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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44 views

Is measurement uncertainty 2 times standard deviation or 2 times standard error?

Textbooks and online sources often say the industry standard for uncertainty is given at a confidence interval of 95 %. This means out of 100 measurements, 95 would achieve the specified value and ...
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1answer
49 views

How are equations (transfer functions) and the uncertainties for sensors found?

Does anyone have a good: book / link / resource which describes from the ground up how to find an equation / transfer function and the accompanying uncertainties for sensors? I am looking for ...
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0answers
90 views

How to calculate measurement uncertainty of my pressure sensor circuit?

I want to calculate the uncertainty of measurement in force (+/- ...N) of my homemade pressure sensor. The pressure sensor is like an FSR (force sensing resistor) behaving like a variable resistor: ...
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1answer
42 views

How many standard deviations is Sensor / Component Uncertainty (+/- X) given in?

For example a resistor of 1kohm with uncertainty of +/- 1%, does this mean in 68% of cases = 1 standard deviation, the resistance will vary by +/- 1%, or does it mean in 95% of cases = 2 standard ...
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3answers
72 views

How to calculate measurement error in a voltage divider?

I'm trying to calculate the measurement uncertainty of the voltage represented by the ADC in +/- V or % of a voltage measured across R2 of a voltage divider. What would be the general way to tackle ...
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1answer
70 views

Help with possible errors on LM306 datasheet circuit diagram

Not sure if this diagram has some errors like missing nodes at wire crossing. There is an obvious one at a T-intersection but also I circled in red a couple other locations where nodes might be ...
2
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1answer
109 views

How to calculate measurement error in an exponentially non-linear sensor? (self made pressure sensor)

I'm trying to calculate the measurement error from a home-made pressure sensor which I have in a voltage divider circuit. It has the same negative exponential non-linear resistance characteristics as ...
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2answers
101 views

How do I resolve the following error “Verify failed. [ Pgm ] at 0x0, expected 0x00002805, got 0x00002807” in MPLAB X IDE

I recently decided to get into learning how to develop embedded systems, using MPLAB X IDE and literature available on microcontrollers. The vast majority of which referenced the PIC16F84 and as such ...
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2answers
71 views

Errors in VHDL code

The VHDL code was written by me for a 4-bit PIPO DFF register. I have been encountering some errors when i did so. Kindly check the code and errors below. ...
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0answers
30 views

i2c : When writing to Slave Read 255 seen on bus

I am using Renesas RH850 controller in which I am writing 48 byte of data to slave device (Ublox IC) over i2c every 100ms and sometimes I can see 255 in between my data transfer which results in ...
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0answers
35 views

Laser-Doppler Velocimetry. Math/measurment problem

My team of 3 were tasked to measure the speed of a disc with a small hole on it using laser-doppler velocimetry (measurement and sensor technology class). After doing the measurments and writing them ...
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0answers
30 views

SIM 7600ei AT command error while sending GET request

I am using the SIM7600ei module with a 4g LTE Sim. I am successfully able to get the IP address. ...
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1answer
44 views

Issue with circuit board implementing temperature circuit

I have not got a lot of experience with PCBs, but I have moved a breadboard circuit to a PCB and I am seeing an issue. The objective of the board is to sense temperature. When the circuit is on the ...
3
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1answer
145 views

VHDL Aggregate on Left Side of Assignment : Error in Simulator

I'm designing a counter with a combinational carry out (not registered). To do this I have a concurrent assignment to create the unregistered sum with carry by extending the unsigned input before ...
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0answers
106 views

Contention error 1 or 0?

why these AND gates are getting no output. I confirmed all the connections. The first and gate is getting 0 and 1 as an input but there is an error in output. Can someone help? Urgent
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0answers
30 views

could anybody help me resolve this error?

library IEEE; use IEEE.STD_logic_1164.all; entity select_assignment is port(x1,x2,x3,x4:in std_logic; f1,f2:out std_logic); end select_assignment; --CREATE ENTITY architecture Behavior of ...
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0answers
14 views

