The joystick is wired as described in the image below. This finally gives us a value between -512 to +511. The return value is between 0-1023, the mid point is 512, so we subtract 512 from the ADC reading. The measurement can be easily done by using our ADC libraries’s ReadADC() function. The output of the two variable resistor of the joystick are connected connected with the two channels of ADC. This can be easily done by using the ADC of AVR Microcontroller. Interface with AVR Micro.Īs told above the position of stick can be determined by measuring the voltage from the output of the two variable resistor of the joystick. By measuring the voltage output of two variable resister from which the joystick is built, we can determine the position of stick in x and y axis. The output voltage is between Vcc and GND depending on the position of stick. Each variable resistor has three pins, two extreme pins are connected to Vcc(5v in our case) and ground. Turning magnitude can also be controlled in the same way by moving the joystick left or right.Īnalog joystick has two variable resistor for two axis. Similarly you can control the speed of robot while making a reverse motion. You can push the joystick further up to increase the speed of forward motion faster. For example you can push the joystick little forward to make you robot start moving forward slowly. The type of joystick we are using in this article is an Analog Joystick that means it can give the magnitude of motion along with the direction. The y axis is used to move the object forward and backward, while the x axis is used to turn the object left or right.

For this we use a common joystick with two axis. Generally we want to control the back and forth motion of any object along with the ability to make it turn left and right. Joystick give a very realistic two dimensional control! Joystick are also used to control the motion of real objects like a robot or a car. In games a joystick is generally used to control the motion of character or a vehicle (like plane or car). If you have played games on console you must be knowing what a joystick is.

Joystick library for proteus 8