[Andrew Sowa] wanted to use an off-the-shelf relay board from Numato Labs. The board lacks a suitable computer interface, which meant that [Andrew] would have to build one, and its input connectors ...

There was an error while loading. Please reload this page. This project involves designing a PCB for a relay card using the ULN2803 Darlington transistor array to ...

We have three cards used in our old office for T1, Frame Relay, ADSL connections. Maybe not all, but the T1 and frame relay for sure. Google has suprisingly been very unhelpful. Maybe some of you ...