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Frequency : 50/60Hz
Jumper enables the voltage regulator for power supplies
MOSI (Master Output Slave Input)
5 KB used by bootloader) 32 KB (0
Portable gas detector
DS1307 RTC IC (Real Time Clock) 21 key remote Frequency : 50/60HzThe DS1307 serial real time clock (RTC) is a lowpower, full binary coded decimal (BCD) clock calendar plus 56 bytes of NV SRAM. Address and data are transferred serially through an I2C, bidirectional bus. The clock calendar provides seconds, minutes, hours, day, date, month, and year information. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either the