DIY 5-Axis Analog Joystick Controller With Arduino

HID reports contain structured data sent from device to host, including button states and axis positions. The report structure must match the descriptor definition exactly. Joystick-specific descriptors use usage codes: X-axis (0x30), Y-axis (0x31), Z-axis (0x32), and rotation about X-axis (0x33). Four buttons require one byte (4 bits) plus padding to 8 bits. Each joystick axis uses 8 bits signed integers (-127 to +127). Data packing combines individual sensor readings into the structured format, with ADC readings (0-255 unsigned) converted to signed range by subtracting 128. Buttons are combined using bitwise operations. The packed data is sent using usbd_hid_send_report. Testing verifies OS recognition and proper axis/button mapping through Windows Control Panel and online testers.

This extensive section demonstrates advanced USB HID mouse implementation on STM32F4 Discovery board. It covers configuring SPI1 for LIS3DH accelerometer communication, adding the accelerometer library files to the project, initializing the accelerometer with appropriate parameters (data rate, enabled axes, full-scale range), and reading raw sensor data. The tutorial demonstrates mapping accelerometer X and Y values to mouse movement by extracting high bytes and applying them to the mouse report buffer. Practical demonstration confirms the complete system works: rolling the board moves the computer cursor, and button presses generate left-click events. The section concludes by demonstrating how to use pre-existing USB HID report descriptors from online resources, showing copying a 3-byte mouse descriptor from an online source into the USB custom HID configuration file, updating the report descriptor size parameter to match the actual descriptor length, and confirming the device functions identically despite using a different descriptor format.

This section demonstrates creating a custom HID (Human Interface Device) for a gamepad using the RISC-V microcontroller. The presenter explains how to configure the device descriptor in the USB configuration, including device name, description, and button mappings. The presenter shows how to implement the HID report structure and send button states to the host computer. The presenter demonstrates a working gamepad that can be connected to a computer and sends button states, showing how to create affordable custom gamepads using RISC-V microcontrollers. The presenter also demonstrates USB device communication implementation, explaining the USB device structure with input and output buffers (64 bytes each), and shows how to send data to the host and receive data from the host.

The IO Mixer can emulate a USB gamepad device by setting the USB class to Virtual COM Port and Gamepad. Gamepad output nodes map RC inputs to gamepad axes and buttons. This allows using RC controllers for flight simulators or other applications requiring gamepad input. The system can map throttle, ailerons, elevator, rudder, and other controls to simulate realistic flight or vehicle operation.

This segment covers the complete software architecture for creating a USB HID gamepad. Key components include USB device configuration files (tinyusb_config.h, usbdescriptors.h) that define device type and capabilities, button state management using enums for consistent interpretation, abstract interface patterns allowing interchangeable input devices, GPIO pin reading for physical button detection, and HID report structures that package button states for USB transmission. The system uses a main loop that continuously updates and sends button states to the computer, enabling real-time game input.

This tutorial demonstrates how to manipulate 3D enclosures in DesignSpark Mechanical by adjusting cylinder diameters using the pool tool, resizing enclosure faces with multi-face selection, applying the draft tool to create angled shapes, and rounding edges using the edge control tool to achieve smooth transitions between different geometries.

Enclosure design uses 3D CAD software like Fusion 360 to create shells and mounting features. Component libraries from GrabCAD provide 3D models for standard components. Multi-color 3D printing enables aesthetic customization using different filament colors. Web-based configuration interfaces allow users to program key mappings through a browser, communicating with the microcontroller via serial connection. The system supports multiple profiles for different keyboard layouts. Configuration is stored in EEPROM non-volatile memory, ensuring settings persist across power cycles. The software is designed for cross-platform compatibility with Windows and macOS.

This comprehensive video demonstrates the end-to-end process of designing and manufacturing an ergonomic device holder using CAD and 3D printing. The project addresses a practical problem: small devices like gimbals require unnatural wrist positions that cause fatigue and compromise functionality. The workflow includes: measuring the actual device dimensions, creating a CAD model with proper proportions and structural reinforcements, designing mounting features for versatility, and optimizing 3D printing parameters (infill, support structures, bed adhesion). The process emphasizes iterative design refinement, physical testing for strength verification, and balancing aesthetics with structural integrity. The final product enables comfortable extended use while maintaining device stability.

Two free CAD software options are available for designing 3D printed enclosures: Youcat (available for download from the video description) and 123D Design by Autodesk (also free to download). The instructor notes that 123D Design is older and no longer supported but remains sufficient for most purposes.

Creating custom enclosures requires CAD design to translate measurements into precise technical drawings. When modifying existing products, designers must account for material differences—thicker wood requires larger dimensions than thin aluminum. 3D printing serves as both a prototyping tool and a manufacturing method, allowing rapid iteration and verification of designs before committing to final materials. The process involves creating radius gauges for measurement, designing new components when original parts don't fit, and using 3D printed jigs to ensure accurate assembly.

Dead zone configuration determines the threshold where flight control systems recognize input. Different controls require different values: thrust reverser needs 0.05, climb/idle needs 0.02, and reverse pitch needs 0.012. These values account for joystick physical movement range. The calibration process involves creating a straight joystick line, setting dead zone values for each control surface, and verifying that the system recognizes all zones correctly without overlapping. Proper calibration ensures accurate translation of joystick movements to flight control inputs.

When setting up flight simulator controllers, it's essential to calibrate dead zones properly. A dead zone is a threshold that prevents constant small signals from being registered as input. If not calibrated correctly, controllers can send continuous signals that make the simulation unusable. To fix this, go to Hardware Settings and increase the dead zone value on each axis to approximately 0.1. This ensures that only intentional inputs register, eliminating unwanted drift or constant signal transmission from your controller.

Controller deadzone is a software feature that prevents unintended input by ignoring small, unintentional movements of controller sticks, ensuring that only deliberate inputs are registered as commands.

A 2D camera with deadzone in Unreal Engine 4 allows the camera to remain fixed within a defined area around the player character, only activating and following the character when they move beyond specific threshold distances on the X (horizontal) and Z (vertical) axes. This is achieved by creating a custom blueprint that calculates the camera's position based on the actor's location plus or minus the deadzone values, and can be configured to lock either axis for fixed-height side-scrollers or vertical scrolling games.

This tutorial demonstrates how to implement a deadzone aiming system in Unreal Engine where the gun rotates with the character when looking left/right within a deadzone, but follows the cursor position when looking up/down outside the deadzone. The implementation involves calculating the desired gun rotation based on cursor position in world space, converting screen coordinates to world space, normalizing the direction vector, and applying the rotation while preserving pitch and roll values. The system uses a sequence node to check if cursor positions are nearly equal (indicating no horizontal movement) before updating the gun's relative rotation, preventing unwanted character rotation during vertical mouse movement.