Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
The new LED streetlights in my city are activated and have their brightness adjusted with an RF modem on each one.
The old streetlights were activated by a photocell which kept a light turned on all day by a bird dropping.
There is a shopping mall near my home that 6 weeks ago had its parking lot in the dark for a couple of hours after sunset because the lights are controlled by a stupid clock that knows nothing about the seasons affect on sunset times. Now the parking lot lights are turned on when it is still sunny.
Add "photo-diode" to your list. A glass diode like a 1N4148 is also affected by light. An LED is also affected by light.
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