IR Based Hand Detection LED Bar Graph Circuit | LM3914 Touchless Sensor
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YouTubeMAKING PCB 3D
IR Based Hand Detection LED Bar Graph Circuit | LM3914 Touchless Sensor
This video shows an IR Based Hand Detection LED Bar Graph Circuit. This circuit detects a hand or any object without physical contact. An IR LED emits infrared light, and when a hand or object comes close, the light is reflected and received by the photodiode. The received signal is amplified by a transistor, and then the LM3914 IC turns the ...
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