CALL PREVENTION AND PARALLEL TELEPHONE WITH SECRECY SYSTEM PROJECT

 CALL PREVENTION  AND PARALLEL TELEPHONE WITH SECRECY  SYSTEM PROJECThello  friends  today I am gonna  telling  you  about  some  easy  and valuable  electronics projects for  school and  college  practicalThis circuit provides secrecy when two or more telephones are connected in parallel to a telephone line. The circuit also prevents incoming calls to as well as outgoing...

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7-SEGMENT DISPLAY DICE WITH

         7-SEGMENT DISPLAY DICE WITHhello  friends  today I am gonna  telling  you  about  some  easy  and valuable  electronics projects for  school and  college  practicalA digital dice circuit can be easily realised using an astable oscillator circuit followed by a counter, display driver and a display.  Here we have used a timer NE555 as an astable...

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LCD SCREENS CCFL TESTER PROJECT

       LCD SCREENS CCFL TESTERhello  friends  today I am gonna  telling  you  about  some  easy  and valuable  electronics projects for  school and  college  practicalLiquid crystal displays (LCDs) are used in a wide range of products including flat screen computer monitors, laptop computers, tablet PCs, PDAs, digital cameras, and portable devices. Compact cold...

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HOME APPLIANCE CONTROL USING TV REMOTE

HOME APPLIANCE CONTROL USING TV REMOTE hello  friends  today I am gonna  telling  you  about  some  easy  and valuable  electronics projects for  school and  college  practicalThis circuit is designed to turn on / off any household or industrial appliance using a TV / DVD remote controller. Depending on the remote used, the circuit can be operated up to a distance of 5–10 m.The...

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PULSE RATE METER

                  PULSE RATE METERhello  friends  today I am gonna  telling  you  about  some  easy  and valuable  electronics projects for  school and  college  practical Here is a meter to measure the human heart rate. The pulses are picked up around the wrist (just as it is examined by the doctor) using a condenser microphone fastened...

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DIGITAL VOLT METER PROJECT

  DIGITAL VOLT METER PROJECTShello  friends  today I am gonna  telling  you  about  some  easy  and valuable  electronics projects for  school and  college  practical A voltmeter finds its importance wherever voltage is to be measured.  Here we present an easy  to build and accurate digital voltage meter that has been designed as a panel meter and can be used...

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ANALOG CAPACITANCE METER

       ANALOG CAPACITANCE  METER hello  friends  today I am gonna  telling  you  about  some  easy  and valuable  electronics projects for  school and  college  practical The principle of operation of this meter is based on pulse- width modulation.  Larger the capacitance, higher is the pulse width and vice - versa.  The meter given here...

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BATTERY DEEP DISCHARGE SAVER

     BATTERY DEEP DISCHARGE  SAVER hello  friends  today I am gonna  telling  you  about  some  easy  and valuable  electronics projects for  school and  college  practical This circuit can be used to ensure that a 12V sealed lead acid battery does not go into the condition of deep discharge.  The circuit disconnects the battery from load when...

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VARIVALE TIMER WITH MUSIC PROJECT

 VARIVALE TIMER WITH MUSIC PROJECT hello  friends  today I am gonna  telling  you  about  some  easy  and valuable  electronics projects for  school and  college  practicalThis simple timer can be set to run for different time settings (30 seconds to 4.5 minutes). Also, a musical note is played at the end of the set timing.Timer IC NE555 (IC1) is wired as an astable multivibrator...

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