Sketch Drawing Toy

<h2>Project Overview</h2> <p>An Etch A Sketch-style drawing toy using a Feather M4 Express, a 2.4" TFT FeatherWing, and potentiometers for control.</p> <h2>Bill of Materials (BOM)</h2> <ul> <li>Feather M4 Express board</li> <li>2.4" TFT FeatherWing display</li> <li>two potentiometers</li> <li>and buttons.</li> </ul> <h2>Circuit Diagram & Component Arrangement</h2> <p>Follow the wiring diagram below. Each component connects to specific pins on the microcontroller. Use a breadboard for prototyping and ensure all connections are secure before powering on.</p> <p><strong>Wiring Summary:</strong> The TFT FeatherWing connects directly to the Feather board. Potentiometer 1 is wired to pin A0, GND, and 3V. Potentiometer 2 is wired to pin A1, GND, and 3V. Buttons are connected to other digital input pins.</p> <h2>Step-by-Step Procedure</h2> <ol> <li><strong>Step 1 - Prepare Components:</strong> Gather all components from the BOM. Inspect for damage and verify ratings.</li> <li><strong>Step 2 - Breadboard Layout:</strong> Place the microcontroller on the breadboard. Arrange components for clear wiring paths.</li> <li><strong>Step 3 - Power Connections:</strong> Connect VCC and GND first. Ensure proper polarity for polarized components.</li> <li><strong>Step 4 - Signal Wiring:</strong> Connect sensors and actuators per the wiring table. Double-check pin assignments.</li> <li><strong>Step 5 - Upload Code:</strong> Connect USB, load the sketch, and upload. Verify serial output if applicable.</li> <li><strong>Step 6 - Test & Calibrate:</strong> Power on and test each function. Calibrate sensors if needed.</li> <li><strong>Step 7 - Enclosure (Optional):</strong> Mount in a 3D-printed or custom enclosure for durability.</li> </ol> <h2>Safety Notes</h2> <ul> <li>Always disconnect power before making wiring changes.</li> <li>Use appropriate eye protection when soldering.</li> <li>Adult supervision is required for makers under 16.</li> <li>Do not exceed voltage ratings of components.</li> </ul>