hi,
As the cost of a reasonably specified wall plug mains to dc adaptor is so low,
I would recommend you buy one that will satisfy ALL/most of your future projects.
If you are using logic ic's and PIC's, get a regulated +5Volt capable of supplying at least 2Amp.
Its only about 10VA, its a small adaptor.
If you are using logic ic's and PIC's, and you also wish to power say 12Vdc devices, get a regulated +12Volt capable of supplying at least 2Amp and follow this with a 7805, +5V 1A regulator.
Its only about 10VA or 24VA, its a small adaptor and they cost less than £5GBP.
I would advise that you also fit a 2A fuse 'inline' with +Vdc output in order to avoid a similar psu burnup,
as recently experienced by a forum member.