YOU MUST KNOW ABOUT THESE ELECTRONICS THINGHS

These things are that thing , which we want to know about . It is basically very simple thing which can be easily understandable to all with the help of circuit diagram and description .You are just behind a click the link given below. If any mistake you find , you can post your comment give below . I will very grateful  for your concur .Thank You .

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

• Theft preventer alarm 
•  Power supply failure alarm
  
•  Rain Alarm
  
•  Fire Alarm
•  Infrared beam barrier/ proximity sensor
•  Stereo Channel Selector
  
•  Low cost intercom using transistors
•  Infrared Head Phones
•  Use the CD-ROM drive as a audio CD player without the compute
  
•  Audio Visual Indicator for Telephones
•  Ultrasonic pest repellent
•  Sound Controlled Filp Flop 
• Digital Volume Control
  
•  5 band graphic equalizer using a single IC/chip
•  Car anti theft wireless alarm.
•  IF Signal Generator