Foto related
Glued lens – disassembling-assembling link
Norland optical adhesive NOA 61
classical repairs kyphoto
Infrared photo IR-PHOTO.NET
Flash tubes –
https://www.xenonflashtubes.com/
http://rutubes.com/
http://donklipstein.com/donflash.html
GREAT camera and lens infos: https://learncamerarepair.com/index.php
Other
PDF editing
A VERY good, and useful software, for less money than the Adobe Acrobat: www.pdfsam.org I am absolutelly satisfied with it!
Electronics
Resistor calculator – serial/parallel
Ismerkedés a PIC18 mikrovezérlőkkel
http://esca.atomki.hu/PICula/index.html
DIGITAL CANON repair blog 
I have a EF 400mm f/4 DO L mk II lens that the stabilizer is noisier than usual, also stops focusing and metering exposure when the noise happens and sounds as if something dropped insight. Is there somewhere I can buy the stabilizer from? I replaced one once on an EF 70-200 f4 L IS.
http://Www.procamerarepair.com (USA)?
Thank you, I just contacted them, and they seem to be going out of business, this was their reply:
“We are unfortunately phasing out parts and repairs. We recommend contacting either George’s Camera or Kurt’s Camera for possible repairs.
Sincerely,
Pro Camera Repair, Inc.”
i had little crack on home button flex cable it is iphone 6
is it possible fix flex cable with same chips and home button