556 Timer

I'm very new to this elecrronic stuff, but I was able to do what I needed with the 555 timer, but I am lost with trying to get the 556 to do what I need.

I'm using a 556 timer and below is what I would like to happen. If anyone can make up a schematic or something to get me going in the right direction I would surely appreciate it. Please contact me if more information is needed.

With Mercury switch closed (1st timer) Turns on Buzzer for 2 seconds (which I want) unless switch stays closed Gives power to second timer (momentary switch) even if the 2 seconds on the 1st timer has elapsed. With Momentary switch closed (2cd timer) Sends power to a LED Continues to stay closed till 1st timer switch is activated again

Thank You for Your Time,


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"DaveK" wrote in news:1173495989.219147.157370@



Your 556 is two 555s. Look at pin layout diagram, and simply map the signals to the other pins. If I remember right, one 555 is on one side and the other is on the other. You can't put a 556 in the same socket as a 555 and have it work.


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