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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If function error in LTSpice

Hi I am trying to simulate a model of a paper in LTSpice but I get an if function error which says "Syntax error: function if(): requires exactly three segments" These are the code of the ...
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spv1050 not subcircuit parameter. how to solve this error.?

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3 votes
1 answer
80 views

In LTspice, why does having these two transformer models create an error?

I've run this circuit with all the inductors placed in the circuit with the appropriate 'K' commands and, although deeply slow in the simulation, it works just fine. When I've placed them into models ...
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  • 143
5 votes
1 answer
133 views

Voltage on battery-backed SRAM somehow higher than both battery and regulated supply

I'm using an AS6C1008 SRAM chip, and I'm having an odd issue with it. The voltage supply going to this chip is created from a stiff 5V supply (VDD) and a 3V backup battery (CR2032), diode or-ed ...
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2 votes
2 answers
106 views

How to minimize the effect on DNL error from this opamp circuit?

By using the following single LM324 circuit, I create amplified bipolar outputs from a 16-bit 0-3.3V DAC output as follows: My aim is to minimize extra DC error due to the above LM324 circuit ...
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2 votes
1 answer
55 views

What is the proper way to handle a status led when HardFault_Handler or any error is raised?

I am trying to implement a very basic status indicator using an STM32 - Basically I would like to toggle a RED LED when a fault is triggered by the MCU. Naively I added a toggle LED function in the ...
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0 votes
0 answers
57 views

Analog pins showing incorrect data. Only from 0 to 255

A month ago, I connected a joystick with an Arduino Uno. VCC with Arduino 5v, GND with ground and Y axis with analog. I tried all, but the error persist with all 6. A month ago, in the serial monitor ...
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26 votes
1 answer
1k views

Laptop motherboard not working, quiet clicking noise

Intro how it happened: I had cleaned my laptop from dust and reapplied the thermal paste. After this i have reassembled the device than it did not turned on. Then i took it apart connected the fan and ...
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0 votes
1 answer
36 views

Weird values from ADS1115 chip and remote I/0 error

I am using a ADS1115 chip to read the values from a potentiometer and then transfer them to a raspberry pi zero w. I wired the potentiometers, so that on the left would be the lowest. GND - DATA - VDD....
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0 votes
1 answer
110 views

Syntax error Begin statement HDL 9-806

I have an error in the form of HDL 9-806 on the begin statement. The code below is a button based sequence detector an addition LED flash when sequence is correct with a debouncer to stop multiple ...
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-1 votes
1 answer
60 views

Net PWMA_IC3 contains Multiple Input Ports(PWMA,PWMA) [duplicate]

I have to give two different PWM Input to my two Gate driver ICs my design. i have taken two output ports PWMA and PWMB hoping, I will make them 180° apart in phase in programming. 2)I want to give ...
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1 vote
0 answers
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How to fix Texas Instruments DAC81408EVM Internal Oscillator error

So I'm working with Texas Instrument's DAC81408EVM (https://www.ti.com/tool/DAC81408EVM) as an external DAC for a project I'm working on. I'm posting here because TI's forum won't let me ask questions ...
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1 vote
2 answers
144 views

Attiny85 Burn Bootloader Error [Device signature = 0x000000] [SOLVED]

I had read in different forums about similar issues and double-check the connections and datasheet. But it's still not working for me. First of all, I will share my build and my configuration. Later ...
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-2 votes
1 answer
65 views

How to perform quality assurance? [closed]

The site description is given as "Q&A for electronics and electrical engineering professionals, students, and enthusiasts" and I'm interested in "QA for electronics". Though I ...
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-3 votes
1 answer
59 views

Find the range of uncertainty? [duplicate]

The problem says that an ammeter has a 30 mA upper measurement limit and its accuracy class is 2%. For the relative measurement error when measuring 22 mA, I found it is2,7%. I used the formula h(%) = ...
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0 answers
44 views

Am I reading the multimeter uncertainty correctly? [duplicate]

I am using a multimeter that has an uncertainty (from the manual) of 0.5% plus 5 digits in DC voltage measurements, 4V range. I have a reading of 1.6172 V. That means an uncertainty of 0.508 V. Isn't ...
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1 answer
70 views

Type of X is incompatible with type of XXXX

I have the following code(I'm pretty new in VHDL): ...
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1 vote
0 answers
56 views

Servo creates a constant "angle error" depending on its original position

I am trying to set a servo to move to the same angle always when given the same PWM signal. I am using a Savox SH-0262MG. I have an issue when I first move it manually (with my hand) to one of its &...
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0 votes
1 answer
86 views

How can I make output voltage bigger for this stabilizer?

