Introduction - If you have any usage issues, please Google them yourself
LED blinking cycle, cycle 1s, how this cycle is to be paid? For instance, we need to make the LED light 0.5s out 0.5s, then the cycle is 1Hz. I used on board crystal oscillator is 50MHz, which is 50,000,000 times that of 1Hz. Then we count on the use of counters. Such as dollars to 50 million/2 when the output state for the anti-, then turn out the lights changed, and also changed out the lights bright.