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

Motorcycle Alarm
Electric Fence circuit
Solid state stepping switch
Tone-decoder
mpc576h-amplifier-circuit-diagrams.html
fm antenna booster circuit
tube <77> vco
Static Electricity / Negative Ion Detectors
DC-DC converter to step up input voltage
555 monostable trigger timing circuit
Proximity switch integrated circuit composed of the magnetic field sensor HMC1001
Voltage output type angle detection circuit signal conditioner UZZ9000 magnetoresistive sensor KMZ41



Top