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Datasheet (ATMega32U4)
These 20mm 4-digit 7-segment displays are big enough to see from a distance but not so big that you’d have trouble finding an enclosure for them
We also really enjoyed the fact that this unit has a iron holder
Here at SparkFun we use them all the time
SparkFun Real Time Clock Module Breakout Boards, Sparkfun Originals Servos & Parts not other itemsThis is the SparkFun Real Time Clock (RTC) Module, this little breakout that uses the DS1307 to keep track of the current year, month, day as well as the current time. The module comes fully assembled and includes a small CR1225 Lithium coin cell battery that will run the RTC for a minimum of 9 years (17 years typical) without an external 5V power supply. The DS1307 RTC is accessed via the I2C protocol. Weve written a test bed to program the modules,
US$ 50.00
US$ 72465.00
US$ 139.95
