Pedro is a fully open-source, 3D-printable educational robot arm designed for STEM classrooms and makers who want to learn robotics from scratch. With only four printable parts, four mini servo motors, and tool-free snap-together assembly, Pedro can be built and operational in under 10 minutes.**Design Philosophy** Source: https://github.com/mattions/pedro Pedro is intentionally minimal. The entire structure consists of four 3D-printed components — BASE, ARM, GEAR, and SERVO bracket — that snap and gear together without screws or adhesive. This makes it ideal for workshops where dozens of students can assemble their own robot simultaneously. All parts print in under 2 hours on any FDM printer at 0.2mm layer height in PLA or ABS. **Electronics** Pedro is powered by a custom Arduino-compatible controller board called the Pedro Board, which integrates four servo outputs, an nRF24L01 radio module for wireless control, an HC-05 Bluetooth module for smartphone connectivity, and an ESP8266 for WiFi and IoT integration. Power comes from a 7.4V LiPo battery rechargeable via USB. **Control Modes** Pedro supports five control modes: Manual (serial/USB from a PC), Radio (nRF24L01 remote), Bluetooth (smartphone app), Replay (execute recorded sequences), and Record (capture and store movement sequences). The firmware is built on the Arduino platform and is fully open source under Apache 2.0 in the PedroRobot repository. **Community** Pedro is used in over 70 schools and educational workshops across France and internationally. The project ecosystem includes Pedro Board (PCB gerbers + schematics), PedroRobot (Arduino firmware), and PedroSTEM (complete lesson plans and activities). All repositories are published under Apache 2.0 by Almoutazar Saandi.
Category: Arm Robots
| Qty | Part | Notes | |-----|------|-------| | 6 | Servo motor (MG996R or similar) | Main joints | | 1 | Servo controller board (PCA9685) | PWM control | | 1 | Raspberry Pi (any model) | Main controller | | 1 | 5V 3A power supply | Servo power | | 1 | 3D printed frame set | See STL files | | 1 | Set of M3 screws and nuts | Assembly hardware |