AT89C2051 Digital 4 Bits Electronic Clock Electronic Production Suite DIY Kit
Function:
1. Seconds correction (for precise School)
2. Switch to every minute independent display interface
3. whole point of time (8-20 o\'clock chime can be turned off)
4. Two alarm settings (you can turn off the alarm function)
5. PCB size: 52mm long * 42mm wide
6. Power supply voltage: 3V-5V (Recommended: 5V )
Kit Features:
A. 0.56 inch special red digital clock for display;
B. Import AT89C2051 for master chip;
C.1.2mm thick PCB made from military grade FR-4 board;
D. accurate travel time, travel time error range error -1 to +1 seconds every 24 hours.
setting, LED flashes the last one, the last one by S2 plus one, between 0 and 9 cycles, digital the greater the faster the clock, press S1 to confirm the setting and return to the clock display. Set.
List:
name specification Quantity serial number
0.25w resistance 4.7K 5 R1.R3-R6
Exclusion 470*9 1 R2
electrolytic capacitor 10uf 1 C1
ceramic capacitor 30p 2 C2, C3
104 1 C5
diode IN4007 2 D1, D2
Nixie tube 0.4" 1 DS1
crystal oscillator 12HMz 1 T1
key switch 6*6 2 S1, S2
audion 8550 1 Q1
singlechip AT89C2051 1 V1
socket DIP20 1
buzzer 5V 1 V2
terminal KF126-2P 1 J1
circuit board 1
Note: This kit needs to be soldered by yourself!
Package Included:
1pcs * AT89C2051 Digital 4 Bits Electronic Clock