It 's a very low voltage square wave which is made from 18-0-18 Vac sine wave.But there are some noise at zero crossing.
feed to port0.2 and 0.5 of a microcontroller .
I don't know why it happen,may be 220Vac not pure sine ,
How can I remove the noise or modify this circuit ?
feed to port0.2 and 0.5 of a microcontroller .
I don't know why it happen,may be 220Vac not pure sine ,
How can I remove the noise or modify this circuit ?
Attachments
-
98.8 KB Views: 73