When a personal computer fails in transmission of print direction to a printer or interactive communications, the following process is carried out. This is possible, for example, by incorporating a bevel. The controller employs zero voltage in the second leg to reduce the switching loss. The autonomous and universal remote control scheme utilizes the GRC to sense the type of the at least one controlled target automatically, and then to download the context of controlled target dynamically, thereby autonomously controlling the controlled targets of various types with one single GRC. The plumb bob bracket includes a first leg, a second leg attached to the first leg at an angle, a plumb bob attached to the plumb bob bracket by a string, wherein the first leg comprises a first flat panel and a second flat plat panel attached to the first flat panel at a right angle, and a bar member attached to the first flat panel at one end and the third flat panel at a second end.