The error tag has no usage guidance.
0
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22 views
the needs of CRC on communication using 3DRadio
I've been designing a system to communicate between an UAV to GCS by using 3DRadio module, and on its page it seems that it already features CRC
The ECC parameter makes a big difference to the ...
3
votes
1answer
36 views
Altium error: Net contains multiple output sheet entries
I'm having a hard with this one and cannot figure out how to deal with it. As shown in the figure below, ADC[0..2] is going out from A2 and A3 and in to A1:
In details:
ADC 0 is the output of ...
1
vote
1answer
31 views
Altium Designer: How to handle these type of Nets?
I have such complicated Bus [0..4], which go out from Page 2 to Page 1, and then from Page 1 to Page 3 as shown in the figure below which is a Top Sheet:
I receive the following error when I ...
0
votes
0answers
23 views
Lattice fusemap error
So today at work I got a Lattice Platform Manager development board (LPTM10-12107-3FTG208CES and I started working on a program to test it. I created the JEDEC file, opened the programmer, connected ...
0
votes
1answer
99 views
Why did sparks fly when testing outlet frequency?
I'm using a multimeter (Mastercraft 052-0052-2) and I decided to see if the frequency of an outlet would read 60hz. I switched my multimeter to the FREQ setting and plugged the RED test lead into the ...
0
votes
0answers
54 views
Proteus 8 stop showhing Simulation errors tab
When running a simulation then ending it, the "Simulation errors" tab appear automatically, and that's a bit bothering because it takes all the window, and I have to close it everytime. Is there ...
0
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0answers
52 views
Altium: Unconnected port “xxx” at 550,430
As a new in Altium and trying compile my PCB project. I got a warning which says:
Unconnected port "xxx" at 550,430
It seems really strange since I see a normal port which is connected to a BUS at ...
2
votes
2answers
66 views
Altium error: Open emitter pin and power pin object!
I am new with Altium Designer. I receive the following error:
(+12V contains Open emitter pin and power pin object!)
Here is the error schematic part:
The error is in Pin 4. Any TIPS?
0
votes
1answer
60 views
Designed an electronic circuit using APR33A3. Not working [closed]
Designed an electronic circuit using Datasheet of APR33A3. It doesn't work.
Checked the connectivity between component and it seemed fine.
I have given a 5V DC supply
Using an electret microphone
...
0
votes
1answer
26 views
Estimating error due to Vref deviation on delta-sigma adc
I am trying to estimate the error caused by deviation on the reference signal for the following 22 bit Delta-Sigma ADC and high precision linear voltage regulator:
...
0
votes
1answer
51 views
Quartus: Error (12004): Port z does not exist in primitive x of instance y
I cannot find any source for this error, any help much appreciated!
Error: Error (12004): Port "a" does not exist in primitive "tff" of instance "t1"
...
1
vote
1answer
187 views
How to measure power factor cos phi with an Arduino?
according to How does one measure the power factor? I can measure the power factor (cos phi) by comparing the zero point crossing of Voltage and Current. This is clear.
The problem I have is what if ...
0
votes
2answers
37 views
Possible calculation error using current divider rule on a non ideal current source circuit
I am going through my notes in preparation to an exam, the following was taken straight from the board as my lecturer wrote it.
As far as im aware the current divider rule should be $$I1 = It * ...
3
votes
3answers
87 views
Can probing an EEPROM with a multimeter corrupt the data?
Say there's an EEPROM on a board and you happen to try probing the pin one by one with a multimeter, is there a good chance that the sequence of probing the pins must have overwritten (thus corrupt) ...
0
votes
2answers
116 views
LTSpice Simulation Showing Inaccurate Results and Excessive Current
So I'm trying to make the following simulation work properly to verify some hand solving for a circuit. The circuit is an LC tank with some diode clamping, and an initial capacitor voltage of -50V.
...
1
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0answers
117 views
Multi-driver net found
I have been putting together a project for work in Vivado 2015.2 When I try and implement the design I get these errors. The project is pretty large that's why I haven't included it in the post. Is ...
