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in digital world all devices are connected to smart computer which cumunicate in 0 and 1 but to interface it to real world or human interface we need a DAC. examplea electric kettle having a temprature sensor gving 0 to 5 mA current variation output .if we want to control the heat we need dac converter system in microcontroler to controle the ac voltage system in real time. so maximum devices need dac in it.
all equipments is digital if you went to use it necessrly interface whith DAC to execute all order to receve from romote control or tacticl disply ext to send order and control all analog equipment what to do
In the real world , most of the equipments which we use are digital. And also these equipments will handle the digital signals for tras-reception. But when it comes to human interfaces such as display or a screen of the device or speaker , the Digital to Analog converters are essentially required.
