• Robot electronics, Using the I2C bus.
• Electroniq.net, Free electronics projects and circuit diagrams.
• http://circuitlab.com, Circuit simulation and schematics.
• Sam's Gadget FAQ, Salvaging interesting gadgets, components, and subsystems.

• RepRap Wallace.

• large format camera.
• linear camera TSL1401.
• X-ray linear CCD.
• Hackaday cameras.
• OpenMV.
• iPad LCD.
• Arduino driven servo with CHDK for aerial panoramas.

• Biomech H-Bridge with brake.
• Low logic voltage, high motor voltage H-Bridge with brake.

• https://www.electronicspoint.com/resources/logos-for-electronic-component-manufacturers.47/
• http://how-to.wikia.com/wiki/Howto_identify_integrated_circuit_%28chip%29_manufacturers_by_their_logos/all_logos
• http://www.embeddedlinks.com/chipdir/index.htm
• http://www.angelfire.com/electronic2/rch/logotips.html
• http://www.dobbertin-elektronik.de/programm/logos/logos.htm
• http://www.embeddedlinks.com/chipdir/c/logo.htm
• http://info.electronicwerkstatt.de/bereiche/bauteile/ic_logo/

• Many manuals and discussion forum
• http://www.jordansmanuals.com
• ftp://ftp.panasonic.com/pub/panasonic/
• https://www.download-service-manuals.com/en/searchresult.php
• http://master-of-repair.blogspot.com/p/hp.html
• Brother fax service manuals
• http://manualzz.com
• Index to HP service manuals
• Some Brother, Fujitsu, HP, Lexmark, Samsung service manuals.
• Service manuals, schematics, documentation, programs, electronics, hobby
• Service manuals and other
• Printer service manuals

• 1374 Datasheets & manuals
• Manuals on es.co.th
• Manuals on rct.ru
• HP printer service manuals

• Eprom programmer
• de.sci.electronics-FAQ V3.28
• Sci-spot mechanical projects
• Sci-spot electronic projects
• Sci-spot chemical projects
• Hairy geek projects
• Neon bulbs, lots of info.
  • Neon-Lamp-Tea-Light
• temp

If any referenced page no longer exists, try looking for its URL on http://archive.org.