6-digit AT89C2051 based Digital Electronic Clock DIY Kit

This kit uses three, two digit seven segment displays to display the hours, minutes and seconds of time respectively, and uses two small LEDs to replace colons for interval. The use of single-chip microcomputer programming control display, the use of timer timing, high accuracy, can be adjusted by a button time, also with memory battery, the main power off time is still going (nixie tube does not show). It is practical.

Product Parameter

• Power supply voltage: DC 5 -- 12V (above 7V, the middle four LED will be on)
• Recommended voltage: DC 9V
• Working current: 35mA (external power supply, self provided)
• Standby current: 1.2 MA (powered by standby battery)
• Backup battery: CR2032 (3V)
• Plate size: 90mm * 65mm

Product Instructions

• S1 button is used to set the time. Press and hold for more than 2 seconds to enter the adjust time state and exit. Quick press is used to adjust the time value.
• With the included 3V button cell, clock will retain time settings and keep the clock running except for the display when main power is not available