Single Chip Memory Call Bell furthermore Transistor tester circuit using 555 timer additionally Burglar Alarm Using Ldr together with Rain Alarm 555 Timer likewise Create A Motion Sensing Alarm With An Arduino And Ir Sensors. on transistor door alarm circuit a
{"Image ImageWidth": "1304", "Image ImageLength": "435", "Image BitsPerSample": "[8, 8, 8]", "Image PhotometricInterpretation": "2", "Image Orientation": "Horizontal (normal)", "Image SamplesPerPixel": "3", "Image XResolution": "96", "Image YResolution": "96", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "Adobe Photoshop CS6 (Windows)", "Image DateTime": "2014:08:15 17:55:33", "Image ExifOffset": "232", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "382", "Thumbnail JPEGInterchangeFormatLength": "3117", "EXIF ExifVersion": "0221", "EXIF ColorSpace": "Uncalibrated", "EXIF ExifImageWidth": "1304", "EXIF ExifImageLength": "435"}