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Software. Microcontroller – CML-12C32 Coded in Assembly Language Main Loops – Check for AC power loss – Look for security check pass signal from the fingerprint scanner. Main Loop. Motor Control. Microcontroller. Output ports used to control the gate voltage of five

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Software

Software

  • Microcontroller – CML-12C32

  • Coded in Assembly Language

  • Main Loops

  • –Check for AC power loss

  • – Look for security check pass

  • signal from the fingerprint scanner

Main Loop

Motor Control

Microcontroller

  • Output ports used to control the gate voltage of five

  • MOSFET transistors

  • Input ports used to recognize signals from the

  • fingerprint scanner, limit switches, and loss of power

  • detector

  • 2.5 MHz Clock = 400 ns/operation

  • – 1.2 μs between limit switch checks


Software

Circuit Design

  • 120V AC to 24V DC Power Supply

  • Adjustable Voltage Regulators

    • – 24V DC to 13.8V DC (LM117)

    • – 13.8V DC to 6.2V DC

  • 12 AA size 2300 mAhNiMH Battery

  • Pack

  • Desk Lamp

    • – 4 White Superbright (16000 mCd) LEDs

    • (NTE30045)

    • – 1 N-Channel MOSFET (NTE2987)

  • H-Bridge Motor Control

    • – LMD18200 for drawer ejection and

    • withdraw

    • – Custom 8 N-Channel MOSFET deadbolt

    • motor control (NTE2987)

LM117 Voltage Regulator

LMD18200T

H-Bridge

NTE2987

N-Channel MOSFET


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