For my project I have to design an voltage stabilizer with 5V on input and 3.3V on output.In order to do it , I selected a Zener diode for my reference (D1 and R1) , A divider for negative reaction (...
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1 vote
2 answers
330 views

Why am I getting the error "nets with possible connection problems" on my ground pins in Altium?

Can somebody please explain why I am getting errors on my ground pins when connecting to a GND port? As you can see the pins are defined as POWER type. The error is "Nets with possible ...
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0 votes
0 answers
115 views

Pin Swapping Not Available?

I am a bit of an Altium novice. Designing a board and trying to use the "Route Guide" in PCB ActiveRoute. However, when I try to lay out a guide with selected pads and hit ActiveRoute, ...
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1 vote
1 answer
535 views

How to fix STM32 Stuck with error ST-LINK error (DEV_TARGET_NOT_HALTED)

I have a custom board with a STM32H7A3ZIT mcu. I'm programming it with a ST-Link V2 via SWD. I'm trying to get an external hyperbus ram working, and immediately after programming the mcu with some ...
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2 votes
6 answers
607 views

Blink when input is constant?

I would like to have a status LED to make sure my microcontroller software hasn't faulted. From software, I will alternate an output so if it dies, the output will be constant. I want the status LED ...
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0 votes
1 answer
105 views

Checkered Pattern on Altium Traces

I'm seeing a checkered pattern on a couple traces in Altium I'm curious as to what it might be, how to remove it, and if it might be the reason I can't save. This is the error I'm getting when I try ...
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0 votes
4 answers
137 views

LTspice error, "Matrix is singular" for 3 phase circuit

I have been searching about it online but all I can find is info about a transformer. Am I missing something? Here is the circuit: This is the circuit I am trying to make:
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0 answers
38 views

Stepper Motor Driver (2CM560) ERR ports

I have a Kinco 2CM560 stepper motor driver. There are 2 ports on this driver named "ERR+" and "ERR-" that I can't figure out fully what is their functionality! why we need this ...
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0 answers
45 views

TMS320F28375Dpzps JTAG Communication Problem?

At the moment I am trying to run the TMS320F28375Dpzps . I use Jtag as TMS320-XDS100v3_UM-336636 and the program Code Composer to communicate with the Micrcontroller. The JTAG (picture: JTAG) and the ...
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3 votes
1 answer
51 views

Simulation Error in Circuit Lab with 2 Dependent Sources

simulate this circuit – Schematic created using CircuitLab I'm practicing some problems and came across this circuit. It asks for the Thevenin equivalent with respect to terminals A and B. I ...
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0 votes
1 answer
47 views

Error " Too few nodes: draw " for my simulation High-side driver VN820PT-E

I get a model error in LTspice from adding a high-side driver, VN820PT-E for my library. But after simulation, I have an error message. " Too few nodes: draw " . I don't understand this ...
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0 votes
2 answers
80 views

I keep getting this error but don't know why "Invalid input. - input required but omitted"

Please help me by checking if my program is correct or giving the correct ladder program. I keep getting "Invalid input. - input required but omitted" this error for all the variables in ...
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0 votes
0 answers
39 views

occasional EEPROM corruption in phyCARD

I am trying to find a root cause for corrupted EEPROM in phyCARD PCB. PhyCard is so called "System on Module". You can find some more info here: https://www.phytec.eu/product-eu/system-on-...
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0 votes
0 answers
42 views

Getting an error in Proteus while simulating the following circuit

I have built a circuit with a series of bandpass filters to detect specific frequencies. While simulating the circuit on Proteus, I was getting the following error. I tried looking for a solution to ...
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0 votes
1 answer
178 views

Total voltage error at the output of the Op-Amp

I have this circuit (shown below), I need to calculate the total error voltage at the output of the Op-Amp due to R3 and Vos. U1 is the LM741, which has Vos = 5mV and ib = 80nA. Till now I’ve ...
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0 votes
1 answer
69 views

Solution to unknown function 'v' for a voltage source in LTspice?

