Patterndo
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Terms of Service

Terms of Service

Please read the terms below before using Patterndo. By using the Service you are deemed to agree to these terms.

Effective 2026-10-12

Article 1 (Purpose)

These terms set out the conditions of use of the Patterndo website and related services such as the editor, guides, and calculators (the "Service") provided by The Patterndo operator (the "Operator"), and the rights, obligations, and responsibilities of the Operator and users.

Article 2 (Content of the Service)

  1. A perfboard part placement and wiring editor with 2D and 3D views, simulation, diagnostics, auto-rewire, schematic image import, and share links
  2. Reading material such as electronics guides, calculators, and a glossary
  3. Any other features the Operator determines and announces

The Operator may improve, change, or suspend part or all of the Service, and announces important changes on the site. The Service is provided free of charge, and ads may be shown on reading pages such as the guides and calculators.

Article 3 (Conditions of use)

  1. Anyone can use the Service without signing up.
  2. Users may use the Service for personal learning, hobby, and non-commercial purposes, and for legitimate work purposes.
  3. Depending on your browser and device (for example, whether WebGL is supported), some features may not work.

Article 4 (Obligations of users)

Users must not do any of the following.

  • Interfere with the normal operation of the Service (excessive automated requests, causing abnormal traffic, exploiting vulnerabilities, and so on)
  • Store illegal information, content that infringes others' rights, malicious code, or personal information using the share link feature
  • Copy, distribute, or commercially use the Service's source code or content without permission
  • Artificially click ads shown in the Service or manipulate impressions
  • Any other act that violates applicable law or these terms

Article 5 (Shared content)

  1. The rights to a board you save with [Share] belong to you. You permit the Operator to store, transmit, and display that data to the extent needed to provide the Service.
  2. Shared data is deleted automatically 180 days after the day it was last saved, and the Operator does not guarantee retention. Keep boards that matter separately as RAW JSON files.
  3. The Operator may delete shared data that violates the law or these terms, or block access to it, without prior notice.
  4. Anyone who knows a share link address can open it, so do not put personal or confidential information in it.

Article 6 (Intellectual property)

The copyright in the Service's software, design, and content such as the guides and calculators belongs to the Operator. Users may read and quote the content for personal learning and non-profit purposes, and must credit the source (the article title and address) when quoting. The circuits users make with the editor and the results are the user's own.

Article 7 (Disclaimer for simulation and content)

  1. The Service's simulation, diagnostics, auto-rewire, and calculator results are reference material for learning and pre-checks based on ideal part models, and do not guarantee the behavior, performance, or safety of real circuits. Results can differ with the tolerances of real parts, temperature, power quality, and soldering condition.
  2. Electrical and soldering work carries risks such as burns, electric shock, fire, and inhaling fumes. The guides are general guidance and do not fit every user's work environment and parts. You work at your own judgment and responsibility, and must check the datasheets and safety rules of the parts you use.
  3. Do not rely on the Service's results alone for high voltages (mains AC, battery packs, and so on), large currents, or designs that can affect life or property (medical, automotive, power supplies, appliances, and so on).
  4. The Operator provides the Service as is, and is not liable for damage caused by using or not being able to use the Service, unless there is intent or gross negligence. Where the law provides that liability cannot be limited, that law applies.
  5. The Service may include links to external sites, and the Operator is not responsible for the content of external sites.

Article 8 (Ads)

To cover the cost of running the Service, the Operator may show ads such as Google AdSense on pages like the guides and calculators. Ads are labeled separately from the content, and their content is the advertiser's responsibility. Handling of personal information related to ads follows the Privacy Policy and Ads & Cookies.

Article 9 (Suspension of the Service)

The Operator may suspend the Service temporarily or permanently in unavoidable cases such as system maintenance, failures, circumstances of external services (hosting, ads, and so on), or natural disasters, and gives advance notice where possible.

Article 10 (Changes to the terms)

The Operator may change these terms when necessary, and announces the changed terms on this page together with the effective date. If you keep using the Service after the effective date, you are deemed to agree to the changed terms.

Article 11 (Governing law and jurisdiction)

These terms are interpreted under the laws of the Republic of Korea, and any dispute related to the Service is resolved in the court with jurisdiction under the Civil Procedure Act.

Article 12 (Contact)

Please use the contact page for questions about these terms and the Service. These terms take effect on 2026-10-12.