My project is to sound a short (perhaps 2 second) audible alert when a door is opened up.
And then to reset itself when the door closes.
Again the only time the alert should sound is on the door opening (only 2 second regardless how long the door remains open).
How should I build this?
Should it be 555 or 556 timer based, or 74121 or something else.
And should I use a pezio buzzer for the audible alert.
Thank you
steven
And then to reset itself when the door closes.
Again the only time the alert should sound is on the door opening (only 2 second regardless how long the door remains open).
How should I build this?
Should it be 555 or 556 timer based, or 74121 or something else.
And should I use a pezio buzzer for the audible alert.
Thank you
steven
Last edited: