GMU:The Conceptual Sensor/Meike Halle: Difference between revisions

GMU:The Conceptual Sensor/Meike Halle (view source)

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 [[File:Fritzing1.jpg]]
+this is the circuit digram og the both sound circuits.
+On the left is the circuit for the alamr bell.
+Basically its a simple 555 timer in astable Mode and i used the different Resistors to get a low humming sound pretty similar to some older door bells.
+after making the circuit i also installed a bell-button next to the front door of my house. therefore i drilled a small hole and made a normally open switsch wich u can close by pushing the bell button with your finger.
 [[File:Fritzing2.jpg]]