Introduction - If you have any usage issues, please Google them yourself
Using VHDL language design four people to participate in the quiz answer in the timer. When a participant Press First Responder switch in response to lights and accompanied by sound Responder longer accept other input signal. The circuit has a time control function answered questions. Asked to respond to the problem in less than 100s (for 0-99), time countdown. When the time limit is reached, the audible warning to show.