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555 astable monostable


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Hi, I'm Nitish and I love elctronics :P
I'm scheduled to take a half-course Electronics GCSE in a week's time and I'm struggling to grasp the concepts of a 555 timer circuit. I understand the difference between a monostable and astable, but I'm required to be able to tell the difference from a circuit diagram (with no time graph etc) can anybody tell me the way to tell between the two types of circuit JUST from a circuit diagram? I believe it's something to do with the pins which are connected to each other (e.g. in an astable pins 2 and 6 connect directly to each other) more info required
please please help 

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