Guide to troubleshooting common failures in off-grid solar lighting systems

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Off-grid solar lighting systems can fail due to complex interactions between generation, storage, control, and load. A systematic troubleshooting approach should first verify the LED light itself for damage or connection issues. The next step involves checking the battery for reduced capacity, aging, or inadequate charging. Finally, the solar panel input should be inspected for shading, dirt, damage, or poor wiring connections.

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Software Development Article Advises Caution When Refactoring Shift Overlap Code

A DEV Community article details a specific method for refactoring code that calculates shift overlaps and breaks. The author warns that small edits can unintentionally change the program's behavior, making it appear as a code cleanup when it is not. The core advice is to first establish a verified baseline of current behavior before extracting helper functions. The article provides concrete coding examples and instructions for placement within a disposable repository. The goal is to create a smaller function while preserving all existing logic around edge cases like midnight wraps and break credits.

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ProgrammingDEV Community ·

FastAPI JWT Authentication Guide Demonstrates Five-Endpoint API

A developer published a complete guide for implementing JWT authentication in FastAPI. The tutorial provides a single-file, 118-line solution with five API endpoints for login, user data, and protected routes. It utilizes modern libraries including PyJWT for token handling and Argon2 for password hashing. The guide emphasizes practical security by demonstrating common failure cases like expired or invalid tokens. It is tested with Python 3.12 and FastAPI 0.128.

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ProgrammingDEV Community ·

AWS Secrets Manager helps production applications securely manage credentials

Hardcoding credentials like database passwords in source code creates security risks, especially when code is shared or deployed. Services like AWS Secrets Manager provide secure storage for sensitive data such as API keys and database connection strings. This approach separates configuration from application code, preventing exposure in repositories or Docker images. Applications retrieve credentials at runtime with appropriate IAM permissions, enabling secure access without embedding secrets. Centralized secret management also simplifies credential updates through rotation workflows.

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ProgrammingDEV Community ·

Developer creates screen time app that forces outdoor photo break to unlock sites

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