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prismo – a simple access module that can be reproduced by everybody.

The project was initially designed to be easily built by any maker, so we chose common, accessible, and easy-to-buy components. The device is a universal module that reads NFC keys/tags and outputs the result on one of two pins: the success pin or the error pin. So you can connect it to any hardware, such as a relay module, an electromagnet locker, a diode, etc.

BOM

The PCB

The board is designed in KiCad as a single-layer PCB, with a spacing of at least 0.8mm between each track and pad. So you can make the board using any type of board manufacturing process.

Components to buy

• RKGB LED diode, 4 items
• Resistor 100 ohms - 9 items, 4 for green color of the LED, 4 for blue color of the LED, one for the buzzer
• Resistor 150 ohms - 4 items, for the red color of the LED
• EPS32 C3 Super mini
• Active Buzzer 3V
• PN532

PINS

• PCB Board Pin Header male, 24 in total, 16 for supper mini (usually sold with the supper mini), 8 for PN532
• PCB Board Pin Header male, one row for PN532, single row 8 Pin

• PCB Standoff Spacer M3x4, 2 items
• Heat insert, 2 items
• M3x8 bolt, 2 items