What Is an HTML Countdown?

Countdown timer is a countdown system composed of single chip microcomputer as the core device. The system display consists of a 7-digit digital nixie tube, which displays the minutes, seconds, and 0.1 seconds of the time value. It can set the countdown time through the keypad array. When the countdown expires, a buzzer sounds an alarm.

Countdown

Countdown timer is a device designed to realize timely alarm based on timing. It consists of three parts: keyboard scanning, dynamic LED display circuit, and alarm to control the timing time. At the same time, the device also uses a level-controlled alarm device to implement a sound prompt when the countdown time is up.

The countdown timer has strong real-time performance and good operability, and can be adjusted accordingly to meet different requirements to suit different environments.

1. It has a timed reminder function and can display the current time.

2. Use the market's No. 7 AR / STOP key to start the countdown. The countdown cannot set the time, and there is no sound reminder function. It can be paused. The longest countdown time: 23 hours, 59 minutes, and 59 seconds.

1. Press the "M" key to set the position specified by "Min";

1. When the timer display is unclear or the sound is weakened, please replace the battery;

2. Use button AG13 battery;

3. Slide open the battery door, take out the old battery, and distinguish the positive and negative electrodes of the battery.