Hi,
I'm working on a phototransistor control for a project and haven't worked much with electronics in a few years (my recollection is a little shaky, consider me a newbie)
I attached the datasheet for the photransistor I would like to use. It's a combo IR LED/Phototransistor. I'm trying to set it up so that when something passes in front of the sensor, the reflection triggers the transistor.
I'm using an 18V power source and need to switch up to 2A on and off. I can step the voltage down for the LED but I am a little lost on the transistor side (trying to wade through the spec sheet).
Can I feed 18V directly to this transistor? If not can I step it down with a resistor also?
What would be the best way to connect the emitter to another transistor (capable of switching the 2A at 18V)? Any suggestions on a good transistor to use for this? Digikey, Radio Shack, etc.
Lastly, I've heard that phototransistors can have some issues with ambient light causing false signals. I've seen some circuit diagrams that use a resistor to avoid this. However, I'm unsure how to size and place it.
I apologize for the beginner questions and any help/pointers would be greatly appreciated.
Thanks,
-Jacob
I'm working on a phototransistor control for a project and haven't worked much with electronics in a few years (my recollection is a little shaky, consider me a newbie)
I attached the datasheet for the photransistor I would like to use. It's a combo IR LED/Phototransistor. I'm trying to set it up so that when something passes in front of the sensor, the reflection triggers the transistor.
I'm using an 18V power source and need to switch up to 2A on and off. I can step the voltage down for the LED but I am a little lost on the transistor side (trying to wade through the spec sheet).
Can I feed 18V directly to this transistor? If not can I step it down with a resistor also?
What would be the best way to connect the emitter to another transistor (capable of switching the 2A at 18V)? Any suggestions on a good transistor to use for this? Digikey, Radio Shack, etc.
Lastly, I've heard that phototransistors can have some issues with ambient light causing false signals. I've seen some circuit diagrams that use a resistor to avoid this. However, I'm unsure how to size and place it.
I apologize for the beginner questions and any help/pointers would be greatly appreciated.
Thanks,
-Jacob
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