appliance switch kit?

I want to make my own plug-in countdown timer switch using arduino because commercially available ones are not quite what I want. They are either too difficult to set time, have a limited time range, cannot set arbitrary time increment, or don't show remaining time.

The hardware components needed are

  • arduino
  • high current relay (20A 120V)
  • project box
  • display
  • keypad
  • power supply for arduino

Is there a kit that has these components nicely layout so I can focus on the programming?

I dont think you will find a kit with those specific components, but Kits & Projects Products Category on Adafruit Industries has different kits available.. as well as Kits - SparkFun Electronics I mean you can buy the individual parts relatively inexpensive.

If you can wait on delivery ebay will be cheaper options for bulk purchases.. if you want them within a few days.. adafruit, sparkfun are pretty quick on delivery.

Solid State Relay - 40A (3-32V DC Input) - COM-13015 - SparkFun Electronics = 9.95
Membrane 3x4 Matrix Keypad + extras [3x4] : ID 419 : $3.95 : Adafruit Industries, Unique & fun DIY electronics and kits = 3.95
White Enclosure for Arduino - Electronics enclosure [1.0] : ID 271 : $15.00 : Adafruit Industries, Unique & fun DIY electronics and kits = 15.00 (will accept a 2x16 lcd)