Make your own remote control

(for Canon EOS Elan IIE / EOS 50E)

• Why make your own instead of buying Canon's?
  
  
• A list of what you need (including costs)
  
  
• Theory of operation
  
  
• How to make the remote control
  
  
• How to use the remote control
  
  
• A word about Canon's RC-1 remote control
  
  
• Other people's solutions