I recently got an ultrasonic generator module:
http://www.mcmelectronics.com/product/KEMO-ELECTRONIC-M048N-/28-6404
but I am having trouble finding a high frequency speaker or piezo-tweeter that can match its
Output Frequency: 8kHz ~ 40kHz. Either they do not go down to 8kHz or up to 40kHz...
I know nothing about electronics, but good at finding contacts to overcome my blind spots, and hope to find a few here. I live near Albany, CA. My main obsession at the moment is getting my first home PC, but I've many interests.