Board Layout - Arduino IN-14 Nixie Operating Instructions Manual

Board layout

For reference, the board layout is as shown (viewed from the top):
The connections are:
Connector
POWER External power should be applied to the board with this connector.
Any DC input source is possible, from 7.5V – 12V. Higher voltages
may be possible, but could cause the digits to flicker if the voltage is
too high, and you might have to provide a heat sink for the the
MOSFET and voltage regulator.
The absolute maximum input voltage is 24V. Any higher voltage
than this will damage the board within a few seconds!
The input VIN is protected against the input being connected
reversed.
The input current ranges from 300mA to 1A depending on the size
of the tubes and the number of LEDs you are driving.
170V: Output of high voltage for driving external neons etc.
GND: The negative side of the input supply
VIN: The positive side of the input supply
VCC: Output of regulated 5V, which can be used to drive auxiliary
circuitry.
FRONT These are the controls that go on the front panel: The input button
and the Light Dependent Resistor to detect ambient light.
GND: The "ground". One lead of the button and one lead of the LDR
and one lead of the button are connected to this.
BTN1: The other lead of the button is connected to this input
DLS: "Dimming LDR Sense": The other lead of the LDR is connected
to this
VCC: Regulated 5V output to drive any LEDs or lighting. Note that
you can also connect the LEDs to the VIN if you want to reduce the
load of the regulator.
RTC / WIFI The connection for the RTC (Real Time Clock) or WiFi time provider
module. Connect this to the appropriately marked terminals on the
RTC / WIFI module.
Description Values