Error showing the amperage in PSIM

I have uptadated my version of the program PSIM and I have noticed something. In a simple circuit, I used to click on show probe value during simulation to show the amperage in that point. With the ...
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0answers
43 views

pmos latch switch

We have a power distribution board for our robot that is responsible for switching power to various modules (controlled via stm32 gpio). The first implementation was pretty simple. we used a high side ...
1
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1answer
35 views

Sketch upload fails [closed]

I am using a DFRobot Bluno micro-controller and Arduino v1.8.13. I get the following error message no matter what code I try to upload. I don't know what the issue is, any help is appreciated. ...
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0answers
12 views

Code error: platform.txt from core 'DFRobot Boards' contains deprecated recipe.ar.pattern

I've been trying to program a DFRobot Bluno board with Arduino software recently. It worked fine before but now I keep getting the following error: Arduino: 1.8.13 (Windows 10), Board: "Bluno M0 ...
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1answer
44 views

Source of error DAC - ADC reading

I am testing my new PYNQ Z2 FPGA board with an external DAC and ADC connected. The datasheet for the converters says they are 12 bit, they are able to differentiate between 1 mV and has a range of 0-2 ...
1
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1answer
116 views

Why does the voltage value on the RESET pin of my microprocessor not go high?

I am facing an issue that I do not understand. I am using a STM32F030K6T6 microcontroller with a capacitor X7R 0603 100nF 10% 50V connected to the ground, whose the value corresponds to the ...
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1answer
47 views

Unknown error in Verilog

I am currently getting an error saying that my "counter_2" is not a constant. I am also getting a syntax error when I use "<=" with my counter_2. I've attached screenshots of my ...
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0answers
22 views

EAGLE - Suddenly getting errors about “objects extend outside board space”

Eagle 9.6.2 Standard License Windows 10 64 bit. Very strange. Suddenly I'm getting an error whenever I try to place components in any quadrant but quadrant 1. I am dead in the middle of a project ...
0
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2answers
89 views

What is the practical probability of a bit getting flipped during transmission?

We know that Coding Theory depends on the fact that the probability p of a bit flip must be less than 0.5. From Fundamentals of ...
2
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2answers
1k views

Why is my basic DAC incorrect?

I tried to make a basic R2R digital to analog converter in a simulator. Even with all bits set, I get an output of 4.98V rather than the 5V I would expect. I expected 5V since so many online resources ...
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1answer
22 views

Removing STM32F4xxx based HMI from CANBUS puts the network in BUSHEAVY state

I have a CANBUS with 3 devices on it. A PLC (CAN IO 14+, HAWE), a HMI (Barth DMA-20) and a 6 button CAN enabled button panel (Greyhill). The issue is, when I remove the display from the network (...
0
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2answers
87 views

Flash Not Erasing

I'm trying to erase a single Flash page with the help of the standard HAL library, but it does not clear the page. I've never done that before. More details below. Resources: The used microcontroller ...
0
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3answers
74 views

What is the impact of unhandled exception on microcontroller peripherals?

I always assumed that when an unhandled ARM exception occurs (i.e segfault), the microcontroller just stops executing code. This assumption comes from debugging observation: most MCU I worked with ...
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1answer
39 views

Is error due to sensor tolerance random or systematic? [closed]

Welcome all. It might sound like basic question however it is question worth asking.
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1answer
206 views

LM358 OPAMP non inverting amplifier DC errors

Trying to amplify IR sensor 40mV DC output using LM358 noninverting amplifier circuit. Selected resistance as R1 2.2K and feedback resistance, R2 51K. Got output voltage 0.8V. Measured output voltage ...
0
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1answer
58 views

What is 1.5%rdg + 4dgt for 15,23 V?

Where "Rdg"is for reading and "dgt"is for digits. So, 15,23 * 0,015 = 0,22845. Rounding to most significant digit it's 0,2. So is this correct? $$15,23 \pm 0,2$$ Since 4dgt is smaller we ignore it. ...
6
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1answer
193 views

Why is the verification of Thevenin's theorem more accurate than that of Superposition theorem?

