Design and implementation of an automatic balance tray with an accelerometer, four servo motors and a MCU

When people lift up a tray with trembling hands, it is easy for them to spill their drinks and soups. In this paper we design an automatic balance tray (ABT) which uses an accelerometer module, a MCU and four servo motors. This accelerometer module will automatically detect the angle of the tray and the MCU will control the servo motors and immediately rotate in the opposite direction of the tray to balance the tilting tray.