This week we will pair an old smartphone with internet wizardry to make a motion-activated camera that posts pictures to social media. That will let the birds in your garden tweet as many selfies ...

you could easily link your PIR sensor to a microprocessor, using the set-up to track household activity, create your own alarm system, program a smart assistant to greet you when you arrive home ...

A smart thermostat manages your home’s temperature automatically, but there’s another interesting way to use it: as a motion detector. You just need a little help from IFTTT. How-to Geek walks ...