Good day
I am building a delay on circuit using ne555 timer chip. I'm unable to get this circuit to work for variable voltage input. I have a 47k resistor connected in series to cap 3.3uf to pin 2 and a 47k resistor in series to pin 6 and grounded. The issue I'm having is that when the voltage input increases from just 12v to 13.5v the time delay is almost is 0s but when exactly 12v is input then only will I get my desired time delay. The reason for the voltage spike is because it's supplied from my vehicle while running and while turned off. How will I get the time delay to be the same at 12v and the same at 13.5v? I will attach pics of my circuit for your perusal.
I am building a delay on circuit using ne555 timer chip. I'm unable to get this circuit to work for variable voltage input. I have a 47k resistor connected in series to cap 3.3uf to pin 2 and a 47k resistor in series to pin 6 and grounded. The issue I'm having is that when the voltage input increases from just 12v to 13.5v the time delay is almost is 0s but when exactly 12v is input then only will I get my desired time delay. The reason for the voltage spike is because it's supplied from my vehicle while running and while turned off. How will I get the time delay to be the same at 12v and the same at 13.5v? I will attach pics of my circuit for your perusal.