I have been making this Alarm Circuit using a 555 in Monostable mode, and a 555 in Astable mode. I have however come across a problem, I wanted to create a delay, in which the alarm is 'enabled'. In other words, as soon as the trigger is pressed, I would like a 5 second or more delay, before the buzzer and LED begin to flash, buzz etc. I had planned to use a capacitor, but I am not sure where to put it, or what capacitance I should use. Please can someone help me, I am a bit of a novice at this.
I have attached an image of the circuit, with the Trigger and reset labelled.
Thanks
Chris
I have attached an image of the circuit, with the Trigger and reset labelled.
Thanks
Chris
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