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Type: Posts; User: andre_teprom

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  1. [PIC]Closed: Re: I wrote simple code buttons to rotary for PIC12F509, but it works only on simulat

    As said above, yur code have a lot of blocking instructions that blinds the program for a while preventing from reading the actual encoder, for which we should just guess it have a resolution of...
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    Closed: Re: LCD 16*2 Data Sequence Flow chart

    Have a look on datasheet pinout waveforms of the LCD you are talking about (presumably based on the HD7780 chipset) and you will have a better understanding of the whole process, it just describes...
  3. Closed: Re: Connect MQ135 Gas Sensor to Raspberry Pi 3B+

    Keep in mind that the 5v available at the PI connector header is not intended to supply external devices, but rather to use with external pullup resistors or any other circuits that do not demand too...
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    Closed: Re: Programming 328P with XPLAINED Mini

    You did not specify what toolset you are using to compile/develop your program, but if it were Arduino (which I assume being not the case), you could write the "Arduino as ISP" demo code that allows...
  5. Closed: Re: Connecting RS232 out to raspberry pi through cp210x.

    Ok, now I got, so if you want to use the USB, there is no need to have any TTL converter between both sides; Don't seem this would suffice?



    Anyway, from the RPI side, this USB interface would...
  6. Closed: Re: Connecting RS232 out to raspberry pi through cp210x.

    Ok, I had overlooked this, anyway your original approach is not correct...



    You need just an RSR-232/TTL converter, something like this:



    *Once the RPI's I/Os dedicated to Serial port are...
  7. Closed: Re: Connecting RS232 out to raspberry pi through cp210x.

    You did not provide enough information about what is the electrical interface of your Logger (RS-232/ TTL, USB), BTW there are many approaches; as the first (and quick) attempt, I would suggest using...
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    [SOLVED]Closed: Re: EPSON M-T532 on Arduino Uno

    In the assumption that printing/cutting tasks are made asynchronous each other, did you try to add some delay right before the cut command, just to make sure there wasn't enough time to print all the...
  9. Closed: Re: PIC1F1508 with four PWM outputs operating at different frequency?

    If the frequencies are multiple integers as you said (2x, 4x, 8x) and if the output lowpass filter circuit is properly sized, at first sight there is no impediment to do that as long as the signal to...
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    [SOLVED]Closed: Re: ACS712-5A AC Current Reading - How to?

    ...moreover, with the above code it is being hold the maximum peak-to-peak, not updating with further smaller values.



    You should compute the average value (sum divided by amount of samples);...
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    [SOLVED]Closed: Re: ACS712-5A AC Current Reading - How to?

    As clearly stated there, it is a transformerless circuit designed to do the same job of a current transformer, so it has the same issue regarding the rectifying output diode.
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    Closed: Re: problem with arduino

    You are cascading the output of one chip into another input, which in an offboard arrangement like using Arduino can mean a degradation in signal quality; By the way, you have not shown any detail of...
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    [PIC]Closed: Re: XC8 XLCD with PIC18 error

    It is worthy to try adding an while(BusyXLCD()) command after each XLCD access just to check if you are having timing issues.
  14. [PIC]Closed: Re: PIC16F1934 Timer0 and some other stuff

    Unless I overlooked something, you did not mention what compiler you are using. Most often an interrupt vector is defined preceeded with a '#' directive. The way you did, it was nothing else than...
  15. [PIC]Closed: Re: PIC16F1934 Timer0 and some other stuff

    Once you are apparently using interruption with just one timer, checking the interrupt flag right after entering into interruption vector seems unnecessary, there it is supposed to be set as 'true' ....
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    [SOLVED]Closed: Re: Ground plane in audio amplifier?

    it is likely being not self oscillation as you think, but rather a bare injection of EMI ( e.g , from mains ) through your fingers.
  17. Closed: Re: Energy doesn't FLOW the way you THINK! (Electrodynamics)

    Each model of representation of a physical phenomen is appropriate to the school level in question. For example, quoting the Poynting vector makes sense only when the student is familiar with the...
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    Closed: Re: Altium Width Rule Issue

    You can consider making rules that are applicable for specific devices only, with the Query Builder feature available either on Schematic or PCB scopes. The `PartDesignator` parameter is one...
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    Closed: Re: Pic32 qei interrupts

    In general interupts are not used with QEI registers, but rather with Timers; we want to take the current position at fixed intervals and then calculate the speed or just check whether certain...
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    Closed: Re: reason for 50 Hz ac current

    Instead,



    There is currently a plethora of equipment which extracts samples from the network mains in order to synchronize their PLLs (e.g UPS, TV, etc...), and therefore however much the...
  21. Closed: EPLAN: How to represent bundled connections of a cable?

    Does anyone have any tips on how to make a visual representation of a cable in a multiline diagram, bunching all the connections within a single line ( such as in Altium with the Bus Entry feature ),...
  22. Closed: Re: RC Filter for Web Based PWM Controller (NodeMCU + ULN2803)

    Although at first sight the motor 210mA lies within the specification of the ULN2803 datasheet - which is 500mA for each transistor - you will notice that there is a graph for the duty cycle which...
  23. Closed: Re: RC Filter for Web Based PWM Controller (NodeMCU + ULN2803)

    With regard to RC filtering, it would actually have some usefulness to reduce the generation of harmonics due to PWM switching on a typical reactive load like a Fan, but that would make sense only if...
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    Closed: Re: Learning psoc technology

    At a glance seems a good choice to start since this development kit is made with the CY8C5888LTI-LP097 microcontroller, which has built in either an A/D and D/A converter along with a considerable...
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    Closed: Re: Simple free mechanical drawing package?

    From what you said, there is not only one 3D format that you have to work with, and considering that the purpose is only to generate the 2D projections, it could be the case to consider exporting...
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