5889137F76D7D97Cd3D626F1.MediumIan’s new Instructable looks great for Nixie tube hackers, but be careful this one requires a lot of care. He writes “This SMPS boosts low voltage (5-20 volts) to the high voltage needed to drive nixie tubes (170-200 volts). Be warned: even though this small circuit can be operated on batteries/low voltage wall-worts, the output is more than enough to kill you!” Link.