How To Make A Nixie Clock

This stop motion film illustrates how I made a 4-digit Nixie Clock Tubes: Mullard ZM1080, about 1970 Microprocessor: PIC 16F877 Clock: 32.768 kHz Drivers: K155ID0, similar to TTL SN74141 device Software: C code, uses 98% of the 8k word memory in the 16F877 HT supply is a switched mode design using a BUZ73 FET published by LEDSales - "Build a Nixie Power Supply" Wiring: VERO strip board for the HT supply and point-to-point Kynar wire wrap for the controller board and tubes User input: three buttons - SET, UP and DOWN Audio output: piezo sounder for tick and "chimes" Light display: 4 Orange LEDs mounted below the tubes. Either 12- or 24-hour display can be selected on powerup Tube mounts are turned from box wood and Perspex The enclosure is teak milled from a piece of school lab bench The lid is made from glass using the copper foil method This clock was made for my sister, Astra, in Garlieston Scotland