Questions tagged [error]

An error is the unwanted operation of an electrical / electronic component or system resulting from malfunctions. Use this tag if you have something that doesn't work as it should, or doesn't work at all.

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38 views

IR Temprature MLX90614 Sensor Diffrent behavior based the I2C Scanner Checking

I need to work with Temperature MLX90614 on Arduino, when i used it's default library code, in bread board sometimes i get correct answer, so i used the soldered circuit for it like this: in this ...
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0answers
54 views

FTDI Chip Windows Error Message “USB device attached malfunctioned and windows does not recognize.” Design Error?

My PCB has a FT230XS-R USB to UART communicating with an AVR chip. My first prototype board worked perfectly except for the USB problem stated in post title. I triple checked everything. Can NOT find ...
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22 views

Derivation of resultant standard deviation from individual standard deviation of an expression

Consider a problem: The total current \$ I=I_1 + I_2 \$ in a circuit is measured as \$ I_1=(150 \pm 1 ) A, I_2=(150 \pm 2 ) A \$ , where the limits of error are given as standard deviations , ...
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55 views

Removing modelsim error

I am trying to simulate a simple inverter in verilog using modelsim 10.7 version. While compiling the code I am getting the -novopt error (error code 12110). As per user manual page 80; the -novopt ...
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2answers
104 views

How to solve Keil compiler 'Error: L6218E: Undefined symbol' on STM32

I am trying to run a simple tutorial (external interrupt example) on my NUCLEO-F746ZG board. I use STM32CubeMx software version 5.2.0 and Keil software version 5.28.0.0 as compiler. I get the ...
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1answer
44 views

How can line code polarity inversion happen?

One of the disadvantages of some line codes like NRZ-L or RZ is that if a sudden change in polarity occurs, then all received bits will be erroneous (flipped). How can such a sudden change in ...
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0answers
52 views

What causes long-term RTD reading drifts?

I am working with a controller that was designed to read multiple types of inputs including 3 wire RTD signals. In some cases, we have observed the controller suddenly spike up +15 degrees and ...
0
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1answer
64 views

PCB design rule errors, but can't understand why

I am trying to create a PCB using NI Ultiboard. My circuit is a SECPIC DC-DC converter and controlling the L1 current. This is my circuit: and I get this error: ...
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0answers
58 views

VHDL - Unable to correctly implement complex scheduling of data lines to Inputs of multiplexers

In my design, I have two configurable parameters ...
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1answer
34 views

Solve setup time violation when CLK is same as data input in shift resistor

DSTM7 is same as push button 1 and DSTM8 is same as push button 0. I want shift resister shift when either button is pushed. For example, when push button 1 is pushed and DSTM7 has a pulse and shift ...
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1answer
40 views

General expression for non-unity gain feedback system's steady state error with disturbance

Thanks in advance for having a look. I finally have some time on my hands to go back through my controls systems text and I want to understand how the general expression is derived; rather than just ...
5
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2answers
331 views

Why have apparent memory bitflips in non-ECC memory not increased?

Back in the early 2000s I remember asking about why it was so important that servers use ECC memory. The prevailing wisdom at the time was that systems with lots of RAM would be, statistically, more ...
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4answers
151 views

Why won't this circuit work?

I made this circuit. I calculated everything, but all I get is THE LED JUST WONT TURN ON. simulate this circuit – Schematic created using CircuitLab
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1answer
71 views

INTERNAL_ERROR:Xst:hdltool.c:4862:1.209 - Signal lookup_b.address, 0 ones:XX

I'm getting the above error message, and I don't understand what I'm doing wrong. I've only found one reference to that message, and it led me down this rabbit hole of trying to apply the ...
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1answer
65 views

Why does this file give syntax error in verilog?

