| 摘要 |
PURPOSE: An input/output control unit of a sound generator for the blind is provided to output a walk signal by operating a pedestrian-operated traffic signal control unit by stably supplying power to a sound generator. CONSTITUTION: A control unit(20) controls the output of a power driving unit using a signal input from a traffic signal control unit. A power driving unit(30) converts and outputs a signal input from the control unit to a DC signal. A voltage detecting unit(40) detects voltage from the power driving unit and sends it to the control unit. An input detecting unit(50) converts AC voltage to DC and transfers it to a relay driving unit. The relay driving unit is connected to the input of the traffic signal control unit. |
