Open Access Control for Hacker Spaces

Uses the Arduino open-source hardware to build a robust access control and alarm system.

It attaches to a standard Arduino as a shield and provides:

• Wiegand26 reader support (Two readers in v2.x hardware, up to 3 possible in software)
• Real-time clock (DS1307 RTC in v2.x hardware)
• On-board 5V switching power supply (1A rating)
• Alarm monitoring with multiple zones (4 in current hardware, uses analog inputs)
• Syslog-like serial logging
• 200 user local database stored in eeprom memory.
• Extensible and easy to modify.

Update: Kits and assembled units are now available here.

Update: The latest software release (v1.3x) has a serial terminal for administration, security improvements, and greatly reduced memory footprint.

Version 2.11 of the hardware features:

• On-board 5V switching power supply
• Robust circuit protection with MOV and TVS diodes
• Opto-isolation on all inputs using the NEC PS2501 series parts
• Full 5A continuous trace rating on all relays, 10A contact rating