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what electronic projects can i do with an old tape recorder parts and a working cell phone? Answered

can i do a battery charger with them ? Can i convert a dc mortor into a powerful dynamo ,if no then please explain me how to make a dynamo easily with easily available parts which can charge a nine volts battery.also tell me how to use a digital multi meter [i.e measuring resisters,diodes,transisters ect]. pls answer me all these questions

Tags:dynamo

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HP psc 2110 all-in-one makebotBest Answer (author)2009-05-21

if the recorder is in one peace you could make a mobile operated tape deck. you could hack the phone so that when it rings the tape recorder plays or starts recording. if it wore to play you could make a looped tape (like in makezines meloman week end project) and have a cool sound maker. good for halloween.

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Kiteman (author)2009-05-20

Old tape recorders are ideal sources for parts for things like head bots and solar rollers.

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vamsi srinivas (author)Kiteman2009-09-10

Thanks for answering my question .Since i am busy i did'nt reply u earlier. Thanking you once again.

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appolo (author)2009-05-22

Various DC motors will give an output voltage as the shaft is rotated. This will depend on the working voltage of the motor and rotation speed. You will need a diode in series with the output current from the motor to the battery, this will prevent the battery discharging back through the motor. The diode is used as a blocking diode and the positive DC output from the motor will connect to the anode of the diode, the cathode will connect to the positive (+) of your battery. The negative side of your motor connects to the negative (-) of the battery. You can purchase 'auto ranging' digital meters which makes readings a lot easier to undertake if your unsure how to set the ranges.

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vamsi srinivas (author)appolo2009-09-10

Thanks for answering my question .Since i am busy i did'nt reply u earlier. Thanking you once again.Please send me what are 'auto ranging' digital meters.

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