An expensive liquid crystal display is not necessary for displaying data in most applications instead a seven-segment display is simply sufficient.

In this project, you will be building an object detection DC motor controller.

You can connect Arduino sensors, actuators, and other ICs with the digital inputs and outputs (digital I/O) on the Arduino for useful things, such as reading switch inputs, lighting indicators, and controlling relay outputs.

It's easy to make a digital voltmeter with an Arduino and a 16x2 liquid crystal display (LCD). This project will also help you measure voltages above the reference voltage using a voltage divider.

Using an infrared light sensor enables your Arduino to receive and decode signals from a TV remote control.