16-button membrane keyboard with interface component for microcontroller projects.
Tiny and lightweight with high output power.
RFID Reader/Writer, NFC module, MFRC522.
This dual function module uses the extremely accurate ( error value of 1-2 ppm ) DS3231 clock chip with a 2kb memory module ( with 8 address options ) and has a CR-1220 battery back-up included.
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