semiconductor
New Member
I'm working on my own project: automatic tap. When we put your hands in the sink, the tap automatically turns on and the water flows. One of my goals is that, sensor is as cheap as possible. So I decided to use IR sensor (the cheapest way!!!).
- The IR sensor comprises 2 modules: The transmitter and The receiver. When I designed the transmitter, I wanted to send our modulated signal to make the information signal immune from noise. The carrier signal frequency is 40 kHz and the significant signal frequency is 40 Hz. To modulate the signal, I used 2 IC NE555s, the first one produces a signal at frequency of 40 Hz and the second one produces a signal at frequency of 40 kHz (pin 3 of one is connected to pin 4 of the other).
But I'm in trouble. At the receiver, I want to use IC (3 pins) SFH-506. But I do not know how it work (When it receives the signal from the transmitter, What is the shape of signal at the output of SFH506? a pulse or a line? etc.).
One of my friends recommend me to use LM567, a tone decoder, The output of SFH is connected to the pin 3 of LM567. Exactly, I don't know why to connect like that. And also, I do not know how it work too (plz, do not laugh, I'm just a novice).
By the way, I've heard about solenoid valve. I have to use it to open the tape electrically to make the water flow. I have'nt seen it. Can some one give me some links to it. And explain to me how it work!
Can some one help me explain how SFH506 and LM567 work?
Can you introduce me some circuits that related to or useful to me and my project.
Thank you in advance!
Peter!
- The IR sensor comprises 2 modules: The transmitter and The receiver. When I designed the transmitter, I wanted to send our modulated signal to make the information signal immune from noise. The carrier signal frequency is 40 kHz and the significant signal frequency is 40 Hz. To modulate the signal, I used 2 IC NE555s, the first one produces a signal at frequency of 40 Hz and the second one produces a signal at frequency of 40 kHz (pin 3 of one is connected to pin 4 of the other).
But I'm in trouble. At the receiver, I want to use IC (3 pins) SFH-506. But I do not know how it work (When it receives the signal from the transmitter, What is the shape of signal at the output of SFH506? a pulse or a line? etc.).
One of my friends recommend me to use LM567, a tone decoder, The output of SFH is connected to the pin 3 of LM567. Exactly, I don't know why to connect like that. And also, I do not know how it work too (plz, do not laugh, I'm just a novice).
By the way, I've heard about solenoid valve. I have to use it to open the tape electrically to make the water flow. I have'nt seen it. Can some one give me some links to it. And explain to me how it work!
Can some one help me explain how SFH506 and LM567 work?
Can you introduce me some circuits that related to or useful to me and my project.
Thank you in advance!
Peter!