Electronics Question About 3-Wire Ports

[jpearman]

This info was specific to the cortex, but the V5 is similar. Due to the series resistor and the fact that the control signal is connected to a microcontroller, almost no current is available,

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…