RFID Electronic Lock with Relay

The system offers two security modes, selected with a jumper. The first lets you store and delete RFID tags directly, that is without a control tag. The second allows tags to be stored and removed only after the Master card previously stored in the system has been checked.

The relay gives you the complete changeover contact set: common (C), normally open (NO) and normally closed (NC), for maximum flexibility. The contacts can be used, for example, to close the supply line of an electric door lock or to release a turnstile. The relay output works in monostable mode only, with a 1 second activation.

The circuit or device being controlled must work on DC or AC voltage up to 230V AC, drawing no more than 3 amperes. The relay and its drive circuit run on 5V DC, taken from the 5V pin of the Nano board. That voltage comes from the internal regulator of the Nano, which is fed through the Vin pin.

Two LEDs, one red and one green, show the operating state of the circuit and help during programming and during tag reading in normal use as an electronic lock.

The Nano board is supplied already programmed.

The kit is supplied with assembly instructions. Soldering required.

• RFID module: fully managed by the Nano, includes:
  • MISO line: for receiving data from the RFID module.
  • MOSI line: for driving the RFID module and generating the electromagnetic field.
• Security modes: 2
  • Simple: no authorisation is needed to manage the tags.
  • High: tags can be stored and deleted only after a Master card has been presented
• Relay:
  • Contacts: common (C), normally open (NO), normally closed (NC)
• LED indication:
  • Green LED: information during tag programming and reading

• Staff-only access in a company: access management for employees and authorised staff.
• Access for club members: entry control for members of clubs and associations.
• Access to swimming pools and gyms: monitoring and managing entry to sports and leisure facilities.
• Control of the gate at home: security and automation for access to your own home.