Corky
Member
I know this is a very common circuit to build as a beginner but i cant get my head around it, this is my undertsnading so far:
the ultra sonic transmitter and reciever work as an object detection device, when the reciever is activated the small voltage travels to the 3 op amps and gets amplified to make the led come on which in turn makes the relay switch on, but i am having trouble with the need for the 555 timer, i have simulated this circuit and i still cant understand what it does, i understand the normal operation of a 555 timer which has possibly confused me more.
any advice or infomation on this would be much appreciated
Dale