Okay, so this is the manyeth video I am watching on photodiodes and transistors, but this is the first, that mentions that the main difference is that the photodiode does not have a transistor built into it. Awesome vid!
Hi Gaven, thanks for the great video, was really helpful ! I was just wondering about calibration circuits for phototransistors to account for degradation of the LED or phototransistor ? Is that necessary , do they degrade quickly ? Thanks
Back in the business? Anyway, thanks a lot for your videos, I began the Raspberry Pi with your channel, and it was a great help as I started from scratch .
Hey Gaven! This is the first time I post something on your channel and I want to thank you for your videos, they have been really useful in helping me integrate my RPi with electronic components. However, I have been struggling a lot with the phototransistor videos. For example, I can't even replicate your setup on the breadboard and obtain the same results as yours. (or close enough). Would it be possible to share a schematic of your setup?. In my case I am using: an infrared LED (IR383) connected with a 330 Ohm resistor a phototransistor (PT1302B/C2) connected to a 10K Ohm resistor as indicated in the video 6V DC voltage Basically when I power the circuit the most voltage I get is around 0.30V instead of the 5V (or 6V in my case)
5y ago I started the project and forgot to finish it, now when reviewing what's in the box now I understand why the F had pair of non-working LEDs - they are IR ! :D
Can I use the phototransistor to measure the color of a light? It seems to me if I use 3 phototransistors. One with a red, another with a blue, and the 3rd with a green filter. Am I on the right track? The more sensitive the better I think.
It appears that using these methods, a photoresistor can be used to replace a LDR, if placing the 10k resistor after the phototransistor, and doing some experimentation. Is that a fair assumption? I am looking to modify a circuit using CdS based LDR's, which are becoming more difficult to come, with a better solution. However, I have not been able to find 3mm to 5mm, two leg phototransistors in a range of normal white light. Can I assume a clear phototransistor with a 850nm to 940nm high range would work? Thanks
I have a transistor with a clear case and a base connection, three pins. It responds to light. With a little light it looks like a transistor in a component tester. When it has a lot of light it becomes to back to back diodes with apparently no conduction. Interesting component. Can't find a list or number for it, to92 case. Very old.
Is there a single photo transistor that can detect one of the 7 light frequencies? To be clear I’d like the transistor to be capable of detecting all 7 colours but only detects the one relevant colour that’s shining onto the transistor, I hope that made sense lol
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This video has been very important for my graduation thesis, thank you
This video was like a miracle, I was desperately searching for a good explanation and you did a fantastic job! Thank you!
pretty freaking clear and well organized.
Okay, so this is the manyeth video I am watching on photodiodes and transistors, but this is the first, that mentions that the main difference is that the photodiode does not have a transistor built into it. Awesome vid!
Awesome thanks! It was driving me crazy, you made me realize i was missing a transistor.
what is serial number of this photo transistor
Nice to see the explanation of pull up resistor versus pull down resistor.
Very well put together and informative video!!
Excellent Explanation and Demo's just what Hobbyists need.
Very clear and instructive video on phototransistor basics. Thank you !
Just what I was looking for. Thanks. And very well explained.
...subbed.
Very good, thank you, just the info I needed, big thumbs up!
Clear demonstration. Thanks!
Amazing video, keep going, thank's a lot !
Great video!! Really good explanation! I should have watched it sooner.
Thanks a million this video was really helpful!!!
Hi Gaven, thanks for the great video, was really helpful !
I was just wondering about calibration circuits for phototransistors to account for degradation of the LED or phototransistor ? Is that necessary , do they degrade quickly ?
Thanks
Excellent work really help me out.
Amazing this comparison!
Great video!
Great Tut! Thank you. Please add a schematic, at the end, of the breadboard layout, for clarity.
10/10...summarized, interesting, informative and well rounded. It serves as a splendid introductory video.
Fantastic video thank you !
What type of Phototransistor would you use to create a break beam for small objects like a fruit fly which is only 2 mm?
Thank you! That was really helpful...
Nicely explained 🙂
Back in the business? Anyway, thanks a lot for your videos, I began the Raspberry Pi with your channel, and it was a great help as I started from scratch .
Anthony Micault Great to hear that you've found some of the videos useful! I plan to release videos more regularly for the foreseeable future.
Hey Gaven! This is the first time I post something on your channel and I want to thank you for your videos, they have been really useful in helping me integrate my RPi with electronic components. However, I have been struggling a lot with the phototransistor videos. For example, I can't even replicate your setup on the breadboard and obtain the same results as yours. (or close enough). Would it be possible to share a schematic of your setup?.
In my case I am using:
an infrared LED (IR383) connected with a 330 Ohm resistor
a phototransistor (PT1302B/C2) connected to a 10K Ohm resistor as indicated in the video
6V DC voltage
Basically when I power the circuit the most voltage I get is around 0.30V instead of the 5V (or 6V in my case)
great video mate. great explaining. helped me find out what is called 1 piece i want to replace in a device and can't find its name
Great. Thank you.
Would it be possible to create a IR homing seeker by placing them in a 80x80 array?
I'm asking for a friend...
For resistance which values did you use
5y ago I started the project and forgot to finish it, now when reviewing what's in the box now I understand why the F had pair of non-working LEDs - they are IR ! :D
Can I use the phototransistor to measure the color of a light? It seems to me if I use 3 phototransistors. One with a red, another with a blue, and the 3rd with a green filter. Am I on the right track? The more sensitive the better I think.
It appears that using these methods, a photoresistor can be used to replace a LDR, if placing the 10k resistor after the phototransistor, and doing some experimentation.
Is that a fair assumption? I am looking to modify a circuit using CdS based LDR's, which are becoming more difficult to come, with a better solution.
However, I have not been able to find 3mm to 5mm, two leg phototransistors in a range of normal white light. Can I assume a clear phototransistor with a 850nm to 940nm high range would work?
Thanks
thanks man!!
the IR DIODE and PHOTO TRANSISTOR you used, is of what make ..?? specs???
Nice
Good keep going
I have a transistor with a clear case and a base connection, three pins. It responds to light. With a little light it looks like a transistor in a component tester. When it has a lot of light it becomes to back to back diodes with apparently no conduction. Interesting component. Can't find a list or number for it, to92 case. Very old.
Is it operate in sunlight.... without any malfunctioning.....?
Hello. It's possible use a phototransistor that works with normal light instead infrared light?
Is there a single photo transistor that can detect one of the 7 light frequencies? To be clear I’d like the transistor to be capable of detecting all 7 colours but only detects the one relevant colour that’s shining onto the transistor, I hope that made sense lol
How to make sine wave inverter at home?
thank you
very very good
my phototransistor does exactly the opposite of what yours does in the video I'm confused
Do all LED's emit continuum light ( _______ ) or there is some of them emit light like signal ( _ _ _ _ _ _ _ )
LED do not work in reverse bias
Who knows the max distance to use that?
Iß it complete information about phototransistor
Okk not bad 😊
Like
中国移动 ?
Hello raspberry PI guy☠☠☠
中国移动？You were in China ?
I already made this photoxsistor ckt and its controlling an alarm, a light and even some appliances 😁😁😁 its very easy to assemble