Im building a driver (see attached) for a water atomiser whose resonant frequency is 1.67MHz (standard for this part afaik).
The problem is that the user wants to fire a laser through the atomiser at the water that its humidifying, but in drilling the 5mm hole for the laser i have altered the resonant frequency of the ceramic, so the driver circuit no longer works on it.
I have done a frequency sweep on the atomiser with the hole and have found that its resonant frequency (highest atainable peak-to-peak voltage on the oscilloscope reading) is now in the region of 1.56MHz.
Im a bit confused as to which are the resonant components in the circuit however, so im struggling to match this new frequency. I was under the impression that L1 and C6 in the diagram are the tuned part, so i set about finding new values which would both maintain a matched impedance value for L and C, and combine to create the new desired 1.56MHz.
Using an I chose the new values:
L = 2.2uH
C = 4.7nF
These new values dont seem to work in the circuit however, so im a bit stuck. Can anybody give me any pointers?
TIA
The problem is that the user wants to fire a laser through the atomiser at the water that its humidifying, but in drilling the 5mm hole for the laser i have altered the resonant frequency of the ceramic, so the driver circuit no longer works on it.
I have done a frequency sweep on the atomiser with the hole and have found that its resonant frequency (highest atainable peak-to-peak voltage on the oscilloscope reading) is now in the region of 1.56MHz.
Im a bit confused as to which are the resonant components in the circuit however, so im struggling to match this new frequency. I was under the impression that L1 and C6 in the diagram are the tuned part, so i set about finding new values which would both maintain a matched impedance value for L and C, and combine to create the new desired 1.56MHz.
Using an I chose the new values:
L = 2.2uH
C = 4.7nF
These new values dont seem to work in the circuit however, so im a bit stuck. Can anybody give me any pointers?
TIA