Hi all...
Im trying to create a cct that will allow me to use a PIC microcontroller to transfer data complient to ARINC-429 aviation standard. This standard uses bipolar return-to-zero modulation for data transfer.
Basically you have two wires for transmitting data, for a logic '1' to be transmitted one wire is to be +5V and the other to be at -5V followed by a null state (return to zero). I have included an attachment with a diagram of this.
What i need is to create a circuit that will allow me to apply +-5V and 0V onto the two wires. I have come up with a rough idea of a cct, any comments/tips/help would be much appreciated.
In my diagram i have used Pin0 to determine the '1' and '0', and Pin1 to supply 5V for the null value.
Cheers
Liam
Im trying to create a cct that will allow me to use a PIC microcontroller to transfer data complient to ARINC-429 aviation standard. This standard uses bipolar return-to-zero modulation for data transfer.
Basically you have two wires for transmitting data, for a logic '1' to be transmitted one wire is to be +5V and the other to be at -5V followed by a null state (return to zero). I have included an attachment with a diagram of this.
What i need is to create a circuit that will allow me to apply +-5V and 0V onto the two wires. I have come up with a rough idea of a cct, any comments/tips/help would be much appreciated.
In my diagram i have used Pin0 to determine the '1' and '0', and Pin1 to supply 5V for the null value.
Cheers
Liam