Browse over 10,000 Electronics Projects

Adjustable HV Power Supply for Stompbox

Adjustable HV Power Supply for Stompbox

This SMPS can be powered with low input voltage, from 5 VDC to 15 VDC and provided adjustable Output Voltage: + 92 Vdc to +340 Vdc.

Can be used too, as power supply, for the Xenon Lamp, Nixie tube Clock, VFD display, Magic Eye, Neon, and too many others electronics circuits who need HV power supply to work. Is great to use with many models of Nixie tube. It can drive 6 Nixie tubes, in multiplex mode, from 180 to 200V. Powered with low voltage from 5VDC to 15 VDC. With this SMPS you can power 250V @ current of 7.5mA! *In all case above, important note, DC and AC filters must be improved, if is desired reducing present HF frequency noises at output! Another fact, informed before, the RF energy is irradiated as magnetic and electric field, shielded assembly could be necessary!


  • Input + 5 Vdc to +15 Vdc maximum! 0.5A Max. ( Be sure, do not input power overload ).
  • Workable Output Voltage: + 92 Vdc to +340 Vdc .
  • Power Input Max.: 7.5W
  • Working frequency: 45KHz +/- 15kHz ( varies in function of the load, input and output voltage ).
  • No audible noise.
  • Weight: 40g
  • Dimensions ( W x D x H ): 70 x 50 x 20 mm.


Fun with this DIY, to assemble this simple Switch Mode Power Supply (SMPS).
After assembled, this module of the SMPS can be used as power supply, for battery powered portable tube radios, and amplifiers. Is great to use with subminiature tubes, CK 5072, 5744, 5718, 6112, and other devices who need high DC voltage. This SMPS is based on the classical NE555!