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 iterations of the body model, it’s now functioning well with no major issues—just 3D print the parts and you’re good to go. I’ll organize and share all the software, design files, and other resources involved in 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. I did a quick power-on test, and I have to say, JLCPCB really did an excellent job. Now, let’s move on to the fun part: assembly. To make installation and debugging easier, I developed a mini-program that lets you control each servo’s angle by simply connecting to the ESP32 via Bluetooth, ensuring the servos’ range of motion meets expectations. Here’s how it looks once fully assembled—I’m quite happy with the overall style. Let’s see it in action after powering it 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 may all your wishes come true in the coming year. There’s still considerable room for optimization in the software control side of this robotic arm, and I plan to develop more features in the future, such as motion memory and playback. If you’re interested in this robotic arm or have any suggestions for improvement, feel free to leave a comment. See you in the next video!