LM3915N DIP IC

The LM3915 is an audio controlled LED driver IC, meaning it can control (turn on or off) 10 LED lights based on an analog input voltage of the audio signal. As we know the voltage value of an audio signal varies based on the amplitude of the signal, this amplitude is directly proportional to the loudness of the audio signal. Thus by making the LEDs glow with respect to the amplitude of the audio signal will help us visualize the audio signal.

Specifications

• Analog Controlled LED Driver IC with Logarithmic output

• LED incremented by one step for every 3dB

• Monitor upto 30dB using 10 LEDs

• Number of controllable LEDs: 10

• Operating Voltage: 3V to 25V

• Reference Voltage: 1.2V to 12V

• LED sink current: 1mA to 30mA (programmable)

• Both Dot/Bar mode available

• Available in 18-pin DIP, PLCC package