DIY Prototype PCB Board Simple Electronic Mini Clock Kit
Description:

Source code: https:\/\/copy.com\/AcQtaERagthDjR2fProduction process: https:\/\/copy.com\/VoeBHuAW9onmY3eZ
Using double-sided fiberglass board， thickness of 1.6mmHours and seconds will automatically switch displayThere is the Chime on every hour and Announce time at half hour function. When Chime on every hour， Up and down of the grid full light flashes to remind you，Buzzer sounding one sceond; When Announce time at half hour， the grid light flashes onec， the buzzer short beeps once. These function period to show distinction of the time. Also you can set to turn off the Buzzer call.
Automatic calibration function:Calibration range is -20 to 20 seconds， Because there is no use clock chip， so we set a calibration function.Calibration needs its own statistical difference in the number of seconds per day， then set the number of seconds plus or minus， In this case the system will automatically subtract the number of seconds per day， so you can make the clock more accurate.
List:
1 x Green LED Digital Tube1 x 3 x 7cm double-sided fiberglass board1 x STC11F02E SCM1 x 20-pin IC socket3 x Miniature Micro Switch1 x 30 ohm exclusion1 x buzzer1 x 12MHZ crystal2 x 30pF capacitance1 x 90 pin 4-pin1 x 9012 transistor1 x 36K resistorSeveral wire
Package included:
1 x DIY Prototype PCB Board Simple Electronic Mini Clock Kit