Sample of 5VDC-9VAC Convertor
  • Example of using a 555 and a couple of transistors to make a 5V DC to 9VAC 1A convertor.
     
  • This is an example, I have not tested or done the second level of math verification.
     
  • Other comments would be to bypass the Voltage at the center tap on the primary side and possibly diode protect, and the 555 and 2N3904 could be replaced by a CD4049 wired as an astable multivibrator using an inverter stage to create inverted drives for the transistors.
     
  • The TIP120 Darlingtons are good for lots of gain and handle 5A, regular Bipolar Transistors could be used by looking at specifications.
     
  • Fuses, indicator lights, fire exstinguishers are all oprional and may be needed.

 

Example Transformers: NOTE these have not been fully qualified and would need to be checked for saturation, final volate generated, etc.



Hammond Mfg #166J33


33VAC CT


33VA


1A Secondary


Digikey#

HM563-ND

 


Mouser #

546-166J33


 

 


$22.92


Hammond Mfg #166K35


35VAC CT


52.5VA


1.5A Secondary


Digikey#

HM564-ND

 


Mouser #

546-166K35


 

 


$30.54


Hammond Mfg #166J36


36VAC CT


36VA


1A Secondary


Digikey#

HM567-ND

 


Mouser #

546-166J36


 

 


$24.26


 


 


 


 


 


 


 


 

9VAC-Example3.PNG

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