Here is a diagram showing the construction safety device, and the steps to use it. Pre-requisite: Place the arm at a resting position for maximum accuracy. Test 1: Sensing Involuntary movement by placing the smartphone on the palm of the hand. Test 2: Sensing Involuntary movement by placing the smartphone on the dorsal side of the hand. Learn more details from this diagram, or try to make yours with ease now. Learn more details from this diagram, or try to make yours with ease now.
