Discussion in "New Ideas regarding projects" started by    lisha    Apr 2, 2013.
Tue Apr 02 2013, 11:16 am
#1
hi,
i'm trying to make a project on switching tv channels using voice rocognition. here i need to interface a voice module(hm2007) to a at89s52 microcontroller and with the inputs from that voice module i need to send IR signals to the tv like an ordinary remote. I need help in implementing the remote through a microcontroller. can anyone please help regarding this. Its really urgent.
thank you..
Tue Apr 02 2013, 05:30 pm
#2
these days different TV uses different mechanism for transmission at different frequencies. are you targeting any specific TV?
You can read about different tv remote protocols here:
http://www.sbprojects.com/projects/ircontrol/index.php
Mon Apr 08 2013, 08:57 am
#3
I'm basically targeting on basic universal remote.
Wed Apr 10 2013, 02:05 pm
#4
universal remotes uses ICs like IC4201 or ZT102 ZT101 etc. they are single chip remote controller ICs.
Wed Apr 10 2013, 06:20 pm
#5
can these ic's be directly connected to a microcontroller?? if not please suggest something that can be connected directly to phillips nxp 8051.
Mon Apr 15 2013, 04:36 pm
#6
these ICs are designed to work with remote keypad (8x8 matrix). You can connect rows and columns to controller and emulate keypress by activating right row/col combination. This activation can be triggered based on voice command received from user. hope you understand.
Mon Apr 15 2013, 05:45 pm
#7
thanks alot sir. another problem we are facing in our project is that our microcontroller(phillips nxp 8051) is not accepting the output of the voice module. the voice module(hm2007) generates 8 bit data which is given to 8051 but it is not accepting the input even after adding pull up resisters. can u suggest something?? the voice module output is 5v logic level.
datasheet attached
Mon Apr 15 2013, 06:24 pm
#8
You need to provide schematic too. I am not sure where and how you've made connections.
Mon Apr 15 2013, 06:31 pm
#9
are you using the same program given in the pdf?
Tue Apr 16 2013, 10:45 am
#10
no sir but the program v r using is almost the same as the one in the data sheet. n v r connecting the 8 bit output of that voice module to port 0 of nxp 8051. and based on that output the remote channel is changed. but the microcontroller is not accepting the input. we tried running a sample prog to turn on an led with voice commands but it did not work. attaching program and schematic.

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