Where can I find a thermostat that plugs in to a wall socket and based on temperature turns an appliance plugged in to it on and off? Here is an online DIY for one of it's uses:

http://www.off-grid.net/2012/10/03/freezer-to-fridge-conversion/

Try http://thailand.rs-online.com/ - they will have it for sure.

Note that the use-case in that link is a bit odd - freezers and fridges already have thermostat control

That article is talkin about using a freezer as a 'frige. Different temperature range. Saves a lot on electricity and much more ideal on a boat. Thermostat is also good for turning on a fan.

If you're looking to buy online I got one of these http://www.ebay.co.uk/itm/Double-Socket-Thermostat-For-Reptile-Snake-Lizard-Incubator-Heat-Lamp-Aquarium-/180891876378?pt=UK_Pet_Supplies_Reptiles_Spiders_Insects&hash=item2a1dfefc1a for an egg incubator. I'm pretty sure I've seen them at Chatuchak market.

Temp range only goes down to 1^oC but it does do heating and cooling modes so would work for a freezer / fridge conversion.

That article is talkin about using a freezer as a 'frige. Different temperature range. Saves a lot on electricity and much more ideal on a boat. Thermostat is also good for turning on a fan.

I seriously doubt a freezer-as-fridge has any real energy saving advantage over a fridge - even with the "the cold don't spill out no more!" argument - you're still chilling a crap load more air than what you would do in a normal fridge (based on pics shown), and it still takes X energy to chill X amount of air to X degrees at X ambient temp. Even more so if comparing to a modern fridge with 3-5 doors where everything is split into smaller compartments..

That article is talkin about using a freezer as a 'frige. Different temperature range. Saves a lot on electricity and much more ideal on a boat. Thermostat is also good for turning on a fan.

I seriously doubt a freezer-as-fridge has any real energy saving advantage over a fridge - even with the "the cold don't spill out no more!" argument - you're still chilling a crap load more air than what you would do in a normal fridge (based on pics shown), and it still takes X energy to chill X amount of air to X degrees at X ambient temp. Even more so if comparing to a modern fridge with 3-5 doors where everything is split into smaller compartments..

I don't limit my needs only to energy savings, but thanks for commenting.