cjameson

great project. How long have you been using this in your home?I have read that the DHT22 has an accuracy of ±2°C. It seems to me that this might not be accurate enough to maintain a comfortable temperature in a home. What has been your experience with this?A second thought: In my home the thermostat is located in a central hall rather than a room that people gather in. the result is that the hall is at a "perfect temp" but the family room is not. have you considered adding wireless satellite temp sensors to your build to deal with such situations?

Many different reactions. Most loved it - but a few (mostly younger) kids would not go anywhere near it. I got a few really good scares with it too. I set the sensor so that it would trigger as they got about 1/2 way up the driveway. A few kids (and adults) instinctively ran (bolted) back to the safety of the sidewalk when they triggered it *Evil Grin*

These are great. Does anyone have thoughts on how to make them to move around a bit? maybe with some small servos and a Arduino?

Has anyone tried this with a sugar substitute to make a 'no sugar added' version?

I just watched the video. It looks like you have screwed the holder to the melamine.I wonder if embedding rare earth magnets into the back of the holders and intalling a steel sheet behind the melamine would work? It would be more expensive, but it would provide many more layout options. Just a thought. As it stands this is an excellent instructable - nicely done!

how did you fix all the holders to the melamine? can they be repositioned or replaced if you buy more tools?

Found these on ebay today. I think I may design a fixture to hold 2 of these (one for X/Y & one for Z calibration) on the Y-Axis arm:http://www.ebay.com/itm/5-PCS-650nm-6mm-DC-5V-5mW-...

Nice instructable. I followed you previous one to calibrate my Printrbot Simple 1403 and saw a visible improvement in my prints. I will try this process next time.It might be fun to design and print a laser housing that provides the pin hole and a mount point to glue the magnet into

Great explanation of the calibration process. However I wonder about the accuracy in the measurements. In your examples your measurements found your axis to be off by 0.8mm, 0.2mm and 0.5mm. It seems to me that these values would fall into the measurement error of the tools that you are using? Do you think that the placement of 2 pieces of tape (x & y axis) and then the measurement is accurate within the measured delta of 0.2mm?After adjusting based on these measurements did you see a measurable difference in the quality of your prints? Not trying to be critical here... as I said this is a great instructable. I am just wondering the accuracy expectation should be for this process.

Just want to point out that anytime you generate electricity from a kinetic system you increase the work that you need to do. The question is: how much electrical power do you want/need and how much are you willing to increase the work that YOU add to the system?