Introduction - If you have any usage issues, please Google them yourself
The digital contest Responder is mainly composed of 74 series integrated circuits. In addition to the basic function of the emergency response, the emergency response device can realize the multiple functions related to the emergency response, such as timing, alarm, identification of the emergency response signal and the first emergency response lock. In the initial state, the host holds the reset keys of the whole emergency response circuit. At the beginning of the emergency response, the host resets the circuit first, and then presses the start key to enter the 30s routine emergency response. If the responder presses the button before pressing the start key, the circuit will give an alarm (the LED light of the corresponding group will be on), and the circuit will automatically buckle the 1 of the group in advance emergency response 0 points.