No.I thought of exactly the same but i dont have an oscilloscope now so measuring it with a multi....but wont the voltage drop close to zero when tsop detects ir???
Very reliable.thanks for the additional info...and I do have another doubt -is ir remote reliable.......... because of noise from external light and all?
Well, IR is cheap and simple. I would go with it and see how it goes.ya it is for a competition but the thing is that it is going to be held in a room so I thought ir would be fine........rf might get too costly right?
It is impossible to predict exactly what will be transmitted. RC5 protocol does not specify that TV button '1' will produce any particular command or address.I want to know if I press '1' of Remote the what exactly the data I get at output of TSOP1738.
Unmarked freeview remote uses RC5 protocol 14 bits 36kHz 1.778ms per high/low bit,
24.889ms whole command
0=0.889ms mark, 0.889ms space 1=0.889ms space, 0.889ms mark
start bit = 1 (only second half of bit (mark) is detectable as space is lost in no data period
start bit = 1 (i.e. two start bits) or field bit in extended mode, where 0 denotes commands 64 to 127 decimal
toggle = x alternates between key presses to distinguish continued press
0 msb
1
0 5 bit address of 08 hex
0
0 lsb
x msb
x
x
x 6 bit command vol- = 11 hex
x
x lsb
00to09 0-9
0a exit
0c power
0d mute
0e tv/dtv
10 v+
11 v-
12 up
13 down
14 select
15 left
16 right
1e wide
20 p+
21 p-
22 guide
26 subtitle
32 yellow
34 blue
35 menu
36 green
37 red
3c text
3f i
Sorry, but I cannot help with AVR. I only use PIC microcontrollers.If I use Sony Remote is it easier for me to decode it at INT0 of AVR ATMEGA8..???
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