Today, I’m sharing this six-axis robotic arm that I built for under 200 yuan. It can be controlled via both smartphone and computer. The arm is servo-driven, and after several revisions to the body model, it’s now functioning well with no major issues. The final parts were produced using 3D printing. I’ll organize and share all the software, design files, and other resources related to this project, so please give it a like and show your support. For the control board, I designed a custom PCB on JLCPCB. To keep it as compact as possible, I used an ESP32-C3 Mini as the main controller, which supports Wi-Fi and Bluetooth connectivity. For the servo driver, I used the PCA9685 chip I’ve introduced before. After receiving the board, you only need to solder a few capacitors. Once the core module is plugged in, it’s ready to use. A quick power-on test worked perfectly—I have to say, JLCPCB is impressive. Now, let’s move on to the fun part: assembly. To simplify debugging and installation, I developed a mini program that lets you control each servo’s angle by connecting to the ESP32 via Bluetooth, ensuring the servos’ range of motion meets expectations. Here’s the final assembled result. I really like the overall style. Let’s see how it performs when powered on. Each joint of the robotic arm moves quite smoothly. The end effector features a quick-release design, allowing you to swap out different grippers depending on the application. With the Lunar New Year approaching, I’d like to wish everyone an early happy new year, and hope all your wishes come true in the coming year. There’s still considerable room for improvement in the software control side, and I plan to add more features in the future, such as motion memory and playback. If you’re interested in this robotic arm or have any suggestions, feel free to leave a comment. See you in the next video!