2445Views6Replies

Author Options:

what is basic principle involved between ir transmitter and ir receiver and how do they work? Answered

Comments

The forums are retiring in 2021 and are now closed for new topics and comments.
0
mpilchfamily
mpilchfamily

Best Answer 8 years ago

The transmitter has an IR LED in it and the receiver has an IR detector in it. When you hit a button on the transmitter it flashes a code with the IR LED. The receiver reads those flashes and then performs the action associated with that code.

0
frollard
frollard

Answer 8 years ago

+1

To make the system more robust, while sending data at a few thousand kbps, the led actually flashes at 40khz, such that '40khz flashing' is counted as 1, and 'nothing' is counted as zero. That way, you can subtract any background light/noise from the equation so long as it isnt flashing. The faster flashing also acts as a clock signal.

0
steveastrouk
steveastrouk

8 years ago

@Frollard.

Ermm. No, the signal is Manchester encoded.

0
Jayefuu
Jayefuu

8 years ago

Homework? Did you try searching online first?

0
sandiri
sandiri

Answer 8 years ago

yes

0
steveastrouk
steveastrouk

8 years ago

Infrared light. flashing on and off very quickly.