Hello guys... I bought this ultrasonic transducer 60W 40KHz from ebay..
http://www.ebay.com/itm/High-Effici...340024?hash=item5d4d453638:g:ZxoAAOSwPcVVjkKW
and using this schematic i connected him
http://electricstuff.co.uk/levit.html
But from some reason when everything is connected transducer wont work...
Except i change the capacitor... Now I am using the 1nF capacitor as from scheme and I got the resonant requency of 39-40KHz, but if I put the 2 or 4nF capacitor the transducer start to produce some squeaky noises. I use the laptop charger as a PSU.
Why is that so? Could it be transformer or? Maybe transformer can't handle this frequency?
I hope someone of you will help me..
http://www.ebay.com/itm/High-Effici...340024?hash=item5d4d453638:g:ZxoAAOSwPcVVjkKW
and using this schematic i connected him
http://electricstuff.co.uk/levit.html
But from some reason when everything is connected transducer wont work...
Except i change the capacitor... Now I am using the 1nF capacitor as from scheme and I got the resonant requency of 39-40KHz, but if I put the 2 or 4nF capacitor the transducer start to produce some squeaky noises. I use the laptop charger as a PSU.
Why is that so? Could it be transformer or? Maybe transformer can't handle this frequency?
I hope someone of you will help me..