Here is a collection of links especially relevant for Mechatronics.
The American professional society for electrical and IT engineers is highly renowned. On their website you’ll find lots of information, technical links, news etc. Products & parts
A large database of electrical, optical and mechanical components and equipment. Lots of data sheets and technical info.How products are made
Good descriptions of manufacturing steps and processes for various household objects.Matweb
A large database with specifications for 67.000 commercial materials: metals, ceramics, polymers, composites.General information
The official website of Denmark with general information about living and working in Denmark.