I have a Panasonic air conditioner which comes with a wired remote controller CZ - RD513C attched to the wall and has no infrared. I want to make a circuit connecting to STM32F746 to automate the temperature control from the STM display, e.g. set Monday morning 8 am 27°C. There are two wires coming out of the cable remote controller, one is a ground and the other is a power + signal line. I'm thinking using the circuit below to control. However, it seems there's a frequency difference problem, the carrier frequency of TDA5051A is 132.5 kHz, but the AC control signal frequency is 18,75kHz. Does anyone have any idea how this problem could be solved? Any ideas are welcome
Thanks a lot!
Stephanie

 

Here is some parameter of TDA5051A

 

I have a Panasonic air conditioner which comes with a wired remote controller CZ - RD513C attched to the wall and has no infrared. I want to make a circuit connecting to STM32F746 to automate the temperature control from the STM display, e.g. set Monday morning 8 am 27°C. There are two wires coming out of the cable remote controller, one is a ground and the other is a power + signal line. I'm thinking using the circuit below to control. However, it seems there's a frequency difference problem, the carrier frequency of TDA5051A is 132.5 kHz, but the AC control signal frequency is 18,75kHz. Does anyone have any idea how this problem could be solved? Any ideas are welcome
Thanks a lot!
Stephanie
View attachment 133536

Hi Stephanie,

I am also very junior at electronics but have been looking at doing similar with a Panasonic CZ - RD513C. Did you ever complete this project, and/or can you provide any write-up suggestions from what you managed to achieve?

Thanks in anticipation

Regards,
AustralianJim

 

Hi Stephanie,

I am also very junior at electronics but have been looking at doing similar with a Panasonic CZ - RD513C. Did you ever complete this project, and/or can you provide any write-up suggestions from what you managed to achieve?

Thanks in anticipation

Regards,
AustralianJim

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