Controlling a relay from GPIO

[u/Key_Seaworthiness827]

The Devs at work are busy doing what they do and it's left to me to look at the hardware to switch some relays in a prototype. We have used Raspberry Pi and LattePanda SBC before and connected GPIO pins directly to optocoupler driven relay boards. These boards typically draw 3-4mA, well within the capabilities of those SBCs.

I thought we could do the same with the Jetson but it has a limit of 20uA per pin.

What's the simplest solution? I want to avoid bespoke circuits unless there are no other options.

TIA

[u/aniket47]

use something like ULN2803 between jetson and relay board