5pcs rtc

5Pcs I2C RTC DS1307 AT24C32 Real Time Clock Module For AVR ARM PIC SMD Description: 24C32 32K I2C EEPROM memory Using LIR2032 rechargeable lithium battery with charging circuit Solve the problem of no literacy of the DS1307 with backup battery Support timing 1 year of the DS1307 after fully charged Leads to the DS1307 clock pin provides a clock signal for the microcontroller Other I2C devices can be cascaded Size: 27 x 28 x 8.4mm Note: Because of shipping restrictions, we won't ship battery Package included: 5 x DS1307 module (battery is not included)

Buy 5pcs PCF8523 RTC Module Digital Board PCF8523 Real Time Clock RTC 3.3V 5V for R1,222.77

Description: With this Data Log Shield for WiFi D1 Mini board, can saving data to files on any FAT16 or FAT32 formatted MicroSD card. The included RTC (Real Time Clock) can be used to timestamp all your data with the current time, so that you know precisely what happened when. SD card interface works with FAT16 or FAT32 formatted cards. Real time clock (RTC) keeps the time going even when the power disconnected. The coin cell battery backup last date and time. RTC protected from wrong connecting of battery. Pinout: RTC: D1 - SCL D2 - SDA CD card: D5 - CLK D6 - DO D7 - DI D8 - CS Package included: 5 x DataLog Shield 10 x Male Pin Header 10 x Female Pin Header 10 x Stackable Header

PINOUT: http://img.banggood.com/file/products/20171226001032PINOUT-RTCDS1307.pdf Schematic: http://img.banggood.com/file/products/20171226001140Schematic-RTCDS1307.pdf Feature: Type: Logic ICs Package includes: 5 x RTC DS1307 (real time clock) + battery 5 x Wemos D1 mini shield 10 x Male Pin Header 8pins 10 x Female Pin Header -BLACK 8pins 10 x Stackable Header - BLACK 8pins

Feature:   This is a real time clock (RTC) based on IC DS1307 that allows your microcontroller project to keep track of time even if it is reprogrammed, or if the power is lost.  Use for data-logging, clock, timers and alarms.  The DS1307 can be easily connected to the Arduino, with I2C bus interface.   Package includes:   5 x Real Time Clock Module with battery

Features: 1. Black plate-making process, beautiful, high-quality 2. Configure the STM32 chip, LQFP48 package, 72M frequency, 64K-FLASH, 20K-RAM 3. With power indicator, onboard programmable LED lights 4. The board has 8M crystal, ST recommended brand RTC Crystal 5. Standard 20P-JTAG / SWD interface that used for a variety of common emulator 6. The board has 24C04- data parameter memory for easy application development, data access parameters 7. All GPIO independent leads, pin can be up and down welding, soldering default down 8. Size: 41.7 x 53.9 mm Package included: 5 x Stm32f103c8t6 development board