the addition relay sield seemed a bit too much
You don't need to use shields.
The SSR is a much better choice than attempting to use pins to drive relay coils. Keep in mind that relay coils require diodes to suppress inductive voltage spikes.
the addition relay sield seemed a bit too much
You don't need to use shields.
The SSR is a much better choice than attempting to use pins to drive relay coils. Keep in mind that relay coils require diodes to suppress inductive voltage spikes.