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Recent content by andre_luis

  1. andre_luis

    something strange happened during a storm with my UPSes

    Many of these cheap UPSs operate by default having the output connected directly to the mains input via an internal relay, which means that the minor noise in the mains will pass almost entirely to the power supply of your PC; in other words, these equipment meet the cost requisite, but not the...
  2. andre_luis

    [SOLVED] LTSpice Simulation error

    What do you see there on the 1st picture close to the Q1 designator?
  3. andre_luis

    [SOLVED] LTSpice Simulation error

    As there are few 'complex' components above, you could replace one by one to check which one is raising this error. My guess is something related to the ldevice ibrary, try using a standsrd one.
  4. andre_luis

    Posting Issues

    Just now, another admin member, EastbayA (not involved in programming stuffs) replied there on the staff section promising to be more present here, at least is someone from the magazine scope, wich at first sight take care of the reputation of the products of WTWH brand (I've often seen her...
  5. andre_luis

    Posting Issues

    The Admins update is that the server was restarted due 'xyz' reasons (technical stuffs, whatever) and they will be more attentive from now on to give us prompt updates, hopefully.
  6. andre_luis

    DAC MCP4725 controlled by STM32F103C8: Simulation not working properly

    You did not mention what MCP4725x variant you are using. Depending on which one, the device address may change and therefore the code itself ( #define MCP4725 ... ). I guess it is available by double-clicking the component as a configurable option on Proteus schematic.
  7. andre_luis

    edaboard server issue ?

    Yes, after contacting Edaboard admins, the feedback given to the moderators was that they had installed a feature on the server ( shared among other corporation domains ) that was overloading other services; By the way, for some reason they were not notified of the activity on the private forum...
  8. andre_luis

    SMPS Voltage Drift Problem (TL431)

    You could consider make experiments with the LM4041, which if I'm not wrong is pin compatible with the TL431, and have a significantly smaller tmperature drift.
  9. andre_luis

    Build succesfull in MPLABX but its displaying the Character in GLCD

    In addition that the standard call for character arguments are supposed to be enclosed within apostrophes ('), not raw as done above: Glcd_DisplayChar(W); Glcd_DisplayChar(O); Glcd_DisplayChar(R); Glcd_DisplayChar(L); Glcd_DisplayChar(D);
  10. andre_luis

    Why a popular circuit for opto-isolating 24 V inputs to 5V/3.3V is a divider before optocoupler LED?

    Considering that the above circuit is an interface used on the automation scope, where distinct GNDs are often used for the general logic, for input and output, it makes a lot of sense that an additional function of the resistive divider is to protect the optocoupler against overvoltage, in this...
  11. andre_luis

    Do you have an open source electronic clock project?

    There are numerous blogs with specific circuit examples, I don't think you'll find somewhere any repository with a pool of general examples, so consider making specific searches on the Web; anyway I would advice to start with the basic if the purpose is to learn. Be aware that Proteus is not...
  12. andre_luis

    Learning STM32 + LCD Interfacing code not working

    At first sight seems a bit confusing all the cumulative 4 and 8 bit shifts on the variable LCD_Data inside the LCD functions. Furthermore, this is the funtion argument, you should assignt to a local variable instead of updating it. BTW, it is very bad practice ( in addition to start in capital...
  13. andre_luis

    can i use a variable flag as trigger like high priority Interrupt

    Since by definition both ISR and Main() are functions asynchronous to each other, it is necessary that the value of the variables manipulated by the interrupt service have a specific entry point into the main program. In other words, the ISR update specific temporary global variable(s), and the...
  14. andre_luis

    6th order polynomial expression

    As Tony well illustrated above, the dataset has a discontinuity in the slope of the curve, something that opposes the behavior of natural phenomena, which indicates a measurement failure. The higher the order of the polynomial or the 'better' the fitting input data curve, the more your model...
  15. andre_luis

    ESP32 OTA Partition schemes: Arduino IDE

    Something I forgot to mention is that as you I also use a significant amount of resources, but the size of my binary is currently 1.44M, which in this case, a partition like yours would not meet; the partition I have mentioned in other hand do meet, but my original concern was to know if they...

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