Brand letter dejia electronic; t91 4 digit electronic clock single pc digital clock four digit clock diy kit
Four electronic clock kit based on at89c2051
Power supply voltage: 3v - 5v recommendation: 5v travel time is more accurate
Pcb size: 52mm x wide 42mm
Function: 1.Second correction (for precise correction)
- switchable to second independent display interface
- full-time check-in (8-20 full-time check-out for 3 seconds)
- two way alarm clock set (can turn off alarm clock function)
Kit features: a.Use 2cm clock dedicated red digital tube for display;
B.Import at 89 c2051 as the main control chip;
C.1.2mm thick pcb made of military grade fr-4 sheet;
D.Precise time, time error range is 24 hours error - 1~+ 1 second.