LDRs or Light Dependent Resistors are very useful especially in light/dark sensor circuits. Normally the resistance of an LDR is very high, sometimes as high as 1000 000 ohms, but when they are illuminated with light resistance drops dramatically.
IR Receiver - GP1UX511QS
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IR remote control receiver, GP1U series
Infrared detector, preamplifier and demodulator in one unit. Designed to receive signals from infrared remote control units.
External metallic RFI shielding
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