legolaslee
New Member
Hi guys. I need help with this circuit. I don't understand how does it work. Can anyone explain to me this circuit? Its the ultrasonic transmitter by the way, and IC 3 is 4093. VR4 is used to adjust the frequency to 40 khz.
https://img140.imageshack.us/my.php?image=schtranspk9.jpg
https://img140.imageshack.us/my.php?image=schtranspk9.jpg