- Joined
- Jan 22, 2008
- Messages
- 52,442
- Helped
- 14,754
- Reputation
- 29,790
- Reaction score
- 14,108
- Trophy points
- 1,393
- Location
- Bochum, Germany
- Activity points
- 298,200
For a boost converter with negative output voltage, you need to change the polarity of the flyback circuit, NPN -> PNP switch.