3Pcs C51 4 Bits Electronic Clock Electronic Production Suite DIY Kits

3Pcs C51 4 Bits Electronic Clock Electronic Production Suite DIY Kits. 

Description:

AT89C2051-based of four electronic clock kit. 
Supply voltage: 3V  ~ 6V. 
PCB Size: 52 x 42mm. 

Function:

Seconds correction (for precise School). 
Switch to every minute independent display interface whole point of time (8-20 o'clock chime can be turned off). 
Two alarm settings (you can turn off the alarm function). 

Feature:

0.56 inch special red digital clock for display. 
Import AT89C2051 for master chip. 
1.2mm thick PCB made from military grade FR-4 board. 
Accurate travel time, travel time error range error -1 to +1 seconds every 24 hours. 

Package included:

3 x Electronic Clock DIY Kits. 

Note:

This produce is DIY kits, not the end product! You need to have some electronic knowledge and ability.
We don't supply EN manuals.