My original file has the following ...
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0answers
131 views

ETAP: Error when connecting single phase load to three phase bus

This is a long shot, but hopefully someone who works with ETAP can help me out. Im trying to connect a single phase load to a three phase bus, and Im having this error: Error 1655-01: The load has a ...
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1answer
18 views

Need some help in bit error rate calculation for QPSK when using Gray coding

Why is Probability of Bit Error = 2 times the Probability of Symbol Error in QPSK with Gray Coding. Is it because one bit error has the potential to cause two symbol errors (2 symbols where they ...
2
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1answer
381 views

PSPICE - must be 'I' or 'V' error

I'm trying to make a super simple circuit simulation for a class, and I keep getting the same error: ERROR -- Must be 'I' or 'V' Here's the whole log: ...
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0answers
138 views

Detecting both short and open circuit voice coils in coil driver

I'm building a voice coil driver for a science experiment. The coils are in an environment where both coil shorts and coil open circuits are common problems. I'd like to build in a fault indicator to ...
4
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1answer
191 views

What is the typical RMS noise of a lithium battery?

Take a typical CR2032 battery, if it is not discharging, what is the typical variation in voltage over a short period of time (eg a few seconds or minutes)?
2
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1answer
63 views

Error Amplifier Gain

I was studying the "SG3525" IC and its functions, and I encountered this issue: In the "Error Amplifier" section of the Datasheet, there is a parameter that named "DC trans-conductance" which it is "...
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0answers
70 views

Error: L6218E: Undefined symbol LCD_X_Config in Keil

I encountered a problem working with the EMWIN package in keil, this error message: ...
2
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1answer
49 views

J-Link programmer in Windows 8 don't work

I use the J-Link programmer in Windows 8. A few days ago, my programmer hanged and the LEDs stayed silent, and I, with the help of the Internet, was again using the SAM-BA software to install the ...
1
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1answer
424 views

PICkit 2 VPP voltage level error. Check target & retry operation. Error in PICkit 2

We are using PICkit 2 (STL035V2.0 See here ) to program a PIC 16F676. We got the error : PICkit 2 VPP voltage level error. Check target & retry operation. Error in PICkit 2. We also ...
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0answers
48 views

Steady State Error to Ramp Input Using Derivative of Complementary Sensitivity

I know that to find the steady state error to a ramp input, we can use the final value theorem. However, I was reading up on the Internal Model Control and the article uses a different form of steady ...
2
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1answer
676 views

The CAN bus in this vehicle has only one 120 ohm termination resistance. What problems would this provoke?

This vehicle that I've started co-developing is designed with only a 120 termination resistor on the CAN bus. Obviously there should be two of those resistors on two ends of the bus. I will be making ...
1
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2answers
154 views

SD card initialisation problem with Atmega32u4

I have had this issue for the last couple of days and I cannot solve it. There are many similar issues I've read through online but they have not really worked for me. This project involves a PCB and ...
0
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1answer
62 views

Compiler error when using HAL functions for I2C communication

I am using the board STM32F3 and I am trying to establish I2C communication between the microcontroller and the accelerometer LSM303DLHC by using the HAL functions. This is the code: ...
0
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0answers
66 views

SRAM problem with reading the value I stored, “random” behavior

I've now spent quite a few hours of researching and trying to identify the error, but no luck for me. I'm making a very similar circuit to James Bates RAM video (schematic here: James Bates RAM ...
1
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1answer
45 views

DC Gain too low at higher voltages

I am having an issue with DC gain for a non-inverting op amp circuit. All I am trying to do is double the voltage from two DAC outputs (DAC range is 0 to 5V and I want it to be ~0V to 10V). The DAC ...
0
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0answers
73 views

Steady state error due to disturbance

I was trying to solve a question from the 2004 GATE IN paper, I solved it this way, Now, the book is giving a different solution, I'm pretty sure my way is correct since they pulled the "standard ...
-2
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1answer
316 views

lt Spice simulation duplication error

I am new to using LT Spice. I have imported an operational amplifier. When I try to run a simulations response I received an error (shown in the screenshot.) It says Netlist Error: Duplicated ...
1
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1answer
66 views

PSPICE graphs work separately for subcircuits, wrong when combined?

