Which SoC for RFID Reader? Raspberry Pi Zero W ?

The idea is to use a Raspberry Pi (_or Arduino_) to power the RFID Reader for the Door(s).

The Raspberry Pi Zero W has the following _advantages_:
+ Cheaper (_**£9.16** per board_) ... see screenshot below.
+ Lower power consumption (_can be "fed" from the 2.1A USB Wall Outlet_)

https://thepihut.com/products/raspberry-pi-zero-w

### Power Consumption Comparison

http://raspi.tv/2017/how-much-power-does-pi-zero-w-use

The "_official_" power consumption figures are a bit less informative:
https://www.raspberrypi.org/help/faqs/#powerReqs

### RFID Reader Chip

https://www.aliexpress.com/item/RFID-RC522-Module-Card-Read-Antenna-RF-Reader-IC-Card-Proximity-Sensor-FZ0565/32397071273.html