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The process of identifying, quantifying, and correcting errors in the operation of a system

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Following my last post (How do I establish if an op-amp is bad?) I have now attempted to map out a schematic for the circuit I am really now struggling with. Attached is the circuit diagram. It is my ...
Andyg's user avatar
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I have been facing a major issue on my board. The board is about Vin that is 4.5 V, and Vout is 100 V using a flyback converter, H-bridge inverter high-voltage mux. STM32 is used for multiple MOSFET ...
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Using an STM32 uC debugger, and from binary 0111 I want to obtain 1110. And to do so, I use left shift operator as follow: ...
GNZ's user avatar
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I'm using a Nucleo F429ZI board and programming it on System Workbench. I've been trying to setup a bare-bones project by removing almost all startup code which is created by default, including all ...
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I am a newbie to FPGA development. Any help will be highly appreciated and please forgive me in advance if the question is too obvious. The board is Chipwhisperer 305 artix-7 fpga. Used tool vivado ...
TANZIL's user avatar
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For a school project I've designed a PCB on KiCAD around STM32F401RBT6. The design is based on what I designed before and the application notes. It is powered through the USB port and should be ...
Ciguli's user avatar
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I am trying to implement a USB to serial bridge using an FT231XS to program an ATmega over USB using Optiboot. My breadboard is exactly the application circuit for a bus-powered application (it draws ...
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I am trying to figure out why the 7-segment display at the top part loops back to 9 when the timer reaches 0. I want the timer to display 0 whenever it stops. What kind of adjustments should I make to ...
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I am aware that when one remains lit, it is indicative of the part of my system that can't be initialized; it's helped me with several builds. However, I can't help but notice that even in a perfectly ...
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I'm working on creating a phase shift oscillator that uses a common emitter BJT as the amplifier. I designed the circuit so that it produces a sine wave with a frequency of roughly 25kHz and peak to ...
snowball's user avatar
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Guys I have an issue initializing ST7789S LCD driver for RGB connection. IM0: 0; IM1: 1; IM2: 1; DOT clock: 7MHz. Also this is my LTDC configuration: Here is my code: ...
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This is a photo of an old video board from a Dell display showing "No Cable", and "No Signal" OSD messages but working correctly when video is force-enabled and EDID is supplied ...
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I am trying to control a stepper motor following a description. I have the exact same elements. I do not have any tension on the down-right pins (they are supposed to be 5V and power the RPi). I ...
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Here is the rough set up of the system: Relays used 1-1393277-4 (https://www.farnell.com/datasheets/2243264.pdf ). The way the set up works is when the battery is turned on, there is a micro (not ...
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Objective To achieve a 12-hour interval between 30-minute runs (on for 30 minutes, off for 12 hours). Circuit On (foolishly) thinking that this would be implemented more simply using discrete ICs as ...
perhapsmaybeharry's user avatar
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I started to examine the behavior of the converters on my custom board. The input to the converter comes from an external supply with a voltage of 20 V, the required output voltage is ~12 V. When I ...
Knowledge's user avatar
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Due to the limitation of UART pins available I built a board using the esp3-mini-1 module that can only be programmed using JTAG (through Segger J-Link programmer), but I were unable to flash it (...
A.I.A.W's user avatar
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Two questions and I would like to hear the explanation: Is there any issue to apply the positive voltage before the negative? (op-amp with +/- 5 V) Is there any issue to apply input voltage before ...
Knowledge's user avatar
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CONFIDENTAL CIRCUIT I'm experiencing some weird behavior though that I don't understand. When I send from FPGA 1 V to turn it on it doesn't working I deliberately chose NMOS with low Vgs voltage. I ...
Knowledge's user avatar
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I got a Lolin S2 mini development board, featuring an ESP32 S2. We're building a follow-me robot. The DC motors are controlled by this motorshield via I2C. The motorshield requires a modified library....
nikscha's user avatar
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I am using ESP32-C3 module and I want to debug my code through USB/JTAG. For USB interface I have used TYPE C connector with ESP32-C3. Connections are as follow but the device does not get recognized: ...
meet10's user avatar
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I was trying to understand what wrong about the output of the level shifter, the level shifter is part of my circuit that I trying to bring-up and encountered difficulty in this issue. This is the ...
Knowledge's user avatar
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I have designed board that carrier transmitter HDMI module. There are TX side and RX side, the board works well except one issue that which takes a lot of sleepless days from me. this is the ...
Knowledge's user avatar
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I am desiging a PCB that includes an ESP32. I have question about strapping pins of the ESP32-WROOM-32E. My design is suitable below picture only for GPIO 0,GPIO 12,GPIO2 pins. Unfortunately, I have ...
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I have an old TIG welder that uses a relay to HF (High Frequency) start. I had a problem with it about a year ago and cleaning seemed to work, but now it's not even getting 12VDC to it. Here's the ...
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Chip in Question: ON Semiconductor - MC14504B Datasheet Link: https://www.onsemi.com/pdf/datasheet/mc14504b-d.pdf Issue at Hand: I am intending to use this chip alongside Arduino Mega 2560. When I ...
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Can anyone advise why my actions described below do not work?: I have been trying to run the code snippet from the post Can Cortex M4 data watchpoint trigger an interrupt without a debugger? on(...
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We have a design using 4 EM2130L02QI dc/dc converter all with very similar routing and component placement. the output gets shorted to GND and never changed. The same board that contain with another ...
Knowledge's user avatar
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3 votes
1 answer
327 views

