Mad Of Electronics

Here u can find some useful tips and links related to troubleshooting electronic appliances

VIRTUAL KEYBOARD PIANO --- ONLINE

Posted by rajascientist Saturday, January 30, 2010 0 comments

 
                  Hi  music lovers, beginners . Here is an  opportunity to learn piano ,flute,guitar etc  all at one place.
Follow the link given  VIRTUAL KEYBOARD PIANO  and enjoy  playing piano .


              Very simple yet effective software , for you to learn and enjoy.

Emergency Lamp Starting Problerm --- Faulty D882 Transistor

Posted by rajascientist Wednesday, January 27, 2010 2 comments

                                                 Emergency 6v Battery  Fluorescent Lamp

                        This is the most common problem experienced  by  emergency  lamp. http://detail.en.china.cn/provide/detail,1075042340.html   whether single or double bulb. When connected to power green light will glow ,but when operated from battery lamp will not glow also the red light.


                                

                                        
                       While charging  we can test the battery by pressing  the test button , but in this case  if u press that button you will end up burning  10E resistor near the push button.



                        To conclude in short the main cause for this problem is faulty  D882 NPN  transistor  , replace both the transistor  , now switch on the lamp after charging the battery  , it will be fine.

                         In case of transformerless power supply you may find  only one D882 transistor.
  
         

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