dc power converter
DC power converter 12V DC to 120V DC
The most obvious approach would be to make a DC power converter 12V DC to 120V DC, output at 50 or 60 Hz, but this requires a rather large and heavy transformer. So it’s better to use a high frequency, at least 25kHz, so a very small and cheap transformer can be used. But sending 25 kHz into a power supply designed for 50 to 60 Hz is no good! The input diodes are not fast enough, and the noise filter at the input would place a heavy reactive load on the inverter! So I decided to rectify the secondary voltage in the converter, and power the VCR with DC.
oke, thanks
03/01/2012 @ 19:02
http://www.afiata.com/power-supply-control-circuit/
04/01/2012 @ 02:44