Autonomous Open-Science Robot

Figure 1: Complete setup of the robot

Figure 2: Schematic diagram of the robot's key components

Project Overview

Automated electrochemical testing system that combines a modified 3D printer with electrochemical measurement capabilities. The purpose of this robot is to enable high-throughput electrochemical research under $400.

The system features:

• Modified 3D printer frame for automated positioning
• 3D printed bath design and electrode holders
• Servo-controlled grippers for electrode manipulation
• Programmable fluid handling system with peristaltic pumps
• Integrated potentiostat for electrochemical measurements

Getting Started

Important: If you are using Ender 3 Pro gantry, power on the 3D printer gantry first, then connect the USB cable. Othwerwise the homing is not guaranteed to succeed.

1. Set up the hardware components according to the Mechanical and Electronics documentation
2. Install the required software dependencies
3. Configure the device connections in devices.json
4. Run the system using the main.py Python script

Documentation

• Software Documentation
• Electronics Documentation
• Mechanical Documentation

Data

Examples of data collected by the system:

Bayesian Optimization

Figure 7: Bayesian optimization progress showing error convergence for target potential of -0.1V

The optimization process iteratively adjusts vinegar concentration while measuring the resulting potential difference, converging on the optimal conditions with minimal experimental trials.

Acetic Acid Solutions

Figure 5: LPR measurement in full 5% Acetic Acid (Rp = 276 Ω)

Figure 6: LPR measurement in dilute 1% Acetic Acid (Rp = 4,978 Ω)

NaCl Solutions

Figure 3: LPR measurement in 3% NaCl solution (Rp = 206 Ω)

Figure 4: LPR measurement in 1% NaCl solution (Rp = 329 Ω)