CMOS output with an emitter follower can drive a 5V relay nicely as the relays normally have a spec of 3.5V. This saves power and require no flyback components.是什么意思_CMOS output with an emitter follower can drive a 5V relay nicely as the relays normally have a spec of 3.5V. This saves power and require no flyback components.在线翻译_英语_读音_用法_例句