Im having difficulty finding a suitable circuit for my project. I want to (cheaply) create a 1Hz sine wave. I want to power it via 9v battery. I need this for a water activated stimulus. Two electrodes, placed in salt water, completes the circuit and is at a 1Hz freq. I have a few lm324's laying around and thought i could use them. Im just having trouble finding a perfect circuit for this, and I'm interested in any suggestions. Thank you.