why to use relays?

[manohar]

           I done a wireless robo control project in that output of the micro controller  is given to the transisters and the emitter output of the transister is given to the relay & the relay output is given to motor.

 

 

           But my question is why we use relays even we are getting sufficient current and voltage from the transisters to drive motors?

 

 

[Syed Aameer]

 if you are using 6v /12v/ or more volts motor then u can control this through your microcontroller .which gives only 5v and less current.

 

Advantages of relays: Relays can switch AC and DC, transistors can only switch DC. Relays can switch high voltages, transistors cannot. Relays are a better choice for switching large currents (> 5A). Relays can switch many contacts at once.

[Author]

Posts