Open Theremin with VarioCaps
To my surprise I got a theremin shield in my mail that looks just like the ones I know, just slightly different. Uwe Kutschki from Thüringen redesigned an Open.Theremin.UNO with variable capacitance diode to facilitate the initial tuning. A digital to analogue converter controlled by the arduino replaces the manual tuning. As this would be a great addition I am definitely looking into his prototype and will try to implement this in a future update. More on it in the Tweaks section.