My old Rs-485 hub was getting to small to connect all the device from my Joshua domotica.
Designed a new one with smd components to reduce the size.
The line drivers SN75176 are still dip-8 to change them easy when there’s one broken, not that they ever breakdown (last 10 years zero) but you never know.
It’s stack able for extending the ports.
Design
Schematic
Result 1
Result 2
Download schematic and Eagle pcb files:
1373 Downloads
How much does the system cost if I buy it from you?
Thank you
Hi,
I’m sorry but they are (not anymore) for sale.
Hi I’ve been looking at your schematic and I’m wondering if it makes a difference on which port I use with master and what is rxen jumper used for?
Hi,
It doesn’t matter what port you use for the master, that’s why it’s a hub.
With the RXEN you can block for that port incoming data from the slaves on the section.