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IR remote control with 8051

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kit_714

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ht12a circuit

Dear All,

How can i make a simple IR remote control with the following materials??

1 number keypad, AT89c2051, HT12A encoder and HT12D decoder

And can you all give me some source code for reference??

Thanks..
 

ir remote control source code

It seems both HT12A & HT12D are encoders. The difference between them
is the operating voltage. You need an IR led as transmitter and an IR receiver
for filtering out the carrier.

Measure the pulse width of IR reciver output. It is not difficult to find an example
from Amel.
 

ir remote using ht12a

Thanks for your suggestion...

In fact i have used an IR led transmitter and IR receiver to build my circuit. I have tried it in the bread board, use few switches connected to the data pin of HT12A (transmitter circuit) and use several LEDs at the data pin of HT12D (receiving circuit) and get a proper result...

However, when i use AT89c2051 to give signals to the data pin of HT12A instead of switches, it doesn;t work. What's the problem of my design??

Hope some one can give me suggestions...and a sample of source code is more preferable...Thanks....
 

ht12a ht12d

waterman said:
It seems both HT12A & HT12D are encoders.
HT12E is Encoder and HT12D is decoder.
 

ir remote source code 8051

In fact i have used an IR led transmitter and IR receiver to build my circuit. I have tried it in the bread board, use few switches connected to the data pin of HT12A (transmitter circuit) and use several LEDs at the data pin of HT12D (receiving circuit) and get a proper result...

However, when i use AT89c2051 to give signals to the data pin of HT12A instead of switches, it doesn;t work. What's the problem of my design??

Hope some one can give me suggestions...and a sample of source code is more preferable...Thanks....
 

Re: ir remote using ht12a

Thanks for your suggestion...

In fact i have used an IR led transmitter and IR receiver to build my circuit. I have tried it in the bread board, use few switches connected to the data pin of HT12A (transmitter circuit) and use several LEDs at the data pin of HT12D (receiving circuit) and get a proper result...

However, when i use AT89c2051 to give signals to the data pin of HT12A instead of switches, it doesn;t work. What's the problem of my design??

Hope some one can give me suggestions...and a sample of source code is more preferable...Thanks....

Dear Kit,

Can you please help me out, I’m also doing IR remote control using HT12A and HT12D pair.

But it simply doesn’t work, I get frustrated with this circuit.

As you mentioned in your post, u have done it successfully using IR (Tx)+ HT12A & IR (Rx) +HT12D.

It will be of immense help if you provide circuit diagram for HT12A and HT12D project which u got success…

Waiting for your valuable reply….

Regards,
T.D.
 

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