当环境光线变亮时，又自动关闭灯带。 连接 Arduino ↔ LDR 分压 ↔ 继电器模块 ↔ 12V 灯带。 热熔胶枪（可选） 用于固定 LDR 位置或整理线材，提升结构可靠性。 A0 点的电压随光照变化而变化，Arduino 通过 analogRead(A0) 读到 0–1023 之间的数值，即可反映当前亮度。 为了安全与隔离，LED 灯带不直接由 Arduino 供电，而是： 灯带的 正极( ...

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Homecoming has ended after a tour of three regions to honour and equip schools whose teams excelled in this year’s ...

The 2025 Ghana Science & Tech Explorer Challenge Prize (GSTEP) has presented each winning school with a comprehensive suite ...

ST. PETERSBURG, Fla. — It’s official: The Tampa Bay Rays belong to a new ownership group. The team confirmed the news Tuesday afternoon. An ownership group led by Florida-based business executive ...