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IR photo transistor replacement, help needed

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J

Javid.zare.s

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hi, I wanna replace the photo transistor of the below circuit with the common ir receiver (shown in figure 2)
so whats the new configuration ? :confused:
**broken link removed**
tmp-cam--1628690064.jpg
 

Hi,

One of the photos hasn't loaded correctly.
 

    V

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If figure 2 is the one in post #1, you can't do it.

The schematic shows a phototransistor that conducts when IR light falls on it so its collector voltage drops.
The black device is a photodiode, it is normally used to produce a tiny voltage when light falls on it or in a mode where it passes a tiny current.

You would need extra circuitry and a degree of experimentation to swap to the other device.

Brian.
 

    V

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