$49.95?? How about less than $5! Go to your local Goodwill/HFH/Salv Army center; they have gobs of wall-warts with various ratings, and nowadays, most of them are switchers, not just simple transformers....Volteq or Mastech has one at $49.95 that can put out 0-15V and 0-3A, the model is HY1503D I believe.
No- they're fixed voltage. But they are regulated, and for something like your project, you can just pickup a 6-volt unit. Very common.wow, never thought about that. I will check it out next time. are these regulated adjustable output power supplies you got?
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