I'm trying to implement an inverting Cuk DC-DC converter on a 2 layers PCB, in order to generate a -3.3V rail from 3.3V, but the circuit affects greatly the input rail. The 2 rails are used to power 4 ...
Luca Daidone's user avatar
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10 votes
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Sorry for my noob question. I am very new to debugging hardware circuit boards. A circuit board was not working. After measuring a voltage rail it was jumping from 12V to 0V, and back to 12, etc. what ...
TheGamingGiraffe's user avatar
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1 answer
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I am currently using a NUCLEO-WL55JC board. However, I could not initialize the logic analyzer because of the error "Trace: No Synchronization". I am programming it as single-core (Cortex M4 ...
Faruk UNAL's user avatar
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3 votes
1 answer
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I have a system which transmits 1 Gbps single lane MIPI video over several flex circuits. Where each flex circuit connects to its neighbour, I have placed a MIPI repeater chip: SNx5DPHY440SS. At the ...
Rocketmagnet's user avatar
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If it run arm-none-eabi-gdb -tui myProject.elf This returns TUI mode is not supported If I run it without the -tui flag and ...
Edwin Fairchild's user avatar
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I'm observing a strange behaviour in some of my PCBs: they start working only when I spray isopropyl alcohol on them (or, to be more specific, the boost converter starts doing his job only after I ...
sgrc31's user avatar
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3 answers
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I want to add a debug serial output port to a device that's sealed in epoxy. I plan to use one of three existing 3mm LEDs (red 617nm, green 568nm, or yellow 588nm), ±30° angle, that emerge from the ...
fgrieu's user avatar
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I have a mid-2012 Macbook Pro Retina, and over the years I notice that when I wipe my finger along the surface of the chassis (like when wiping off dust), I sometimes feel a vibrating effect, a more ...
andyras's user avatar
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26 votes
1 answer
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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 ...
Levente's user avatar
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1 answer
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I am working on a mobile robot that includes motors, proximity sensors, encoders, and MCU. I am powering my MCU CC1350 Launchpad using the onboard power supply. The IDE I am using is Energia IDE, ...
user274774's user avatar
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0 answers
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I am getting the following error from the STLinkReglasher program while converting the standalone ST-Link V3 debugger into J-Link. ERROR: Cannot find an ST-LINK, multiple ST-LINKs plugged in, or ST-...
No Man's user avatar
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0 answers
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I am new to JTAG debugging and have already got a Flyswatter 2 unit with me. This is my first experience with any JTAG debugger so I am not really sure what to look for to find if its compatible with ...
InsaneCoder's user avatar
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1 vote
1 answer
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I’m developing a new version of a custom debugger board for my project. The debug target is a solar powered device, which means sometimes I want to power it from the host (debugger) and sometimes I ...
Jakub Nagy's user avatar
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2 votes
1 answer
7k views

I would like to view and analyze the registers in STM32 Embedded Cards(For Ex. STM32F407DISK) in STM32CubeIDE. As far as I know from the user manual and my own experience in CubeIDE, I did see my ...
OJazz's user avatar
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1 answer
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I'm using a LM4565FV-GE2 opamp to amplify the sine signal generated by an AD9837 DDS chip, but the opamp output is stuck at around ~11.5V. I'm using a DS3502 digipot to control the gain, represented ...
Christopher Moore's user avatar
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1 answer
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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 ...
Ben's user avatar
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1 answer
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Background I'm trying to make a circuit to determine rotor angle of a motor using a resolver https://en.wikipedia.org/wiki/Resolver_(electrical). This involves generating a ~5-10kHz sine wave to drive ...
JeffB's user avatar
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1 vote
1 answer
589 views

I wrote a UART receiver similar to Nandland's example. To verify that I am receiving and processing data (coming from my PC through Putty), I wrote a design that would correspond certain LEDs to ...
Andrew's user avatar
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1 vote
0 answers
234 views

Is it possible to use the ST-LINK V3 to program and debug STR7 Familiy chips? If not, what programmer can I use?
RenX's user avatar
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3 votes
1 answer
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While trying to access the CR50 chip in my Dell Latitude 7410 Chromebook, I tried making my own Suzy-Q cable because no online store seems to have some in stock. I bought some USB breakout boards, and ...
geckoflume's user avatar
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3 votes
2 answers
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I own a brand new PICkit 4, and I'm trying to get a debug session working. This is what I did: 1. Cut reset pin from the USB-UART programmer. There is a Reset EN pad that can be cut off to isolate the ...
Antonio Davila's user avatar
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3 votes
1 answer
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The following circuit, taken from this answer seems to give odd results when doing a parameter sweep simulation on CircuitLab. Is the problem with CircuitLab, or is there some problem with the circuit ...
Math Keeps Me Busy's user avatar
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