Hello
I have 3 IR receivers at 38Khz and 1 IR transmitter. (Placed as shown in the image)
Is it possible to transmit a signal only to the receiver which is directly opposite of the transmitter? (like laser beam)
Thanks
No.
Thanks for your reply.
I was thinking something like that.
How it works?
Why ask the badly framed question when you have that video?
Because I don't know if the leds illuminate dimmer when the transmitter is not directly opposite of them or don't illuminate at all..
Maybe the leds still receive some weak signal
Because I don't know if the leds illuminate dimmer when the transmitter is not directly opposite of them or don't illuminate at all.
It is going through an arduino which produces a digital output so assuming the IR signal reaches a threshold it is just on unless it is something fancy like analogue in and PWM out.
What do you actually want to do.
I want to built something like that
The problem is the IR diffusion so the receiver always detects the IR signal
The problem is the IR diffusion so the receiver always detects the IR signal
Which is why I made the comment in reply #1
That video uses a receiver with a built in amplifier so it is quite sensitive. The first uses just an IR photo diode which is not sensitive at all. The beam width of the emitter is large. You might be able to narrow it down by putting the receiver and emitter at the end of a long tube. However the longer the distance the more problems you will have.
Another way to approach the problem is the party-line or broadcast solution such as I2C.
Assuming the targets are programmable, transmit each message with a prefix which addresses the proper target. Each target is assigned its own address.
What is the application? You will get better answers if you indicate the problem to be solved.
Joe
Is it possible to transmit a signal only to the receiver which is directly opposite of the transmitter? (like laser beam)
Yes, when using a simple optics to focus the LED's beam..
Yes, when using a simple optics to focus the LED's beam
But now you have the problem of accurate aim. I an not in favor of 'forcing' a technology into a role.
Some of idea of the intended application would be helpful.
Joe