@mehmet.bkr5: IR Proximity Sensor with BD139 | 6 LED Detection Circuit This compact electronics project uses an IR LED, photodiode, BD139 transistor, and 1N4007 diodes to detect nearby objects. When reflected infrared light is received, the six green LEDs light up in sequence. A great DIY project for learning sensor circuits and transistor-based electronics. Visuals were partially created with AI assistance. Like the video, share your thoughts in the comments, and follow for more interesting electronics projects! Warning: This circuit should only be built by people with sufficient electronics knowledge or under the supervision of an experienced expert. Incorrect connections may cause damage or personal injury. #TikTokElectronics #ProximitySensor #IRSensor #BD139 #Photodiode

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Saturday 17 October 2026 19:28:42 GMT