Zagadka's Site

Today I built some prototype RS485 nodes for a project I am working on with a mate. Each RS485 node is going to be equipped with a pic micro controller to do any logic or to connect with peripheral sensors. At the stage the pic16f88 because it has all the goodies like built in USART and ADC etc. I may make a different version with a 40 pin pic either a big DIP one or a QFN or something.

The nodes will be auto-terminating. So when you add a node to the end of the bus, it will terminate the line and tell the node before it to stop terminating the bus.

I tried out a new technique using enamelled copper wire for these prototypes.