In my first course on Electrical Engineering, we have an experiment in the Electrical lab that asks us to verify the Thevenin theorem and the Superposition theorem and cross-check our results with our ...
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1answer
580 views

OpenOCD throws “JTAG scan chain interrogation failed: all zeroes” error

I am trying to install openWRT on a router using my Raspberry Pi Zero. I am following the exact steps as explained in http://www.alfredklomp.com/technology/experia-v8/ However, for some reason I keep ...
6
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2answers
974 views

What does m% stand for?

What does m% mean? Like in this datasheet from TI at the gain error graphs: http://www.ti.com/lit/ds/symlink/ina149-ep.pdf?&ts=1589388038122 Is it supposed to mean per-cent-mille (10^-5) or per-...
0
votes
0answers
31 views

problem in defining parameters in CST Suite Studio

I want to define the thickness of a material as a parameter in CST Suite Studio. When I give the integer value to the parameter, the model is designed correctly and has a thickness, but when the value ...
1
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2answers
48 views

Calculating uncertainty in a current divisor

I had the following exercise to do for college: I designed an analog ammeter exactly like this: simulate this circuit – Schematic created using CircuitLab The idea is to design an ammeter ...
0
votes
1answer
190 views

How to model voltage controlled switch in LTSpice?

Having trouble making a Buck converter using two complimentary switches in LTSpice. I've got everything laid out exactly as perscribed, but when I run I get the following error: "Can't find ...
0
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0answers
17 views

Q-value in APD photodetector

I try to calculate the Q value of APD photodetector with these parameters: $$R \hspace{0.1in} (response) = 1$$ $$M \hspace{0.1in} (magnification) = 10$$ $$k \hspace{0.1in} (ionization \hspace{0.1in} ...
1
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1answer
894 views

ERROR(ORPSIM-16103): Invalid value when attempting AC Sweep in PSpice

When I attempt to run an AC Sweep in PSpice it gives me an error
1
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0answers
40 views

Is the quantization error and random error included in the of-range error for multimeters?

When I am looking at a datasheet for a DMM (Digital Multimeter) to calculate the accuracy of a measurement it specifies two error sources: of-range and of-value (also called of-reading). For example ...
1
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1answer
121 views

Proteus oscilloscope errors

i have this homework in proteus , but because of the virus my theacher can t explain very good how to use this program.I have this circuit and i can't play it.I attached the circuit and the errors ...
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1answer
272 views

Error (10500): VHDL syntax error at ZAD1.vhd(7) near text “;”; expecting “:”, or “,”

So basically I am doing the 7-input NAND gate and the syntax error keeps showing up (Error (10500): VHDL syntax error at Router.vhd(39) near text "port"; expecting "(", or "'", or "."). ...
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1answer
385 views
0
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1answer
33 views

How do I interpret the zero-g level change vs temperature specification for this accelerometer?

This is an extract from the datasheet of the MPU6050 sensor. I was expecting the level change vs temperature to be in units of mg/oC. Instead, as you can see, the temperature range is specified ...
0
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1answer
57 views

Timeout error in Quad SPI

I am trying to communicate with external flash via quadspi but this time with cubemx and hal libraries. Everything seems to be working fine unless I write something bigger than 0x03 to address ...
0
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1answer
43 views

Sensor Error Adjustment

I have been asked to improve the high end accuracy of a pressure sensor (Without modifying hardware). I have collected data from 30 samples and found a trend to the error. My question now is if it is ...
0
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1answer
59 views

ADS AEL: operand: ee_boolparameter value required whenever I try to compare voltages

I'm not very experienced with Keysight's Advanced Design System. I am trying to use the if statement in my user-defined function to compare two volage values and ...
3
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1answer
111 views

ADC issue - possible non-monotonicity?

My ADC (two of them under test - the Analog Devices AD7676, and the Maxim MAX11108) is a 3 Ms/S SAR. The device is powered and referenced by a precision 3.3V reference device (100mA max). The ...
0
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1answer
359 views

The error “requires SystemVerilog extensions” while declaring an error

What's wrong with the following code? The array "FIFO" is declared correctly, but an error appears. Can you please help how to fix this? ...

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