| 摘要 |
<p>The device comprises a microcontroller MP organised to receive signals sent by a computer and in order to send it a response. The device is supplied exclusively by the energy of the signals received. To this end, it comprises an appropriate supply circuit. The operating voltage of the microcontroller being lower, circuits are provided to lower the voltage of the entrant signal and raise that of the departing signal. <IMAGE></p> |
