Wow… Great replies! Thank you!!!
Join/connect pin 6 and 7 to ground (the center pin of X1).
Pin 5 and 8 go to the bridge rectifier.
Thanks Leo - but wouldn’t the phasing be off? (90 or 180degrees?) hmm… I should use this as a good oscilloscope lesson; don’t know why I didn’t think of that.
Have you checked the current requirements of your signal generator circuit?
It’s about 150ma max; when I measured it off a bench supply it was about 80ma
The power supply circuit you linked is for 1 A max from each rail yet your transformer is only rated 0.1 A. If your current is less than 0.1 A you could reduce the values of the reservoir capacitors and perhaps use 78Lxx and 79Lxx regulators. If the current is more than 0.1 A you need a better transformer.
Thanks for pointing that out. I misread the page on the transformer. i will double check requirements & swap out parts (caps/regulators/transformer) as needed.
The dots actually show the "start of the windings.
So, if you connect the windings in series (to increase output voltage) the “dot” of one winding should be connected to the “no-dot” of the other. If you want to connect identical voltage windings in parallel (to increase current capability) the “dots” of the two windings are connected together and the “no-dots” are connected together.
You can connect dissimilar windings in series (say 12v and 6v to give 18v) but you must never connect dissimilar windings in parallel as this will effectively short circuit the transformer resulting in its destruction.
Good information! Thank you. I get worried about a/c’s phasing getting in the way, so I didn’t want to ‘try and see’ w/o more information.