Soon I'll have build instructions and a formal component list available for the active healing unit. Here's a preliminary and general list:

• The first component is a LigthBlue Bean. This allows the device to be controlled from the CastMinder app via Bluetooth
• A 9v battery is used to power the whole system
• A step-down voltage converter is used to provide the Bean with a nice steady 3v (no CR2032 needed!)
• A step-up voltage converter is used to provide power to the electrodes.
• Rather than controlling the input to the step-up converter, I'm using a power MOSFET to control the output. This way I don't need to worry about charging and draining the capacitors in the step-up converter which can mess with the frequency of the output