Products: 4 Digit RTC Nixie Clock Controller

2 Digit Controller

Available here : $39.99

  • I2C control for seconds output
  • Arduino compatible code(available here)
  • Onboard MCP7940N Real Time Clock with battery backup
  • Controls 4 nixies with decimal point and 4 extra outputs available
  • Set time with buttons or load Unix time code via serial
  • 48 300V rated open collector transistor drives

Getting Started

  1. Power Supply & Calculating Current Limit Resistors
    • Power supply should provide enough current and a voltage in excess of the striking voltage of the nixie you've selected
    • Current Limit Resistors(R66-69) = (PSU Voltage - Sustain Voltage)/Current
  2. Setting Time
    • Minutes Up/Down: I/O 4 & I/O 3
    • Hours Up/Down: I/O 2 & I/O 1
    • 24hr/12hr switch: Bit 3
    • Send "T" then the unix timecode with a newline character through serial port(9600baud)
  3. Slave controller for seconds
    • Can control my 2 digit controller (available here)
    • Remove all address jumpers on 2 digit controller and connect I2C lines together

Connections

Connections