This automatic park light switch with LDR automatically turn ON the light when the surrounding light dims to a preset level. The first circuit diagram is an NPN design intended for negative grounded ...

Add Automatic LED Lights for Desk Drawers. ... See the source page below for full instructions including a wiring diagram and step-by-step photos. ... consider adding strips of LED lighting ...

The Aquarium Led Lighting circuit automatically turns on at sunset and gives changing White, Blue and Green color display to make the aquarium attractive. In the morning the aquarium led light turns ...