Hello gauravkothari23,
How are you powering your relay/s? Via your rectified outputs: Pins 1 and 3 of JP1?
so my problem is when one bridge rectifier gets activated, i get the DC voltage at other rectifier also....
Depending on the rated voltage of the relay, and you're supplying it with the rectified output, there is a possibility that
the relay is chattering. i.e. continually switching between the two rectifiers.
It might be best if you use two relays, one to switch the active and the other the neutral lines. This will ensure the two
circuits remain isolated from each other.
Also, what type of circuit are you using for the switching the relay/s? As by my calculations, you should be getting
around 10 volts output to J1. If you're trying to use a 12 volt relay, then chatter will likely occur.
If you are powering the relay/s with the outputs, then you need to use a 5 or 6 volt rated relay with a dropping resistor
to suit.
Lastly, I hope you realize that you're working with a circuit at mains potential and can be extremely dangerous.
You also need to make sure you use X-rated capacitors of at least 400WV on the AC input and the two 470k resistors
rated at least 1 watt each.
Regards,
Relayer
- - - Updated - - -
P.S. I meant to mention also that what voltage you could be reading in the turned off rectifier circuit when being switched
could be due to the 22uF capacitor discharging...
Try measuring the off circuit after 20 seconds or so.
Regards,
Relayer