Description

The LM3914N is a versatile LED bar graph display driver IC designed to drive up to 10 LEDs in either dot mode or bar mode. It is commonly used to create voltage level indicators, battery level displays, audio level meters, and signal strength indicators.

This integrated circuit converts an analog input voltage into a corresponding LED display, eliminating the need for multiple resistors and complex driver circuits. The LM3914N provides linear LED indication, making it ideal for precise monitoring applications.

With its simple interface and adjustable reference voltage, the LM3914N is widely used in electronics projects, Arduino systems, power monitoring devices, and audio equipment.

Key Features

• Drives 10 LEDs directly

• Supports Dot Mode or Bar Mode display

• Linear analog voltage indication

• Adjustable reference voltage

• Low power consumption

• No additional resistors required for LEDs

• Simple integration with microcontrollers

Applications

• Battery level indicators

• Audio level meters (VU meters)

• Power supply monitoring

• Signal strength indicators

• Arduino and Raspberry Pi projects

• Voltage measurement displays

Specifications

• Model: LM3914N

• Type: LED Display Driver IC

• Number of Outputs: 10 LED outputs

• Display Modes: Dot Mode / Bar Mode

• Input Type: Analog Voltage Input

• Operating Voltage: 3V – 25V

• Package: DIP-18

• LED Current: Programmable