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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

llewellyn-timothy
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Software

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  1. 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

  2. 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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