Use DS3231SN precision clock chip, built 32.768 crystal. The pull-up resistor R1 R2 own welding on the I2C bus. Am 04.05.17 hat der Verkäufer die folgenden Angaben hinzugefügt hope you could understand.
eBay
Notice: 1. ◆If there are no special circumstances, your product will not be delayed in arrival.
eBay
All pictures are for illustration purpose only and Colours may vary slightly. Import Duties.
eBay
Notice: 1. ◆If there are no special circumstances, your product will not be delayed in arrival.
eBay
This temperature sensor accuracy is ± 3. If the main power failure, the device can continue to provide accurate timing and temperature, performance is not affected. Clock chip: high-precision clock chip DS3231.
eBay
The accuracy of this temperature sensor is ± 3 ° C. Clock chip: high-precision clock chip DS3231. The working format of the clock can be 24-hour or 12 hour format with/AM/PM indication. Provide two adjustable calendar alarms and one adjustable square wave output.
eBay
Wir werden Ihnen so schnell wie möglich antworten. ◆Wenn keine besonderen Umstände vorliegen, kommt es bei der Ankunft Ihres Produkts nicht zu Verzögerungen. Wenn ja, werden wir uns zeitnah mit Ihnen in Verbindung setzen.
eBay
◆If there are no special circumstances, your product will not be delayed in arrival.
eBay