12-28-2021, 04:05 PM
(12-28-2021, 05:39 AM)MarzioM Wrote: Hi Rob,
I also think it is a great idea, I fully agree with your choice.
Working in full brainstorming, what do you think about interfacing the various modules with a standard bus, something similar for example to RS485?
The logic of each module would be bus-powered, providing a separate power supply input only for the output modules.
This would make the system fully modular
Marzio
Hi Marzio, thanks for your feedback. One day I may go more module but as suggested I would need a good bus. In the past I've experimented with I2C however that didn't go as planned as it wasn't reliable. That I2C signal booster is nice, I've played with similar, however still not ideal as the low/high signal still travels through the same piece of wire with little spacing between the voltages. If noise gets in the low signal can get lost. Apparently for I2C the best method is to convert the I2C to a differential signal, SCL and SDA become 4 wires like a RS485 bus. This makes it more immune to noise as you can bump up to 12v/24v where a high signal is clear. This approach is more costly though as you need a signal converter at both ends.
I think some commercial controllers use CAN bus or similar, this is what cars and some airplanes use. I've looked into this an it looks amazing, down the road I hope to explore it more.
