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openmv驱动继电器可以用哪些引脚？24v继电器接dcdc后怎么接线与openmv相连？
OpenMV的P0~P9都可以输出TTL电平。也就是高电平3.3V，低电平0V。
你看继电器的说明书，应该是有参考电路。每个继电器型号不一样，电路也不一样。