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Buy RTC and RFID Module Online in India | StemVolt
RTC and RFID Modules are essential timing and identification components for embedded systems. From DS3231 RTC clock modules and EM-18 RFID readers to RC522 RFID cards and readers, these are widely used in attendance systems, access control, and time-stamped data logging projects across India. Best price guaranteed with fast delivery.
125kHz & 13.56MHz RFID Keychain Tag
In stock
DS3231 RTC Module Precise Real Time Clock I2C AT24C32
In stock
EM-18 RFID Reader Module 125kHz
In stock
PN532 NFC RFID Reader/Writer Module V3 Kit 13.56MHz
In stock
RC522 RFID Reader/Writer Module with RFID Card and Tag
In stock
Real Time Clock DS1307 RTC I2C Module AT24C32
In stock
RFID IC Card 13.56 MHz
In stock
What are RTC and RFID Modules?
RTC modules are real-time clock circuits that maintain accurate date and time even when the main microcontroller is powered off, using a coin cell battery for backup. RFID modules use radio frequency to read identification data stored on RFID cards or tags without physical contact. A common example in Indian college projects is combining a DS3231 rtc module arduino build with an RC522 RFID reader to create an automatic student attendance system that logs card scan time to an SD card.
Common RTC and RFID Modules Available at StemVolt
- DS3231 RTC Module — High accuracy I2C rtc clock module with temperature sensor and coin cell battery backup
- EM-18 RFID Reader Module 125kHz — UART output RFID reader for reading 125kHz EM4100 compatible rfid cards and key fobs
- RC522 RFID Reader Module 13.56MHz — SPI based RFID module for reading and writing Mifare 13.56MHz cards in access control builds
- DS1307 RTC Module — Basic I2C rtc module price friendly option for time-keeping in data logger and clock builds
- Also explore: Display Modules – OLED, LCD, TFT
- Also explore: IoT and Wireless Modules – ESP, Bluetooth
- Also explore: Relay Modules – 5V, 12V Relay Boards
How to Choose the Right RTC and RFID Module
For timekeeping, DS3231 is more accurate than DS1307 as it has a built-in temperature-compensated crystal that reduces drift to under 2 minutes per year. For RFID, choose frequency based on your card type. EM-18 reads 125kHz EM4100 cards while RC522 reads 13.56MHz Mifare cards. Most college project RFID cards in India are Mifare 13.56MHz so RC522 is the more useful starting choice. One practical tip: always back up your RTC module time setting code in EEPROM so the Arduino restores the correct time automatically after a power loss without needing manual resetting.
Why Buy RTC and RFID Modules from StemVolt
StemVolt is an electronics components store based in Rajasthan, supplying genuine and quality-tested modules across India. The best price is guaranteed with fast shipping.