fraryb

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Latest activity by fraryb

  • fraryb created a post,

    NHD-C0220BiZ-FSW-FBW-3V3M I2C not working.

    1. Community
    2. Character LCDs

    Having problem getting display to respond to I2C commands.  Changed pullups over range from 27k down to 4.7k ohms and over 400kHz down to 10kHz without success. Can get response to enumeration quer...

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  • fraryb commented,

    1. Community
    2. Character LCDs
    3. NHD-0420D3Z-NSW-BBW-V3 back-light flickers

    The LED back light requires a series resistor to limit current to 30mA or less as specified in the data sheet. The LEDs are probably overheating if you use a constant voltage rather than a constant...