- Joined Dec 2, 2006
I am an new engineering student and I cant figure out how to make a circuit with a blinking LED that stays on for ten second intervals. What I have so far is a circuit with two variable resistors, a resistor and an op amp. My led turns on and off already when I vary the resistor to cange the voltage accros them. How do I use capacitors and what calculations would I use to make it stay on for ten seconds.