hello everybody,
Monday an idea popped up from, my brain regarding controlling a dc motor(i m here talking about the small motors once used in video casette recorders or tape recorder which used magnetic tapes to record audio and video films .)
i thought that i could somehow controll the motor usin one relay and a comparator circuit which will compare the voltage with a reference voltage when the voltage will be less that the reference voltage then a negative voltage will be given to motor ,it will run in reverse direction else if the voltage is higher than the reference voltage than the motor will run in forward direction when no signal appears from the comparator thaen motor wont get any power.
i have planned to use a pc parallel port wire to give controlling signals to the relay .
my question :
1)how should i compare the reference signalwith that of pc?
2) can the motor withstand the fluctuation in the duty cycle?
3)is it possible to control the motor by varying its duty cycle alone?
with regards
shankbond
Monday an idea popped up from, my brain regarding controlling a dc motor(i m here talking about the small motors once used in video casette recorders or tape recorder which used magnetic tapes to record audio and video films .)
i thought that i could somehow controll the motor usin one relay and a comparator circuit which will compare the voltage with a reference voltage when the voltage will be less that the reference voltage then a negative voltage will be given to motor ,it will run in reverse direction else if the voltage is higher than the reference voltage than the motor will run in forward direction when no signal appears from the comparator thaen motor wont get any power.
i have planned to use a pc parallel port wire to give controlling signals to the relay .
my question :
1)how should i compare the reference signalwith that of pc?
2) can the motor withstand the fluctuation in the duty cycle?
3)is it possible to control the motor by varying its duty cycle alone?
with regards
shankbond