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Two-way relay

Overview

This is my first time uploading to an open source platform, so the work is not very good. I hope you masters will not criticize me.
Relay principle: When the coil is energized and turned on, the normally open contact of the relay is closed, RELAY0 and RELAY1 are turned on, thereby controlling the conduction of the subsequent circuit. The role of diode D3 is the freewheeling function of the relay coil. When the relay is energized or disconnected, a large back electromotive force will be generated. The absorption of the reverse diode will have a good effect. Industrial field experiments have proved that if this diode is removed, the interference formed is very large, which will cause the microcontroller system to reset.

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Update:2025-06-19 17:23:16

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