its an upgrade.
popular community model
inventables has options too
https://www.inventables.com/technologies/isolated-relay-circuit
and
https://www.inventables.com/technologies/solid-state-relay
its an upgrade.
popular community model
inventables has options too
https://www.inventables.com/technologies/isolated-relay-circuit
and
https://www.inventables.com/technologies/solid-state-relay