Questions about solenoid connections

[jpearman]

take a look at this from 2014

Cortex digital IO ports and the pneumatics driver

I’m going to try and explain why we sometimes have problems with the pneumatics firing and why different programming options are behaving differently. To understand what’s going on some background knowledge is needed on how the digital IO ports are configured by firmware and what features the specific micro controller in the cortex has. To start, lets look at the simplified schematic of a digital IO port from the cortex user manual. [cortex_digital_port.jpg] This shows the 1k ohm series res…