Can I make LM335 temperature output into 4bits?

[budhy]

lm335 pic

did u mean that i should not use 0000=22'c this method to transmit?

Yes! you have 10 bit (1024) resulution if you send the whole 10 bit data! Much more precise than 4 bit data only.

send the 10 bit ADC data at 3 transmission as data1,2,3??
Can explain detail how it work?

Like this example code:

void sendPT2262(unsigned char c){
unsigned int  wait;
     datapins = c & 0x0F;           //PT2262 data pins     
     TE = 0;                        //PT2262 Transmit Enable 
     wait = 0xffff; while (wait--);
     TE = 1;
     wait = 0xffff; while (wait--);    
};

void main(void){
char ADRESH, ADRESL;
     sendPT2262( ADRESH    ); // bit 8 & 9
     sendPT2262((ADRESL>>4)); // bit 4..7
     sendPT2262( ADRESL    ); // bit 0..3
}

I intend to do the project using PT2272 to transmit the tempearture signal and receive by PT2262.

Are you sure?
From the datasheet:

PT2262 is a remote control encoder paired with PT2272

PT2272 is a remote control decoder paired with PT2262

 

[Cleong]

+working of lm335 sensor

did u mean that i should not use 0000=22'c this method to transmit?

Yes! you have 10 bit (1024) resulution if you send the whole 10 bit data! Much more precise than 4 bit data only.

send the 10 bit ADC data at 3 transmission as data1,2,3??
Can explain detail how it work?

Like this example code:

void sendPT2262(unsigned char c){
unsigned int  wait;
     datapins = c & 0x0F;           //PT2262 data pins     
     TE = 0;                        //PT2262 Transmit Enable 
     wait = 0xffff; while (wait--);
     TE = 1;
     wait = 0xffff; while (wait--);    
};

void main(void){
char ADRESH, ADRESL;
     sendPT2262( ADRESH    ); // bit 8 & 9
     sendPT2262((ADRESL>>4)); // bit 4..7
     sendPT2262( ADRESL    ); // bit 0..3
}

I intend to do the project using PT2272 to transmit the tempearture signal and receive by PT2262.

Are you sure?
From the datasheet:

PT2262 is a remote control encoder paired with PT2272

PT2272 is a remote control decoder paired with PT2262

yes,i know that pt2272 is a remote control decoder.
and it only can send 4 bits as i know.
thats y i mention i wan to send 0000=22'c in the begining.
since it only can send 4 bit , then how it can send until 10bits?

 

[budhy]

lm355 replacement or equivalent

yes,i know that pt2272 is a remote control decoder.
and it only can send 4 bits as i know.

I mean use PT2262 to send data, and PT2272 to receive data

since it only can send 4 bit , then how it can send until 10bits?

My C sample code demonstrate how to send 10 bit data at 3 transmissions! Please read it carefully

 

[rajesh.shaw]

lm335 an

I am using LM335 ST microelectronics temp sensor and interfacing with on chip ADC of cygnal c8051f020. This ADC has Vref of 2.4 V and Temp sensor is working at 10mV/Kelvin. The ADC is saturating at 2.4 V. I am not able to use the ADC for Sensor (voltage) output more than 2400 mV, please tell me how to use for greater temp range, i.e > 2400 mV?