4-Bits
AT89C2051-based of four electronic clock kit
Kit Model: YSZ-4
Supply voltage: 3V-6V
PCB Size: 52mm * wide 42mm
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)
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.
6-Bits
IT IS KITS ONLY. That is to say, all items are not welded on the pcb board.
buyers have to weld them on the pcb board by themselves.
we gurantee all items on the following listing included.
ONLY for professionals. kits assembled is not a very complex work but
if you are not professional, item maybe get broken.
we cannot offer the warranty for incorrect welding and assembling.
Features:
1.Working voltage:DC6-12V
2.Recommend voltage:DC5V
3.Recommend battery:CR2032 (3V)
4.Working current:35mA
5.Standby current:1.2mA
Package included:
1PCS X 4 bits/6 bits(DIY Kits)
DS3231 AT24C32
1 Size: 38mm (length) * 22mm (W) * 14mm (height)
2 Weight: 8g
3 Operating voltage :3.3 – 5 .5 V
4 clock chip: high-precision clock chip DS3231
5 Clock Accuracy :0-40 ° range, the accuracy 2ppm, the error was about 1 minute
6 calendar alarm clock with two
7 programmable square-wave output
8 Real time clock generator seconds, minutes, hours, day, date, month and year timing and provide valid until the year 2100 leap year compensation
9 chip temperature sensor comes with an accuracy of ± 3 °
10 memory chips: AT24C32 (storage capacity 32K)
11.IIC bus interface, the maximum transmission speed of 400KHz (working voltage of 5V)
12 can be cascaded with other IIC device, 24C32 addresses can be shorted A0/A1/A2 modify default address is 0x57
13 with rechargeable battery LIR2032, to ensure the system after power failure, the clock move any natural normal
14 Packing: single anti-static packaging
Wiring instructions (with For Arduino uno r3 for example):
SCL → A5
SDA → A4
VCC → 5V
GND → GND
Shipping list:
1.DS3231 module a (tested good antistatic packaging )
Note: don’t inclue battery,it only need 0.01 dollars,it’s not safty to ship by air mail.hope you can understanding
(2) an electronic file data (including test procedures for Arduino, PDF format schematics, data sheet)
Package Included: 1 x DS3231 Module
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