15-12-2016, 09:12 PM
(15-12-2016, 08:30 PM)ppppenguin Wrote: The attachment is from another design I did that went into production. The 22R resistor was necessary and got quite hot.
Presumably the -5V rail was quite lightly loaded in that case? Might've been better to use a lower AC voltage suitable to the +5V load and a 2-diode/2-capacitor circuit to get the -5V? Done that a few times...
Yes, changing to negative regulators would be more elegant.







