Bally-Pinball-Clock

Instructions for building an Atmega328 based board that plugs into a Bally 6-digit pinball display that shows the time.

(For a less hardware intensive pinball clock using a Raspberry Pi, scroll to Raspberry Pi Clock below)

Basic parts needed:

• Atmega328 IC and socket (aka Arduino)
• DS1307 RTC module (keeps time when clock is powered off)
• Nixie Tube power supply (optional, supports original plasma displays)
• Small stripboard
• 20 pin .156 female J1 connector and female pins
• 7805 Voltage regulator
• 2 momentary push buttons
• 2 LEDs
• 2 220 Ohm resistors
• 1 10k Ohm resistor
• 2 10 uF capacitors
• 2 22 pF capacitors
• 16 MHz clock crystal
• DC power jack
• 12V/1A plug-in power supply
• misc electronics -- wire/headers/solder

Wiring

High Voltage Power Supply

The HVPS is available here: https://threeneurons.wordpress.com/nixie-power-supply/hv-supply-kit/

DS1307 Real Time Clock Module

Raspberry Pi Clock

A simlified version of the pinball clock uses a Raspberry Pi instead of all the components used above. The only requirements are to make a connector and install software to a Raspberry Pi. If you'd prefer to make the Pi clock, the instructions and programs are located in the Pi folder.