I'm working on a pulse generation circuit that will be used to drive an ultrasonic transducer. The following circuit is giving an unexpected output. It might look complicated, but really it can be ...
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2answers
47 views

AT90CAN128 Random Malfunctions

I've got the following Situation. An AT90CAN128 connected to a LCD,multiple Buttons, Sensors,LED's and engines. Shown on the LCD are the Sensor Values and a Menu you can go through with a rotary ...
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1answer
263 views

Error (10028): Can't resolve multiple constant drivers for net “rf[7][XX]” at registerfile8x32.v

Hello Im making a register file 8x32 in verilog, the sim looks good but when I compile on quartus it makes Error (10028): Can't resolve multiple constant drivers for net "rf[7][31]" at ...
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1answer
55 views

R&S Spectrum Analyzer Voltage Measurement Error

I just got FPC1000 spectrum analyzer that goes from 5 kHz to 1 GHz. I didn't had any spectrum analyzer experiences before this one so everything is very new to me. Among few things that I don't ...
1
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1answer
72 views

Accidentally Pasted Beyond Origin in Altium

I'm new in Altium and I accidentally pasted some pads and components(the ones at the bottom corner) from another pcb file but I wasn't aware of it at first because it didn't show on the sheet on the ...
0
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2answers
226 views

Cleaning up GND/PWR-plane air wire errors in EAGLE + bonus questions

So I've just finished up my first complete PCB board. The layout is 4-layer based, set up as ((1*2)*(15*16)) ---not sure if it should be ((1+2)*(15+16)) or ((1*2)+(15*16)) instead, please advise--- ...
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1answer
229 views

What is RSS Error?

I was reading through documentation for an INA219 sensor from TI (http://www.ti.com/product/INA219), and they have a chart for RSS Error. What does RSS stand for?
2
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2answers
45 views

Random Error Waiting Time

Suppose that you have a design that has had an error after running 14, 18, and 20 hours. You're not exactly sure what is causing the error, but you make a change to the design that MIGHT fix it. ...
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0answers
101 views

Impedance magnitude and phase error - Mathematical formula

Today I read a paper on which there are the terms magnitude error and phase error relative to a comparison between measurements performed with a biosensor and with a benchtop electrochemical impedance ...
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2answers
235 views

SystemVerilog: Race condition in memory

Hello I'll be brief because my English isn't good thank you for your patience I'm working on a system that drives this memory: ...
1
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3answers
261 views

Altium track width DRC error on corners

I just ran the DRC check in Altium for my PCB and I get errors on trace width for every trace segments on the board. What is the reason for this ? It generated thousands of errors even tho all the ...
0
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0answers
282 views

Altium Comma expected

I am working with an older version of Altium (V09). I have this popup every time I want to move a part in a PCB doc. I have the sch and the pcb open and I changed some parts in the sch and to ...
2
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1answer
1k views

Error setting up timer HAL PeriodElapsed Callback STM32F334R8T

I'm trying to create a microsecond delay function using the STMs regular timer. I wanted to set a timer to fire an interrupt every microsecond and then increment a variable in the call back function ...
0
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1answer
49 views

Adding to a sum variable produces a “reals can't be synthesized” error in verilog

First, a disclaimer that this is my first time using verilog and I don't really know anything. My code is as follows: ...
0
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1answer
107 views

2nd order high pass filter PSPICE error

I'm working on designing a 2nd order sallen key high pass filter in PSPICE for a school project, but in subthreshold with resistors replaced with OTAs (transamp). Schematics shown in figures below. ...
0
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1answer
346 views

Multi driver error in VHDL

Hi I am writing a code for image processing that includes a Ram to/from which data will be written and read. However, I am getting 15 errors like the one below. ...
0
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1answer
113 views

Gain of proportional Controller with distubance \$sin(10t)\$

The diagram below represents the position of ocean oil platform system which use the proportional controller with gain \$k\$. The output \$x(s)\$ is the platform deflection regards the position ...
2
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2answers
42 views

Systematic high frequency error in TF measurements

Full disclosure, I've asked a very similar question before which didn't have much success as it was too specific. However I want to try again by restricting the scope of the question. Scenario I'm ...