FusionITR said:
Nigel Goodwin said:
I would suggest replacing D4 and D5 with a bridge?, a half wave rectifier isn't much good at 50/60Hz - a bridge as two full wave rectifiers is MUCH better.
Do you mean replace both D4 and D5 with a single bridge or a bridge bridge replacing each diode?
I ask this because I need to be able to rectify a negative voltage for the negative voltage regulator (the -5V output). If I replace D4 and D5 with a bridge I wont be able to do this.
You do the same as D2 and D3, that's a full wave rectifier, add two more to give the negative half as well - it's normal to use a bridge to do so.
Sorry, to be mean, but if you don't understand such a simple basic circuit perhaps you shouldn't be looking at vastly more complicated switchmode regulators?.