0
votes
3answers
52 views
Term for errors that are constant for a measurement
In my measurements, I am encountering errors that remain constant over a measurement but change from one measurement to another. The errors specifically are amplitude and phase errors resulting from ...
1
vote
1answer
68 views
How to avoid garbage values received in UART communication
I am new to the embedded programming. I am doing a UART communication in PIC32MX795F512L MCU. I have somehow managed to transmit and receive data but not able to ...
3
votes
2answers
135 views
Altium error: Un-connected Pin Constraint
I have a pad in a IC left unconnected. I have set No ERC on that pin in the schematics to suppress of all violations.
But I still get "Un-connected Pin Constraint" error in PCB.
How can I ...
2
votes
2answers
152 views
Error reading data through UART using peripheral library in PIC32?
I am trying to receive data using UART. I am using PIC32MX795F512L Micro Controller and using 32 bit peripheral library, so I using functions like putsUART or ReadUART1
Now in the code :
...
0
votes
1answer
26 views
Distribution of phase errors
I have to implement a phase error model to see effect of phase errors on antenna patterns. However, the distribution of phase errors isn't provided to me. I am not sure whether to assume the phase ...
2
votes
2answers
174 views
Connecting Custom Metric Part in Eagle
I made a custom library for a 1x3 header with 5mm pitch on Cadsoft Eagle. Since I had to make the pins in metric, I'm having an issue now connected to the 0.1 inch grid that the rest of my schematic ...
2
votes
2answers
81 views
Erroneous results from ADC and piezo disk
Okay, so I posted this question before but my design has changed and has become unmanageable.
I am attempting to create an electric tuner device which uses a piezo disk to accurately measure the ...
1
vote
3answers
66 views
PIC24FV Reset without Flag
I am working on building an interrupt based program flow using the PIC24FV32KA302 module from Microchip. However, I am having some trouble with intermittent resets (it seems).
I am currently using ...
0
votes
2answers
66 views
A confusion about error components in a data acquisition system
My question is related to my previous question:Accuracy of a data acquisition hardware
In a data acquisition system absolute accuracy is defined as measure of all error sources as following:
Abs. ...
0
votes
1answer
53 views
NTC based voltage divider relative error
I'm making an analysis of the error introduced by two different resistors in a voltage divider (and taking the voltage out from the middle of two series resistors).
I'm using this for an NTC reading, ...
0
votes
1answer
37 views
Altium error when simulating diode
I have a rather simple circuit and would like to have it simulated. It uses a Schottky diode from the Misc Devices.IntLib, but it keeps giving me an error. It looks like the .nsx is using incorrect ...
0
votes
1answer
147 views
“Unresolved reference to 'countmode1'” , Verilog simulation error
When I want to simulate the following code, I get these errors:
...
1
vote
1answer
104 views
Worst case error for a DAC
I am trying to estimate the worst case absolute error for a DAC (the example I'm taking is MAXIM MX7524). I'm getting familiar with the concepts of INL, DNL,... But how would you estimate the worst ...
1
vote
1answer
66 views
Eagle - clearance errors and display errors
I am beginning with eagle, I have not any experience with this program.
Could you please tell me, what does it mean clearance error, overlap error and dimension error. How could I avoid it and remove ...
0
votes
1answer
486 views
Altium: Error in importing changes to PCB
When I first imported everything from schematic to a new PCB project, it all went smoothly. But note that I have duplicate schematic sheets that have the exact same circuit, net, I/Os, etc. I tried ...
0
votes
1answer
70 views
Altium: PCB rule check violation errors
I'm not sure how to change the rules to satisfy the component constraints
1
vote
1answer
125 views
Altium: Rules and Query syntax
I want to set some rules for certain components. These rules are in the minimum solder mas sliver but I'm stuck on the query.
So far I've written IsDesignator = U7 but nothing seems to change and I'm ...
