Doubts regarding transformer connection

[Kick]

Hiii guys,

Now I am working on Energy meter project. So in that project I need to measure Voltage and current. Voltage measurement circuit is shown below,what I did is used a step-down transformer(230V to 9V) and secondary of transformer connected to CH1 of microcontroller (PIC18F87J72 CH1 is using for voltage measurement) through a rectifier and voltage divider circuit. Same transformer is using for Power supply,connected to bridge rectifier and regulators. Is it a good idea or should I add one more transformer ?????

 

[chris.mourad]

Hi

I would suggest to use another secondary winding to connect to your rectifier circuit.

 

[Kick]

another secondary winding??? or another transformer???

 

[chris.mourad]

If you have an available secondary winding on your current transformer, reuse this one.

otherwise another transformer if you have space in your design

 

[Kick]

Not yet started the design,So I can add 1 more transformer. The problem is still I am searching for small size,thru-hole transformer. Found some good products in Digikey,Mouser etc....but all are non-stock. :thumbsdown: