Hey All,

Was wondering if an Infrared Phototansistor can be used as a light sensor in place of an LDR? If so, can you direct me to a circuit diagram to follow?

Thanks
TRU

 

Hey All,

Was wondering if an Infrared Phototansistor can be used as a light sensor in place of an LDR? If so, can you direct me to a circuit diagram to flow?

Thanks
TRU

https://www.allaboutcircuits.com/projects/how-to-sense-color-with-an-arduino/ might help.

 

https://www.allaboutcircuits.com/projects/how-to-sense-color-with-an-arduino/ might help.

Thanks for the quick reply. Forgot to mention...

Would like to do this without a Microcontroller such as Arduino.

Thanks,
TRU

 

Your andwer is in the link that Raymond Genovese provided in post #2.

On that page scroll down to the diagram showing a photo transistor connected to a resistor. When light falls on the transistor, the voltage on the emitter increases. No other parts are needed -the operation is very similar to that of an LDR.