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Circuit Exchange
Site created by Andy Collinson. Contains schematics in different categories. Also contains some electronics theory.
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Circuits Online
Schematics, IC database, forum, etc. In Dutch.
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Cybercircuit
A program with 100 schematics for $19USD.
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Elektronik Kompendium
In German
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Electro Tech Projects Forum
A forum where people share schematics.
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Elektronica.startkabel.nl
Schematics, projects and a forum. In Dutch.
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Elektronicaclub van het Meander
In Dutch.
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Hobbyprojecten.nl
In Dutch.
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Knolles Elektronik Page
In German.
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PIC Basic Projects
In English and Dutch.
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Ronald's electronic project site
Primarily PIC projects, Nixie and other exotic tubes and clocks.
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Schakelingen Online
Schematics, course, forum, etc. In Dutch.
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Schematheek
Schematics, forum, datasheets, etc. In Dutch.
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Sonelec-Musique
Audio schematics. In French.
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www.circuit-diagrams.com
Free collection of simple circuit diagrams.