Make This Solid-State Relay Driver for Microcontroller

Here is a simple solid-state relay (SSR) driver circuit using a transistor. An SSR is similar in operation to a traditional electromagnetic relay with movable/physical contacts. It employs an optical semiconductor, called photocoupler, to isolate input and output signals; and switching elements such as thyristor, triac, diode and transistor. An important feature of the SSR […]

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