I have a school project in wich I have to use a pic, and emulate PWM to actuate a relay(or many relays one for each output port).
The ideea is to reduce power consumption in such a board design(a circuit with many relays), because of the different current needed to lift the relay, and to mantain a relay actuated.
Because I have to emulate the PWM output, I want to use a PIC16F84(and not a PIC wich already has PWM output), since I used one before in another project.
I want to design a circuit, and because I am a beginer, I am not shure it's that simple to just connect the outputs directly to the relays and not use any additional transistor for amplification.
The relay's are left for me to choose, and I would choose those with small input voltage and current, so that I can drive them directly from the PIC.
Thank you all for suggestions!
The ideea is to reduce power consumption in such a board design(a circuit with many relays), because of the different current needed to lift the relay, and to mantain a relay actuated.
Because I have to emulate the PWM output, I want to use a PIC16F84(and not a PIC wich already has PWM output), since I used one before in another project.
I want to design a circuit, and because I am a beginer, I am not shure it's that simple to just connect the outputs directly to the relays and not use any additional transistor for amplification.
The relay's are left for me to choose, and I would choose those with small input voltage and current, so that I can drive them directly from the PIC.
Thank you all for suggestions!