ADXL203 Accelerometer Display on 15 LED’s Bargraph

The Circuit senses analog voltage from ADXL203 Tilt/Accelerometer sensor and drives 15 LEDs. providing a linear analog display. This ADXL203 Accelerometer project shows, how to read an analog input on analog pin A1, and print it out to 15 Bar-Graph LED’s. The board is Arduino compatible and hold ATmega328 chip , 15 LED’s with 330 Ohms resistors. Supply 5V DC. Details of ADXL203 sensor board  can be found here.


The ADXL203 is a high precision, low power, complete dual-axis accelerometer with signal conditioned voltage outputs, all on a single, monolithic IC. … The typical noise floor is 110 μg/√Hz, allowing signals below 1 mg (0.06° of inclination) to be resolved in tilt sensing applications using narrow bandwidths (<60 Hz).

Arduino Pins

  • LED 1-15>> DO, D1, D2, D3, D4, D5, D7, D8, D9, D10, D11, D12, D13, A0(14)
  • ADXL203 Accelerometer Sensor>> Analog Pin A1

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