This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

LM3914: No signal is input. But the LED lights up.

Part Number: LM3914

  • Hello,

    Input signal at pin 5 is not supposed to be left floating/open and it should always be driven with a voltage level. This is a high impedance input and if left floating, any noise/residual signal has the potential to cause erratic behavior of the LEDs.

    Kind Regards,