Viewing 4 posts - 17 through 20 (of 20 total)
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  • #10030
    Just4Fun
    Participant

    I see from the schematic that you used a resistor from 270 Ohm in serie al led. At 5V and if the led is red they mean about 12mA. Tantini for a led “modern”. Normally today the resistance is dimensioned for 1-4mA, depending on the type of led and how much you want to make it bright.

    #10034
    Picmicro675
    Moderator

    Agreeing to the same opinion. Modern LEDs don't need 20 mA to be bright. But I think there is the specific when they want to buy, must be those defined as ULTRABRIGHT.

    #10532
    Alexis Mori
    Participant

    Hi…In 4 bit mode, the have and the LCD must stay in snack match up. In the event that they lose snack match up with each other, it’ll never recuperate so the LCD will begin to see rubbish commands. The as it were way to recuperate is to re-initalize the LCD employing a uncommon 3 command sequence to urge back into sync. This is drained the code in begin() If you control cycle the LCD but not the Arduino that won’t offer assistance since the default control up mode for the LCD is 8 bit mode. So on the off chance that the library is in 4 bit mode and you control cycle as it were the LCD, the have (arduino) and the LCD will not be within the same mode (LCD in 8 bit mode, have in 4 bit mode) and the LCD will see trash commands.

    #10540
    Picmicro675
    Moderator

    The thread is referring a particular compiler which has nothing to do with Arduino and Processing compiler.
    In four bit mode, some time is necessary to reset the LCD, because lost of synchronization, perhaps due by electrical noise on the lines.

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