Combination WiFi + Bluetooth 4.0 USB Adapter Brand_PiFace RFID Access Control example

RFID Access Control example

you can use the relay that can tolerate up to 2A at 24V

nRF24L01 Datasheet

Programmable backlight control for power saving

A couple of pieces of insulating tape on the underside of the board can protect against this

Combination WiFi + Bluetooth 4.0 USB Adapter Brand_PiFace RFID Access Control exampleAdd both WiFi and Bluetooth capability to your computer super fast with this USB Bluetooth WiFi Dongle! This little two faced cutie is so versatile! Its WiFi half can be used to make Internet of Things devices cable free or we also love to take advantage of a single board Linux computer's USB ports to add a low cost, but high reliability wireless link. The Bluetooth side of things can be used for all kinds of BLE connectivity projects and devices.