Hi all
i'm trying to create a circuit that uses a 555 in astable mode to flip a led on and off for a 2 minute period - this is fine and simple enough. what i need is for an alarm circuit to activate when the LED state changes and have a reset function to silence the alarm until the next change of state of the LED when the alarm circuit should be triggered again. i have no issue with the alarm circuit, again this is simple enough but i cant work out how to use a reset that wont automatically get triggered straight away by the LED state being either high or low - if the above makes sense - please help! i'm thinking i need some kinda of latching mechanism but i'm new to this so its hard to suss out (for me at least)
any help very much appreciated.
Many thanks
Mark
i'm trying to create a circuit that uses a 555 in astable mode to flip a led on and off for a 2 minute period - this is fine and simple enough. what i need is for an alarm circuit to activate when the LED state changes and have a reset function to silence the alarm until the next change of state of the LED when the alarm circuit should be triggered again. i have no issue with the alarm circuit, again this is simple enough but i cant work out how to use a reset that wont automatically get triggered straight away by the LED state being either high or low - if the above makes sense - please help! i'm thinking i need some kinda of latching mechanism but i'm new to this so its hard to suss out (for me at least)
any help very much appreciated.
Many thanks
Mark