is used to draw these circuit schematics
I was reading online and found this site: http://www.cppsim.com/
I was very curious how this professor drew all these circuit diagrams in his lecture notes (such as this one: ...
7
votes
2answers
509 views
Schematic critique
I designed my first electronics project and I'd be thankful if you could give me any feedback on it.
I'm specially looking for any beginner mistakes, anything wrong or inefficient with my circuit, ...
6
votes
4answers
432 views
Logic gate symbol vs IC symbol
When I'm using a logic gate (let's say AND) in a schematic, which symbol should I use: the AND symbol or the IC symbol (the 4081, for example)? Or in the case of flip-flops, should I use the flip-flop ...
6
votes
2answers
377 views
Software for creating cable schematics
I'm looking for free software to create drawings of communication cables eg. DE-9, RJ-45, Ribbon Cables, and Molex. I can't seem to find any software that comes with images of the connectors that can ...
1
vote
2answers
295 views
how do I put this schematic into a breadboard?
I need for a project to make an electrical dice in a PCB, but first I need to prove the design in a breadboard, I really don't understand all the schematic, so I need a huge help on this. ...
3
votes
1answer
1k views
Use sheet entries on Altium
I am trying to make a sheet entry to use ports to connect devices in different sheets as explained in this image:
But I am getting an error from Altium saying:
...
3
votes
1answer
1k views
How to use Altium Buses?
I am new at Altium, I am trying to connect 8 wires but using a bus. I have read about this in Altium's web page but I doesn't explain too much about how to connect buses on the way I need. I want to ...
1
vote
1answer
207 views
Looking for an easy to use circuit design software similar for beginner
I'm teaching my son digital circuit design. I am looking for an easy to use design tool that can serve to sketch out the circuit and simulate it before we go and blow chips and money. The ideal ...
