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Raspberry Pi nightlight
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You’ve probably all seen those cheap, solar-powered lamps that you can stick into your garden to try and give it a classy bit of illumination during the night. If you’ve actually got one then you may have found out that they don’t shine very brightly and the plastic stakes can be very flimsy. So why not make your own version? What we’ll show you on this page is the beginning of an array of light-sensitive LEDs using a single LED, so that you can understand how the system works. We’ll use a special resistor called a light dependant resistor (LDR) or photoresistor that changes its resistance based on the levels of light it’s receiving.
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