Three-person responder project description:
The schematic diagram of the three-person responder:
Button function description:
S2(SET) is the start button for rush answer;
S3(OK), S4(+), S5(-) are the No. 1, No. 2, No. 3 rush-response buttons.
LED Status Indicator Description:
The LED light corresponding to P10 is the answering start indicator;
The LED light corresponding to P11 is the rush answering end indicator or the rush answering prohibition indicator;
P12, P13, and P14 are respectively No. 1, No. 2 and No. 3 successful answering indicators.
The LED indication function of the countdown of the answering time uses the corresponding LED lights of P15, P16 and P17.
Countdown job description:
The quick answer time is 30s. When the quick answer start button is pressed, the timing starts and the corresponding LED lights of P15, P16, and P17 light up. When there is 20S remaining in the answering time, the LED corresponding to P15 will be off. When there is 10S remaining in the answering time, the LED corresponding to P16 will be off. When there is 0S remaining in the answering time, the LED corresponding to P17 will be off. At the same time, the buzzer will beep overtime and the beeping time will be 2s.
(1) When the system is powered on, the P11 indicator is on, all other indicators are off, and the quick answer is prohibited, all the quick answer keys are invalid, and the corresponding quick answer success indicator will not light up.
(2) When the rush answering start button of S2 is pressed, the LED connected to P10 is on, the LED connected to P11 is off, the countdown indicators corresponding to P15, P16, and P17 are on, and the rush answering starts. At the same time, timer 0 starts timing 30S, 30S timing time If there is no one to answer, the answer is over, P11 lights up and the buzzer sounds for about 2 seconds (implemented by timer 1), and then the buzzer stops beeping.
(3) When the quick answer starts, press any button of S3, S4, S5, and the quick answer is successful, the corresponding LED lights up, and the buzzer sounds for about 2 seconds and then stops. At the same time, P11 lights up and P10 goes out. Finish.
(4) If any one of the three answers is successful, the others cannot continue to answer, and the answer is invalid. Only when the S2 start button is pressed again, the next round of answer can be performed.
Reviewing Editor: Liu Qing