Hi folks, I'm new here and I need some help. I am stumped on a project. I am trying to build a 5 second timer that is turned on by a voltage change from 12 VDC to 13.8 VDC. When the voltage change is sensed by the voltage comparator, two things happen a buzzer and a timer will turn on. After the 5 second delay, the buzzer must turn off. I have tried to build this circuit in MultiSim and am successfull creating each portion individually. However, when I try and put them all together it doesn't work. I really could use some help here. I am using a voltage divider to run the comparator and a LM555 timer to run the 5 second timer. I am also using a low voltage buzzer (I think it is 5 VDC) in the circuit and a low voltage relay (3VDC). Any help from one of you genius' would be greatly appreciated!!! Thanks, Rivy1992
Theres no need to post the same question in two different threads in two different forums, people who want to answer your question will find it even if you only post it once and people who don't will just find it rude. Moriquendi
