I am in need of a 555 timer that when I apply current to it, it will wait for 1min 30 sec or up to 30 min. The out put after the time needs to power a light and a relay. This is just one part of a big circuit that I built.
I Just resently learned how to use the 555 in astable to have a light flash to the designated hrz. I want this to turn on after a min or two. Could you provide a circuit and the math to determin the R's and C's for the 555 delay circuit. I am new to the electronic world so simplicity is key.
Cool could you explain how to wire the 555, and the math? And how much of a delay could I get out of a 555? Diagram would be nice but anything you want to do would be just fine.
Awsome thanks guys I can do what I want to know. But one more thing. I still need a 30min timer. The most I can get is 20 min maybe according to the math and thats with two 555's. what would be a good timer that would get up to 30min?
I was wondering if this circuit is good. What is the math to have it like a 3-5 sec delay so i know its working without waiting 3 min. And is the output present for the time period or does it wait for the time and then hit the relay.