The present disclosure is directed to illuminated devices attached to vehicles. The bandgap reference further includes a variable resistor comprising a fixed resistor that may be selectively combined with one or more of a plurality of selectable resistors, wherein the first voltage is inversely proportional to the resistance of the variable resistor. The method also detects a failure condition associated with the uplink and selects a second TTI resource, different than the first TTI resource, in response to detection of the failure condition. The phosphorous diffusion and the boron diffusion are conducted by a face-to-face diffusion method. The split ring is fitted within one of the grooves at a first clearance and fitted within the other of the grooves at a predetermined second clearance at least ten times the first clearance to isolate the outer race from vibrations of the inner race. Impedances of the ground and power lines are greatly increased by the choke coils.