4QD = Motor Controllers for Robot Wars etc, the best available

4QD's sister Tech site, if you want circuit diagrams and electronic theory, look no further.

Circuit Exchange International, excellent electronic circuits source!

Electronic Circuits for the Hobbyist

Electronic-Circuits-Diagrams.com

Electronics Hobbyist

FC's Electronic Circuits

Terry Pinnel's Homepage excellent circuits archive!

Farnell based in Leeds, for electronic components online

RS based in Corby and nationwide, for electronic components online

Maplin for electronic components online, or many retail stores nationwide

The Tina-Pro site at Designsoft.com

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