Would this (infared) reciever circuit work?

So I was just wondering if this (admittedly rather poorly designed) circuit would work.
The "remote" would have three switches, the first switch would be directly attached to LED (ignore the required resistor), the second and third would each be attached to a (different value) resistor and a wire to the LED.

The resistor (on the transmitter) are in place to reduce the current supply to the transmitter and therefore lower the light levels. The lower light levels mean that the resistors (on the receiver) can reduce output from the phototransistor emitter and not trigger the corresponding transmitter.

I realize the drawing is poor and the circuit wouldn't necessary be very useful, but assuming you used the correct values for the component, would this work?



Use of the transmitter:
Transmitter Switch 1 (no resistor) - Buzzer1,Buzzer2 and Buzzer3 beep (because the signal is strong).
Transmitter Switch 2 (R1) - Buzzer1 and Buzzer2 beep, Buzzer 3 does not beep because its resistor filters out the signal.
Transmitter Switch 1 (R2 = 2xR1) - Only Buzzer1 beeps, the signal is too weak to trigger the other transistors.

Your extremely simple circuit is missing important parts.

Using the strength of the IR that is received is a poor way to do remote control because the strength depends on distance and if the transmitter is pointing directly at the receiver.

Not a chance!

The resistors do nothing to filter the signal at all and trying to use different light levels to control different devices will never work. An IR LED does not emit a uniform light beam, the radiation pattern is much the same as a visible LED, with certain parts in the width of the beam being brighter than others. If you try to use the received light level you would find even the slightest movement of the LED or sensor would change which devices you operated. Ordinary sensors are also able to pick up other sources of IR and these would result in the wrong levels being detected anyway.

It would be FAR more reliable to send a coded signal from emitter to sensor then decode it to as many different outputs as you want. It will also make it much less sensitive to position, angles and ambient light.

Brian.

Not only that, but there are PLENTY of IR sources that will interfere with proper circuit operation.
The most important are the sun and incandescent lamps. However, even fluorescent lamps emit IR energy, although at reduced levels.