Originally Posted by richarddd
Please explain the difference. Both the new and old have very similar physical appearances and notations, although the new one says "class 2 transformer" and "regulated" while the old is silent on the subjects.
Well, the transformer-based ones are heavier and typically look like this:
http://www.mower-magic.co.uk/acatalog/ac-adaptor_uk.jpg
Switching adaptors are much lighter; here is an example from the RS website:
http://www.radioshack.com/product.as...Fid=273%2D1691