0
votes
0answers
41 views
Altium: Foot print manager
Somehow not all schematic components (3 out of the 10 schematics have their components in the footprint manager) are found in the footprint manager. I made sure all tabs above (i.e. designator, part, ...
0
votes
0answers
58 views
Altium: Version Control Error
Once upon a time I created version control for my project file KHS_PLD_XADE_EM and located it in one of my folders.
One day as I was working on my project, I noticed the green check marks for ...
0
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0answers
57 views
Atlium: Errors in PCB
I keep getting the same errors repetitively and I couldn't figure out the reason.
As I was placing the components on the correct position (i.e. resistor), suddenly the component changed pattern from ...
1
vote
1answer
87 views
Why the voltage of supply got stuck when connected with leds?
I was working with some smd LED's trying to make their V-I curve. For that purpose, I connected two segments parallel to each other each containing two leds as shown, to a regulated dc power supply ...
0
votes
0answers
107 views
ISE 14.7 fatal error problem
I am having fatal error problem in ISE 14.7. I checked out for this problem and got here:
http://www.xilinx.com/support/answers/33423.html
It says that this error can also occur if the simulator ...
3
votes
1answer
62 views
Altium - Change Color of Error Text in HUD
I had this set up on my PC a few weeks ago but lost it when I had to switch computers. I am trying to remember how to change the color of the Online DRC Errors shown in the HUD when hovering over the ...
-1
votes
1answer
174 views
Xmega128C3 TWI read error
I'm interfaceing an Xmega128C3 with MMA8451Q acceleration sensor via i2c. I was able to initialize the accelerometer, I checked every transmission on oscilloscope, it was done properly.
The problem ...
0
votes
1answer
70 views
Power Isolation generating error in KiCAD
I've created a ferrite bead part with two passive pins. When I insert it in a power line, it causes an error "ErrType(3): Pin connected to some others pins but no pin to drive it" Changing the pins to ...
0
votes
3answers
1k views
Modelsim (vcom-1491) Empty source files
I am trying to compile a design in modelsim (which I am new to) and I keep getting the following error for one of the files...
(vcom-1491) Empty source files.
I ...
4
votes
2answers
861 views
Accelerometer double integration error
I wanted to use an accelerometer or IMU to measure speed and displacement over a period of about 1 minute or 400m. From this answer I found at stackoverflow, the error propagates at a rate of \$t^2\$ ...
1
vote
2answers
546 views
How does wiring resistors in series and parallel affect their errors?
In an experiment I am conducting, I am trying to measure low currents by wiring a radio device in series with a small-resistance resistor setup, composed of 9 of 1 ohm +/- 5% resistors in series and ...
2
votes
2answers
97 views
How do I calculate the frequency accuracy of a Fluke DMM?
I have a Fluke 8846A and I want to make a frequency measurement with an error less than 1 mHz. I'm having trouble interpreting the manual as to calculate the error of a 120V 60Hz measurement.
...
-4
votes
1answer
112 views
0
votes
1answer
59 views
Uncertainity Calculation
>
How can i calculate the absolute uncertainty dt in the following case T=(P/A)^1/4
if ...
1
vote
1answer
353 views
LSM9DS0's Accelerometer not reading correctly
I have a LSM9DS0 Gyroscope/Accelerometer/Magnetometer breakout board. I am using an Arduino Uno which operates on 5V. The LSM9DS0 is communicating to the Uno using I2C through a Logic Level Converter. ...
0
votes
1answer
226 views
All capacitors leaking on Emotiva PSU? [closed]
I've just opened the top of my XPA-2 amplifier and had a huge surprise: it seems like almost ALL of the caps are leaking from the bottom. Not just the main PSU caps, but smaller ones on PSU PCB and ...
3
votes
1answer
1k views
The timing-driven placement phase encountered an error
Could someone explain inexperienced VHDL coder what this error message trying to tell me in simple words? I found a similar question here, but here was no answer to it:
...
