{"id":23919484,"url":"https://github.com/dotpipe/prosthesis","last_synced_at":"2026-03-01T17:35:00.415Z","repository":{"id":270936213,"uuid":"911902387","full_name":"dotpipe/Prosthesis","owner":"dotpipe","description":"A Prosthetic Hand for Your Friend or Family.","archived":false,"fork":false,"pushed_at":"2025-01-04T06:23:48.000Z","size":4,"stargazers_count":0,"open_issues_count":0,"forks_count":0,"subscribers_count":1,"default_branch":"main","last_synced_at":"2025-12-11T11:43:27.686Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":null,"language":null,"has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/dotpipe.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2025-01-04T06:23:29.000Z","updated_at":"2025-09-17T17:33:48.000Z","dependencies_parsed_at":"2025-01-04T07:29:58.973Z","dependency_job_id":"522b1851-336c-4320-8a3c-ebc133d647de","html_url":"https://github.com/dotpipe/Prosthesis","commit_stats":null,"previous_names":["dotpipe/prosthesis","davidpulse1/prosthesis"],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/dotpipe/Prosthesis","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/dotpipe%2FProsthesis","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/dotpipe%2FProsthesis/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/dotpipe%2FProsthesis/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/dotpipe%2FProsthesis/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/dotpipe","download_url":"https://codeload.github.com/dotpipe/Prosthesis/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/dotpipe%2FProsthesis/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":29976279,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-03-01T16:35:47.903Z","status":"ssl_error","status_checked_at":"2026-03-01T16:35:44.899Z","response_time":124,"last_error":"SSL_connect returned=1 errno=0 peeraddr=140.82.121.5:443 state=error: unexpected eof while reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2025-01-05T14:52:37.782Z","updated_at":"2026-03-01T17:35:00.384Z","avatar_url":"https://github.com/dotpipe.png","language":null,"readme":"# Prosthesis\nA Prosthetic Hand for Your Friend or Family.\n\n### **Step-by-Step Manufacturing Process for the Prosthetic Arm**\n\nThis guide outlines the entire process, from conceptualization to final assembly, ensuring functionality, durability, and user comfort.\n\n---\n\n### **1. Design Phase**\n\n#### **Step 1: Anatomical Measurements**\n- Use **3D scanning** or manual measurement to capture the user’s forearm dimensions, wrist shape, and residual limb structure.\n- Identify the precise locations of **flexor and extensor muscles** (e.g., flexor digitorum and extensor digitorum) for placing EMG sensors.\n\n#### **Step 2: Digital Modeling**\n- Create a **3D CAD model** of the prosthesis using software like SolidWorks or Fusion 360:\n  - **Over Section:** Encases the top of the forearm and houses the motors, actuators, and battery.\n  - **Under Section:** Wraps under the forearm and secures the EMG sensors for muscle signal detection.\n  - Include hollow channels for synthetic tendons, wiring, and actuation mechanisms.\n  - Design modular, articulated fingers with joints to mimic natural hand movement.\n\n#### **Step 3: Material Selection**\n- Choose lightweight, durable materials:\n  - **Prosthetic Shell:** Nylon (PA12) or carbon fiber-reinforced polymer.\n  - **Finger Components:** TPU (flexible thermoplastic polyurethane) or reinforced ABS.\n  - **Synthetic Tendons:** High-tensile-strength polymer or Kevlar-coated fiber.\n  - **Electronics Housing:** Waterproof, shock-resistant polymer.\n\n---\n\n### **2. Prototyping Phase**\n\n#### **Step 4: 3D Printing**\n- Use **SLS (Selective Laser Sintering)** or **FDM (Fused Deposition Modeling)** for component fabrication:\n  - Print the prosthetic shell, finger modules, and internal channels separately for modular assembly.\n  - Ensure fine tolerances for moving parts like joints and tendon channels.\n\n#### **Step 5: EMG Circuit Prototyping**\n- Assemble an **EMG sensor system**:\n  - Use medical-grade EMG pads to detect muscle activity.\n  - Connect sensors to a **microcontroller** (e.g., Arduino Nano, ESP32) for signal processing.\n- Develop and test firmware to translate muscle signals into motor commands.\n\n#### **Step 6: Actuator and Motor Testing**\n- Test **servo motors** or **micro linear actuators** to ensure they generate sufficient torque for finger movement:\n  - Configure for pulling synthetic tendons to mimic flexion and extension.\n  - Ensure smooth, proportional response to EMG signals.\n\n---\n\n### **3. Assembly Phase**\n\n#### **Step 7: Mounting EMG Sensors**\n- Install **EMG sensors** along the identified muscle activation points:\n  - Use adjustable pads for secure placement and optimal signal detection.\n  - Route sensor wiring through internal prosthetic channels to avoid tangling or damage.\n\n#### **Step 8: Installing Motors and Tendons**\n- **Motor Mounting:**\n  - Secure motors in the **over section** of the prosthesis with vibration-dampening brackets.\n- **Tendon Routing:**\n  - Thread synthetic tendons through channels in the prosthetic fingers.\n  - Attach tendons to motor spools for controlled flexion and extension.\n  - Include tension-adjustment mechanisms for fine-tuning.\n\n#### **Step 9: Battery and USB-C Integration**\n- **Battery Installation:**\n  - Mount a rechargeable **lithium-ion battery** (2000–3000 mAh) in a protected compartment.\n  - Ensure thermal regulation and shock resistance.\n- **USB-C Port Setup:**\n  - Incorporate a **retractable USB-C charging cable**:\n    - Use a spring-loaded mechanism for smooth extension and retraction.\n    - Protect the cable with durable, flexible materials like reinforced silicone or TPU.\n    - Integrate a **tuck-away compartment** to store the USB-C extension securely when not in use.\n\n---\n\n### **4. Final Assembly**\n\n#### **Step 10: Finger Mechanism Assembly**\n- Assemble finger segments using **pivot joints**:\n  - Use **metal pins** or durable nylon hinges for joint articulation.\n  - Install elastic bands or springs at each joint to assist in finger extension.\n\n#### **Step 11: Wiring and Electronics Integration**\n- Connect all components:\n  - Route wiring for the EMG sensors, motors, and battery through internal channels.\n  - Ensure secure connections and waterproofing for electrical components.\n\n#### **Step 12: Haptic Feedback (Optional)**\n- Install **small vibration motors** to provide tactile feedback for actions like gripping or releasing objects.\n\n#### **Step 13: External Finish**\n- Sand and polish 3D-printed surfaces for a smooth, professional appearance.\n- Apply a **protective coating** to ensure durability and resistance to wear.\n\n---\n\n### **5. Testing and Calibration Phase**\n\n#### **Step 14: Functional Testing**\n- Test the prosthesis under real-world conditions:\n  - Verify smooth, proportional finger movement in response to muscle signals.\n  - Evaluate grip strength and responsiveness for various objects.\n\n#### **Step 15: User Adjustment and Training**\n- Fit the prosthesis to the user and adjust the tension of synthetic tendons.\n- Train the user on using EMG signals to control the prosthetic hand effectively.\n\n#### **Step 16: Final Quality Checks**\n- Perform durability tests for all mechanical and electrical components.\n- Ensure the battery system meets safety and longevity standards.\n\n---\n\nThis detailed process ensures a **functional, durable, and user-friendly prosthetic arm** that leverages modern materials and technologies while maintaining modularity for future upgrades or repairs.\n","funding_links":[],"categories":[],"sub_categories":[],"project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdotpipe%2Fprosthesis","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fdotpipe%2Fprosthesis","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdotpipe%2Fprosthesis/lists"}