This is a BeagleBone Black Cape designed for electronically locking or unlocking a single door. It can control either a 12V door strike or a 12V door magnet.

The cape has the following features:

• Dual relays to ensure door is closed if a relay fails
• opto-isolated GPIO inputs for detecting door status and/or relay failure
• Jumpers for configuring door strike or door magnet (NO/NC)
• on-board voltage regulator so BBB can be powered via 12V
• connectors for two external software controlled 12V lamps
• LED indicators for 12V, 5V, relay engagement, and external lamps
• 24C256 EEPROM w/ address configurable via jumpers
• headers for an RPi/Arduino-compatible realtime clock module