how to use HT12E for 8 bit data??

[shobhit_goel10]

Hi I need to control 2 stepper motors independently by pc parallel port, wirelessly by rf. that requires me to transmit 8 bit data i.e. 4 bits each for either motor.

I am using an encoder at the transmitter end and giving the output to an rf transmitter. The rf receiver at the receiving end will give output to a decoder from where I can get the transmitted data.

I tried to use the HT12E encoder and HT12D decoder but they can encode and decode only 4 data bits. Is there any other encoder/decoder which can by used for 8 bits of data??

Or can I use HT12E for 8 bits data in some way? pls help..

thanks a lot..

 

[Pommie]

You could send 4 lots of 4 bit data. Make the first 2 bits of each data block an identifier (0-3) and the last 2 bits the actual data. So to send 0xA6 you would send 0010, 0110, 1001, 1110. The blue bits are the data (0xA6 = 10100110) and the other bits are a counter (0-3).

Mike.

 

[shobhit_goel10]

You could send 4 lots of 4 bit data. Make the first 2 bits of each data block an identifier (0-3) and the last 2 bits the actual data. So to send 0xA6 you would send 0010, 0110, 1001, 1110. The blue bits are the data (0xA6 = 10100110) and the other bits are a counter (0-3).

Mike.

Thanks sir for the reply.. sorry I have not understood some part..

does that mean I use 1st 2 bits (AD8 and AD9 ,pins 10 and 11) as addresses and AD10 and AD11 as data?

I have to transmit and receive 8 bits simultaneously. If I use AD8-AD11 as data that makes only 4 bits.
and using only AD10-AD11 as data will make only 2 bits possible at a time, is that right?

for example,
what I want to do is send and receive 1000 0001. At decoding end, each bit of 1000 goes as input to one of the 4 wires of 1st stepper motor.. and 0001 to that of 2nd stepper motor, simultaneously..

 

[Nigel Goodwin]

Dont use those chips, that's not what they are for - they are just simple remote control chips.

If you want to transfer data then use a PIC at each end and program them accordingly., details are in my tutorials.