| 摘要 |
<p>PURPOSE: To prevent computer equipment from freely being operated during a course except by an instructor and increase the concentration effect of a training by composing the controller of an instructor's ON/OFF control box and ON/OFF control circuit boxes of the computer equipment for many trainees. CONSTITUTION: Through the instructor's control box 2, the display power source, display signal input, and keyboard signal input of trainee's computers 9 can be turned on and off individually or at the same time and many computers can be operated by groups. For the purpose, matrix key switches are constituted and used as a switch board. Then a light emission signal which is different with functions is sent and coupled with a batch operation control circuit which turns on and off the display power source, display signal input, and keyboard signal input of the trainee's computers 9 operating on receiving the light emission signal at the same time, thereby turning on and off them. Consequently, centralized control by trainee groups can be performed.</p> |
