Nixie UNIVERSAL TUBE CLOCK KIT Assembly Instructions And User's Manual page 27

R17, R18, R19 10kΩ
Q3, Q4, Q5 BC547
LED1-LED6 LED, 3mm
J2 Pin strips
If necessary, RGB LED backlight can be connected to the controller. The controller supports common
anode RGB LEDs and single color LED's (6pcs of blue color LEDs are included).
Connection diagram of RGB LEDs with a common anode:
Connection diagram of single color (blue) LED's:
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10. LED backlight circuit components
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