No IC & DC to DC converter

출처 : http://www.instructables.com/id/Simplest-Ever-DC-DC-Boost-12v-to-73v/

 

 

 

 

A simple DC-DC boost converter:
- 12-18v in = ~73v+ out
- Uses only 2 transistors, no IC's
- Can be made out of one CFL light bulb
- Uses fully discreet components
- 17.2kHz switching frequency