NixieNeon Clock Documentation The circuit descriptions as well as how you build and use the clock can be found here in the user manual Schematics: Schematic 1 – Power Supply Schematic 2 – CPU Schematic 3 – 60hz Ring Counter Schematic 4 – 6hz Ring Counter Schematic 5 – 1 Sec. Ring Counter Schematic 6 – 10 Sec. Ring Counter Schematic 7 – 1 Min. Ring Counter Schematic 8 – 10 Min. Ring Counter Schematic 8 – 1 Hour Ring Counter