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How to make visible light sensor module from existing LDR module (I have one of it). Both of it have same circuit but different sensors. So,I would like to buy phototransistor separately as LDR is slow to respond to 5mm while LED which flickers at >56000 baud rate.

Circuit Diagram

Can I replace sensor in circuit diagram with TEPT5600 phototransistor official page.

  • I'm voting to close this question as off-topic because it is not about programming. You might have better luck at: https://electronics.stackexchange.com/ – Nisse Engström Dec 29 '19 at 07:22

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Yes, you can replace the LDR sensor with a phototransistor like TEPT5600/TEPT4400 which works at ~20ns(which is suitable for >9600 BR). The Collector needs to go to pin 2 (+) and the Emitter to pin 1 (-).

Sathvik
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