I have been getting this strange error. Has anyone else experienced this kind of error beforein LTspice?
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2 votes
2 answers
129 views

Microchip's pic-as throws syntax error on macro define

I have a file with a name like xxxx.asm in it I have: InitPORTA MACRO pic-as throws a syntax error on this line. The code ...
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0 votes
1 answer
55 views

Re-annotation from pcb now means my components are linked with different designators

After placing my components I re-annotated from the PCB to get positional annotation. This worked fine. But I've just noticed that components on my PCB and schematic (whilst linked, i.e I can click on ...
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  • 539
0 votes
2 answers
118 views

How should endpoint report error for TLP over PCI Express (PCIe)?

On a Windows system there is a PCI Express (PCIe) endpoint device with an application design that handles TLPs from Windows. The design is being updated, and I want to leave out some previous ...
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  • 529
-1 votes
3 answers
185 views

Why does the dynamic error of a low pass filter decrease when adding a load at the output?

I have this anti-aliasing low pass filter where R = 100Ω and C = 3.62μF. When the input has a frequency of 50Hz, Vin(t) = sin(2π*50t), I have worked out the dynamic error and found that the maximum ...
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0 votes
0 answers
37 views

adapter to correct wrong pins DFN 10

I had some boards made and assembled, but made a mistake with a DFN 10 part, and reversed two pins in the layout. How do I fix it? Should I remove the part and create and insert an adapter board to ...
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0 votes
0 answers
386 views

STM8 Programming Error using STVD

I am using a STM8S105C6T6 in one of my application and I am facing problem while programming it. Software used: STVD version 4.3.12 Compiler: Cosmic CXSTM8 Special Edition 4.5.1 (Free 1yr License ...
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1 vote
0 answers
188 views

Follow-Up: LTSpice “Error:undefined symbol in:” problem

Thanks to those who have provided helpful answers on the original post. I've tried @Ernesto 's suggestions, but I must not be implementing them correctly as I'm still receiving similar errors. Please ...
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0 votes
0 answers
1k views

Quartus Prime Lite: Error (209053): Unexpected error in JTAG server -- error code 35 and Error 202940 Can't access JTAG chain with SSH

Today I received a Terasic USB Blaster and I want to program an Altera 10M04SCE144C8G FPGA. I am using the Intel Quartus Prime 20.1.1 Lite Edition installed in Ubuntu 20.04. This FPGA has already been ...
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1 vote
3 answers
501 views

How does the 4th satellite in GPS know the time offset?

Going through the working of GPS technology, I came to know that at least 4 satellites must be visible to solve for the location with considerable accuracy. Going through most of the resources, I can ...
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  • 1,069
0 votes
2 answers
57 views

LDO - DC Accuracy Error Calculation (Datasheet vs Theoretical question)

I'm looking at calculating the DC Accuracy of a couple LDOs and came across some good resources - but I'm having trouble linking their example calculations to the "real world." [TI LDO] ...
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0 votes
1 answer
70 views

LTSpice error: Time step too small

I am trying to simulate the Buck Converter LM22676 from TI for a 5V output. But LTSpice shows an error saying that the time step is too small when I try to run a transient analysis. Can someone please ...
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0 votes
2 answers
114 views

Why is my EEPROM not working?

I have a 24FC01, 1 kbit EEPROM on my board. The SDA and SCL lines are pulled up to 3.3V through two 2k resistors. I'm using a STM32F407 MCU to read and write data to the EEPROM. Using the HAL ...
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-1 votes
1 answer
180 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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0 votes
1 answer
113 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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0 votes
1 answer
58 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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0 votes
3 answers
713 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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