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  1. B

    How to make the brightness of the LED change?

    Thank you very much, that's a very detailed tutorial! I'll try to modify this code and understand what it means, thank you again!
  2. B

    How to make the brightness of the LED change?

    Yes I will, thank you very much!
  3. B

    How to make the brightness of the LED change?

    Thank you very much for the suggestion, I installed this library in my Arduino IDE, do you have some sample code? Or which example from this library should I choose to learn?
  4. B

    How to make the brightness of the LED change?

    I have done a preliminary effect of the project, now it is still missing to control the LED brightness change by clicking the number + or number - of the touch screen. When I click on "+" I want the LED brightness to get brighter and brighter as the number increases and conversely decreases. Is...
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    Problems with PCB layout

    I've been thinking about changing the software I use recently, and after hearing you say that, I think Kicad is a good choice.
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    Problems with PCB layout

    In addition to the components on the schematic, can I also add my own components? If can do it, how to add?
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    Does 1/4W metal film resistor have a resistance of 100M ohms?

    Ok, thanks for the suggestion, I will think about this circuit again.
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    Does 1/4W metal film resistor have a resistance of 100M ohms?

    Thanks for your reply, I will probably abandon or redesign this circuit.
  9. B

    Does 1/4W metal film resistor have a resistance of 100M ohms?

    It is indeed a bit high, I got this schematic from a friend.
  10. B

    Does 1/4W metal film resistor have a resistance of 100M ohms?

    I looked around and did not see this resistance value. Is there a 100 megohm resistor for a higher power? In the circuit below, under the amplifier, there is a 100M resistor. In the purchase of components, I do not know how to buy them. Usually, I use 1/4W metal film resistors.
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    Problems with PCB layout

    PCB layout, in addition to the components on the schematic, can also add their own components? For example, digital ground, analog ground, single-point ground 0 ohms resistor, and magnetic beads, test points, etc. These are on the schematic diagram, or that the PCB layout engineer additionally...
  12. B

    WIFI/Bluetooth Module

    I didn't choose to add this module when I purchased it because I didn't need this feature at the time, but now I need it and I have to solder it myself.:(
  13. B

    WIFI/Bluetooth Module

    The back of my LCD module is the circuit board, I see the circled area in the picture is the option of wifi or Bluetooth module, my recent project requires me to use wifi, which module will be the most suitable? Pictures are uploaded as attachments.
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    Tap on the LCD does not respond

    Maybe so, but it worked after I did this, and connecting the STM32 and then tapping the screen had a response.
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    Tap on the LCD does not respond

    My arduino is fine because I changed the interface on the LCD to TTL when I used the arduino. when I use the same LCD to connect to the STM32, the interface of the LCD is still TTL at this time, then I need to change it by initialization. Calls the hal library, which is a structure for uart...
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    Tap on the LCD does not respond

    At the beginning of everything, there is the initialization code, GPIO initialization, and so on, through which you can change the TTL or RS232.
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    Tap on the LCD does not respond

    Maybe I can do the level conversion by code?
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    Tap on the LCD does not respond

    Sorry for the somewhat late reply, I've posted the circuit diagram as an attachment.
  19. B

    Tap on the LCD does not respond

    I looked carefully and found that my interface is not connected correctly, my LCD is an RS232 interface by default, when I use Arduino I solder it as an TTL interface, my STM32 should be using RS232 interface, I did not connect the adapter board, so it may lead to no response when connecting STM32.
  20. B

    Tap on the LCD does not respond

    Do you mean the chip? The chip of the STM32 is CKS32F303
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