blackhope121
New Member
Hello all,
I designed a circuit that controls a simple 12 v relay. The relay is going to operate a valve that opens and closes. The valve as of now has a momentary rocker switch; holding it one way opens the valve and holding it the other way reverses polarity and closes the valve.
I want to replace switch that comes on the valve and use the relay to operate the valve
What I cannot figure out is how I can make the valve operate for only 5 seconds each way.
Basically when the relay is on i dont want it to be continually trying to open the valve and when the relay is off to be continually trying to close the valve.
I am experimenting with 555 timers but the configurations Ive seen use a momentary switch to trigger the timer. Since the relay is supplying constant power to the 555, the 555 just repeats its timed cycle over and over
any ideas are greatly appreciated
I designed a circuit that controls a simple 12 v relay. The relay is going to operate a valve that opens and closes. The valve as of now has a momentary rocker switch; holding it one way opens the valve and holding it the other way reverses polarity and closes the valve.
I want to replace switch that comes on the valve and use the relay to operate the valve
What I cannot figure out is how I can make the valve operate for only 5 seconds each way.
Basically when the relay is on i dont want it to be continually trying to open the valve and when the relay is off to be continually trying to close the valve.
I am experimenting with 555 timers but the configurations Ive seen use a momentary switch to trigger the timer. Since the relay is supplying constant power to the 555, the 555 just repeats its timed cycle over and over
any ideas are greatly appreciated