PIC Based RS485 Multiplexer


Posted on Nov 14, 2012

I decided to implement this using a PIC 16F84 for both an encoder and decoder, and use RS-485 drivers (DS26C31 and DS26C32) to drive the 350m cable. I only needed five I/O pins per PIC, so this could have been implemented using the smaller 8pin 12C508 device, but the 16F84 has the advantage of being reprogrammable, and PCB size or cost wasn`t an issue anyway. The design presented here can be easily modified for any number of bits and any desired interface RS-232, Fibre optic, almost anything.


PIC Based RS485 Multiplexer
Click here to download the full size of the above Circuit.




Leave Comment

characters left:

kumar   Jul 14, 2008

rs485 using in pic

New Circuits

.

 


Popular Circuits

Rectification using a Gyrator Circuit
Bluetooth for Symbian OS Mobiles
Nickel Metal Hydride ( NiMH ) Charger
Universal Compander
Simple Voltage comparator using CA3140
netduino Motor not working via transistor
LED Volt Meter Circuit LM324
Simple NiCd Battery Charger
Voltage - frequency conversion circuit
By the driving capacitive loads MAX4223 ~ MAX4228 circuit diagram



Top