Here's an update on an old post. PM me if you have any questions
I have been using this set up for a couple of years now to control an 1800 watt element on my T500 boiler.
Its easy to build, cheap and effective for this size element and runs cool for hours without a fan despite my best attempts to blow it up.
The watt setting on the plug-in meter gives an easy and reliable measure of the power running through the element. This makes it easy to return to the same setting every time (All things being equal).
Kit:one of these
http://www.ebay.co.uk/itm/AC-220v-3000W ... 3688wt_952This one suits the T500 boiler (1800 watts) Bigger elements require bigger controllers.
one of these
http://www.jaycar.co.nz/Power-Products- ... r/p/MS6115 Male plug
Female plug
(cut a lead or an appliance and save yourself the trouble of wiring it up)
A tough plastic, clip lid lunch box or circuit box
This stuff fractures so take it easy.
Mount the controller through the centre of the lid
Drill a hole either side for the male and female leads to go through
Pass the leads through the holes, strip the ends ready for wiring and then tie a single granny knot in the flex to prevent the lead passing back through the hole.
Wire up the controller as per the instructions (2 terminals closest to the top are the output)
At the top end of the dial a small movement produces a big reduction in power while at the bottom end a lot of movement produces very little change.
Happy stilling
