Joystick 3 Click Board™

Product Code: MIKROE-5378

How Does The Joystick 3 Click Board™ Work? The Joystick 3 Click Board™ is based on the 2765, a high-quality mini 2-axis analogue-type thumbstick from Adafruit Industries. This type of joystick has a self-centring feature that allows it to centre itself the moment when you release the joystick. It also contains a comfortable cup-type black knob/cap, which gives the feel of a thumbstick, making it very similar to the 'analogue' joysticks on PSP joysticks, suitable for numerous applications as a human-machine interface. The Joystick 3 Click Board™ comprises two 10kΩ potentiometers, one for up/down and another for left/right direction, used as dual adjustable voltage dividers providing 2-axis analogue input in a control stick form. With the joystick fully assembled and functioning, the voltage will follow the motion of the thumbstick as it is moved around. The measurements of the potentiometer resistance change are needed to read the joystick's physical position. That's why the MCP3204, a 12-bit A/D converter from Microchip, connects the joystick with mikroBUS™ using a simple serial interface compatible with the SPI protocol to determine the value of the joystick's X and Y.

As the MCP3204 has a resolution of 12 bits, the values on each analogue channel (axis) can vary from 0 to 4095. So, if the stick is moved on the X axis from one end to the other, the X values will change from 0 to 4095, and a similar thing happens when moved along the Y axis. The value of the joystick staying in its centre position is around 2048. Also, the MCP3204 is capable of conversion rates of up to 100ksps. The Joystick 3 Click Board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. However, the Click board™ comes equipped with a library containing functions and an example code that can be used, as a reference, for further development. SPECIFICATIONS Type Pushbutton/Switches Applications The Joystick 3 Click Board™ be used for numerous applications as a human-machine interface device (HMI), robotics, and other control interfaces On-board modules 2765 - mini 2-axis analogue-type thumbstick from Adafruit Industries Key Features Low power consumption, high quality, high mechanical and electrical durability, self-centring feature, 2-axis, SPI interface, and more Interface SPI Compatibility mikroBUS Click board size M (42.9 x 25.4 mm) Input Voltage 3.3V PINOUT DIAGRAM This table shows how the pinout of the Joystick 3 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns). Notes Pin Pin Notes NC 1 AN PWM 16 NC NC 2 RST INT 15 NC SPI Chip Select CS 3 CS RX 14 NC SPI Clock SCK 4 SCK TX 13 NC SPI Data OUT SDO 5 MISO SCL 12 NC SPI Data IN SDI 6 MOSI SDA 11 NC Power Supply 3.3V 7 3.3V 5V 10 NC Ground GND 8 GND GND 9 GND Ground ONBOARD SETTINGS AND INDICATORS Label Name Default Description LD1 PWR - Power LED Indicator JOYSTICK 3 CLICK ELECTRICAL SPECIFICATIONS Description Min Typ Max Unit Supply Voltage - 3.3 - V 2765 Potentiometer Resistance - 10 - kΩ ADC Resolution - 12 - bits Operating Temperature Range 0 +25 +80 °C