I thought of using 555 timer in the transmitter to produce 9 different frequencies... the output of the 555 timer is connected to an IR LED to be transmitted.
I want to ask what IC can be used to detect a unique IR frequency that would trigger the certain operation indicated by the button numbers above.
I also want to know what circuit should I use to change the intensity of the light bulbs using remote control.
Yes, there is. You can use a DTMF encoder at the transmitter side and, a DTMF decoder at the receiver side.
Now, you have not only the 9 freqiencies you need but also 6 extra frequencies for future improvements.
I thought of using 555 timer in the transmitter to produce 9 different frequencies... the output of the 555 timer is connected to an IR LED to be transmitted.
I want to ask what IC can be used to detect a unique IR frequency that would trigger the certain operation indicated by the button numbers above.
I also want to know what circuit should I use to change the intensity of the light bulbs using remote control.
Yes, there is. You can use a DTMF encoder at the transmitter side and, a DTMF decoder at the receiver side.
Now, you have not only the 9 freqiencies you need but also 6 extra frequencies for future improvements.
Without the use of any microcontroller, it is very difficult to decode and utilise IR code to do the required tasks for a multichannel remote. The circuit becomes quite big with its complexity too. Cheers
i do not care about the circuit complexity, no problem if it is too big, my problem is where i can find such a circuit? this is to my students as a final year project and i have no enough time for them.
You may consider buying this book with the project "Remote controlled switch board" without using any microcontrollers. The said project was designed with Tone encoder and decoders using IR transmission. I am a regular reader of the magazine but as the said comiplation belongs to the year 1998, i am not finding the book with me. The said project book is available thru the given link. Cheers https://www.kitsnspares.com/user/showcircuit.asp?id=508