|DS3231-based Real Time Clock & Calendar module with mounting hardware and rechargeable cell|
A DS3231-based RTCC module with onboard I²C pull-up resistors and pin header interface. Included in the pack are two 10mm M2 Nylon tapped spacers and four 6mm M2 Nylon machine screws for mounting plus an LIR2032 rechargeable Lithium-ion cell, already installed.
Note 1: if changing the cell to a non-rechargeable type, you MUST remove the SMD diode to prevent the battery from being charged. See the Super Clock article in the July 2016 issue for more details.
Note 2: as this module has onboard pull-up resistors for the I²C bus, you may need to remove them, or avoid fitting pull-up resistors on the master, for it to share a bus with other peripherals.