Do you have an old broken smartphone lying around the house somewhere? Then why not turn it into a robot? That's exactly what YouTuber Mehdi Sadaghdar did in a recent video, after his efforts to bring a destroyed phone back to life disastrously failed. In one of his trademark videos, electronics expert Sadaghdar tries in vain to repair a phone he broke in a previous video, burning and electrocuting himself mulitple times along the way. Ulimately, he gives up, and decides to cannibalise the device to turn it into a 'robot' for his daughter. Using the phone's vibrator, a coin battery, a simple switch, a few wires and the bristly part of a toothbrush, he manages to make a simple little toy that can skitter around a tabletop as long as the battery lasts. It's not the most revolutionary device in the world, but at least it's more useful than a knackered smartphone.