L14G2/G3 is an NPN phototransistor. It acts as a photodetector in the sense that it can convert the incident light into electric response. They are commonly used. L14G2 is an NPN photo-transistor. It acts as a photo-detector in the sense that it can convert the incident light into electric response. They are commonly used as . Buy L14F1 with extended same day shipping times. View datasheets, stock and pricing, or find other Phototransistor.

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Jan 13, 6. Hello univeruser Since you have said photltransistor you don’t want to make any more sensitive arrangements, here is a simple diagram adapted from what you originally uploaded, showing the photodarlington transistor driving a LED – in this case, the ohm resistor is needed. Jan 13, 8. AdjusterJan 15, By the way, could you tell why the resistor is used in the circuit? Secondly, I don’t want to make more sensitive arrangements, for I can easily afford to point the laser pointer on the phototransistor, even if impractical.

I believe soldering shouldn’t be much of a safety phototransixtor as I have used them before and have gone for a robotics class wherein we l14f11 to solder the parts provided onto the provided PCBs in a way, they didn’t explain how they work, but just doing the soldering. Jan 12, 1. Join Physics Forums Today! My father told the transistor may fry up at excess voltage, but is it right? Your name or email address: Jan 13, 7. If not, I don’t mind, a little bit of trial-and error can be done.


So again, I hope the phototarnsistor will be posted without further questioning. Jan 13, 9.

I would guess that by 3-pin you mean a device which has the base connection brought to an outside pin, since LIF41 is a photo-darlington which has the input base brought out?

AdjusterJan 12, I believe it is the pin that juts out a little bit, which should be the base pin I have marked my guess in the photo attached. No, create an account now. This would help against leakage effects and improve turn-off speed, at the expense of lowered sensitivity. Do you already have an account?

Log in or Sign up. Everyone who loves science is here! But then, which one? Last edited by a moderator: Jan 12, 4.

Using a L14F1 IR phototransistor in a switch

This was exactly why I asked a circuit diagram. Jan 12, phogotransistor. In another posting I also sent you a link to a data sheet for the L14F1. The friendliest, high quality science and math community on the planet! I just suggested a remote control car with it, but I could rather make a simple wireless circuit switching a bulb off and on.

Jan 15, Jan 14, My first guess would be that the base could be left open, but depending on the application it may be better to connect a resistor from the base to the emitter.


Could you please post a diagram and fuller details of your application? Using a L14F1 IR phototransistor in a switch.

You will see that the transistor base lead is not connected, as was suggested in one of my earlier posts. Lastly, I don’t allow my lack of skils to come in between me making my circuit. Yes, phototransisor password is: Jan 12, 5.

Using a L14F1 IR phototransistor in a switch | Physics Forums

Jan 12, 2. Let us trash the safety issues as of now.

As a final help, in the picture of the phototransistor product I have attached, please look at it and re-post it to me if you can identify the base pin. And never mind the time, my parents decided to buy the phototransistor later.

Phogotransistor the earlier one I posted, why couldn’t I just leave one pin left out hanging?

I suggest that you photofransistor at that because amongst other things it will show you how to connect the device up correctly. AdjusterJan 13,