sammyTheElectronicsGuy
- Apr 13, 2010
- 1
- Joined
- Apr 13, 2010
- Messages
- 1
Scenario.
a circuit is required for the following to switch on and off a motor and some indication lamps.
the circuit is the following
a spdt on/off switch
a reset switch
a 5v square wave clock pulse operating at 1hz
a number of limit switches A,B,C,D.
a light sensor.
the motor is required to turn on for 25 seconds after the power is switched on provided the A,B,C,D meet A'CD+AB'D+ABC' ( ' beside a letter means not)
after it will stay off until reset button is pressed.
i have tried to build this circuits on multisim using 2 74161n's 4 bit counters. unfortunately to no succes. any info anyone could give me would be much appreciated.
cheers sam
a circuit is required for the following to switch on and off a motor and some indication lamps.
the circuit is the following
a spdt on/off switch
a reset switch
a 5v square wave clock pulse operating at 1hz
a number of limit switches A,B,C,D.
a light sensor.
the motor is required to turn on for 25 seconds after the power is switched on provided the A,B,C,D meet A'CD+AB'D+ABC' ( ' beside a letter means not)
after it will stay off until reset button is pressed.
i have tried to build this circuits on multisim using 2 74161n's 4 bit counters. unfortunately to no succes. any info anyone could give me would be much appreciated.
cheers sam