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You can buy both mechanical and solid-state relay modules. However, solid-state relays are newer and cost a bit more than the traditional relay switch modules that you might already be using in your DIY smart switches or home automation projects.
You can buy both mechanical and solid-state relay modules. However, solid-state relays are newer and cost a bit more than the traditional relay switch modules that you might already be using in your DIY smart switches or home automation projects.