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RF Transmitter and Receiver

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LoyC

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hi, im trying to build an RF wireless remote control Power Extension with 4 sockets.

The chips im using is Holtek 12D decoder and HT12E encoder. The schematic diagram is as follow:

Now here's my problem: (i) To switch on the D0 on the receiving side, i need to push switch D0 following by TE switch on the transmitting side. While to switch off D0 , i need to repeat the steps before which requires pushing 2 switches as well.

Thus, im trying to use PIC16F887 microcontroller chip to replace these 2 switches with only 1 switch. Any suggestions on how to do it?
 

nikhil_jain

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why do you have to press the TE switch.. just connect the TE pin to ground (i guess it is active low) before switching on the D0. and afterwards you can take off the connection or may be leave it that ways only.
 

LoyC

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I'm trying to build a remote control for turning on electrical appliances.

I can't connect the TE switch directly to the ground as the battery will die off very fast if transmission is going on non-stop.
 

nandhu015

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I'm trying to build a remote control for turning on electrical appliances.

I can't connect the TE switch directly to the ground as the battery will die off very fast if transmission is going on non-stop.

You can use a microcontroller in sleep mode with pinchange wakeup. The logic will be simple.

But the microcontroller may consume some battery
 

LoyC

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You can use a microcontroller in sleep mode with pinchange wakeup. The logic will be simple.

But the microcontroller may consume some battery


Elaborate pls.

Btw,I'm trying to pair up the HT12E on the transmission side with a microcontroller( PIC 16F887) to control the data input and address of HT12E.
 

ctownsend

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with no microcontroller or see below for mcu connection
 

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    LoyC

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LoyC

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with no microcontroller or see below for mcu connection

ctownsend, thx 4 the help... the second diagram is just what i needed.
i need to use PIC mcu to do this. Since i'm new in programming, can u give me some guidance on how to do it? eg. how many i/o ports i need, and some examples on how to do it.

TY.
 

ctownsend

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Sorry, I am not a PIC guy. IF you do it with 8051 or avr, (in assembly) I can help you.

Search this forum for "Holtek" I am sure you will come up with what you need.
 

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