Simple Proximity Sensor Using BC547 Transistor | DIY Electronics Project
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YouTubePrabha's Creative Experiments
Simple Proximity Sensor Using BC547 Transistor | DIY Electronics Project
This simple proximity sensor circuit uses: One 220Ω resistor in series with the IR LED (to limit its current). The second 220Ω resistor connects between the photodiode and the base of the BC547 transistor (acting as a current limiter and pull-down resistor to ensure proper biasing of the transistor). When an object reflects IR light back to ...
2.8K views2 months ago
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